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The effect of asymmetric rolling on the microstructure and properties of Al–Cu–Li–TiC/TiB2 alloys Mater. Sci. Eng. A (IF 6.4) Pub Date : 2024-03-04 Haiyao Wang, Yong Li, Guangming Xu, Hongqun Tang, Yilei Wang, Jiadong Li, Beibei Li, Tongjin Zhang, Wei Yu, Yin Wang, Yuanyuan Liang
The study systematically investigated the impact of asymmetric rolling (AR) and subsequent aging treatment on the microstructure and mechanical properties of Al–Cu–Li–TiC/TiB alloy. The average grain size of the as-cast A0 and A1 alloys was 249.87 μm and 38.2 μm, respectively. The grain size was significantly refined by TiC and TiB particles. The texture of A0 and A1 samples after symmetric rolling
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Fused deposition modeling of Inconel 625 alloy: Effect of hot isostatic pressing on the microstructure and tensile properties Mater. Sci. Eng. A (IF 6.4) Pub Date : 2024-03-04 Young-Kyun Kim, Seong-June Youn, Ka Ram Lim, Young-Sang Na
Inconel 625 alloy was fabricated using fused deposition modeling (FDM), an emerging advanced additive manufacturing (AM) technique. Subsequently, the effects of hot isostatic pressing (HIP) on its microstructure and mechanical properties were investigated. Notably, HIP treatment significantly reduced the defect density, resulting in enhanced tensile ductility.
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Optimizing austenite and carbide content in medium carbon silicon-rich steel: A stepped partitioning strategy and analysis of strengthening and ductility enhancement mechanisms Mater. Sci. Eng. A (IF 6.4) Pub Date : 2024-03-04 Yuan Liu, Fei Zhao, Yuanbiao Tan, Wensen Huang, Ming Yang
To achieve the objective of enhancing the yield strength (YS) of quenching and partitioning (Q&P) steel without compromising tensile strength and ductility, a stepped partitioning (SP) strategy was proposed for Q&P treatment on medium carbon silicon-rich steel. The optimized partitioning strategy involves a two-stage partitioning, the first stage is conducted at temperatures above the martensite start
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Inhibiting sensitivity of microstructure and properties to heat input in DED-arc of 7075 aluminum alloys: The role of TiC-nanoparticles Mater. Sci. Eng. A (IF 6.4) Pub Date : 2024-03-04 Qinghu Guo, Yili Wang, Chen Zhang, Xiaochun Li
Achieving high-quality 7075 high-strength aluminum alloy manufactured via directed energy deposition-arc (DED-Arc) remains challenging due to its sensitivity of microstructures and properties to heat inputs. This study examines how TiC nanoparticles can effectively reduce the adverse effects of high heat input from the arc on the surface morphology, microstructure, and properties of 7075 aluminum alloy
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In-situ TEM study of dislocations in Mg–Y alloys Mater. Sci. Eng. A (IF 6.4) Pub Date : 2024-03-03 Jing Wu, Sirong Lu, Jinsen Tian, YuLung Chiu
In this work, in-situ TEM compression has been carried out to observe the nucleation and movement of dislocations in Mg–Y alloys. The effect of Y contents (0.4 wt% and 4 wt%) on the dislocation behaviour was studied. It was found that a larger yielding stress was needed to activate the slip in the alloy containing 4 wt% Y. The edge dislocations on the pyramidal II plane in Mg-0.4Y alloy assumed an
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Improvement of microstructures and mechanical properties of Mg–3Zn-0.5Zr by friction stir processing Mater. Sci. Eng. A (IF 6.4) Pub Date : 2024-03-02 Ji Wang, Ruidong Fu, Tianxiang Hu, Yijun Li, Yue Liu, Zhihua Zhu, Shide Li, Zhefeng Xu
Friction stir processing (FSP) has been applied to improve the microstructure and tensile performance of as-cast Mg–3Zn-0.5Zr magnesium alloy. By FSP, grains within the stir zone (SZ) demonstrate noticeable refinement and the varied processing parameters can lead to the formation of both strong and weak textures within the SZ. Second-phase particles are broken down, dispersed, and partially re-dissolved
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Role of Ti and Cr on microstructure and hydrogen embrittlement of welded joint of low-alloy steel used for armor layer Mater. Sci. Eng. A (IF 6.4) Pub Date : 2024-03-02 Zhenguang Liu, Yiming Wang, Yangdong Zhai, Nan Pan, Yongshi Zhang, Xiaonan Wang, Guoxiang Xu
Welded joints suffer from hydrogen embrittlement (HE) owing to the internal stress generated during welding. Alloying elements play a vital role in the metallurgical behavior of welded joints. In this study, the influence of chromium (Cr) and titanium (Ti) on the HE behavior of welded joints in low-alloy steel was investigated by examining the microstructural morphology, grain characteristics, precipitate
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Phase transformation, texture evolution, and mechanical properties of Mg-9.5Gd-4Y-2Zn-0.3Zr alloy wires fabricated using hot drawing Mater. Sci. Eng. A (IF 6.4) Pub Date : 2024-03-02 Mingyang Chen, Zihan Ling, Liqing Wang, Kai Ma, DongDong Zhang, Yunlong Li, Zhen Zhang, Zhanyong Zhao, Peikang Bai
Mg-9.5Gd-4Y-2Zn-0.3Zr alloy wires with a diameter of 1.2 mm were fabricated by a multistage drawing process with a cumulative area reduction (CAR) of 96% at 500 °C using as-extruded rods with a diameter of 6 mm as the raw material. Investigated the impact of microstructural transformations on the mechanical performance of these wires, with a focus on phase evolution, texture changes, and grain refinement
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Mechanical response in tension of twin-induced Mg alloys in wide strain rate regimes Mater. Sci. Eng. A (IF 6.4) Pub Date : 2024-03-02 Hidetoshi Somekawa, Rintaro Ueji, Alok Singh
Effect of twin boundary with/without segregating of solute atoms on deformation behavior in tension is examined in Mg–3Al–1Zn (AZ31) alloys from low strain rates to high strain rates. Solute atoms (Al and/or Zn atoms) are segregated at {10 2} twin boundaries by static annealing at a temperature of 423 K with a holding time of 150 min. The room-temperature tensile mechanical response of the specimens
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Micromechanical prediction of the elastic and plastic properties of sintered steels Mater. Sci. Eng. A (IF 6.4) Pub Date : 2024-03-02 Tim Fischer, Vladilena Gaisina, Michael Andersson, Per-Lennart Larsson, Peter Gudmundson
One of the characteristic features of sintered steels is the porosity in their microstructure resulting from the compaction and sintering process. This porosity strongly influences the mechanical properties. To enhance the understanding for the structure–property relationship of sintered Astaloy®85Mo with 0.4 wt.%C, a micromechanical modelling approach based on face-centred cubic (fcc) representative
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Achieving exceptional combination of strength and ductility in α+β diphase brass with harmonic structure Mater. Sci. Eng. A (IF 6.4) Pub Date : 2024-03-02 Xiaoqiang Chen, Chuan Wu, Yufei Zhang, Jiahe Mei, Lipeng Guo, Cuiping Wang, Shuiyuan Yang
Heterogeneous structures are an effective way to give materials excellent combined strength-ductility properties. In this study, Cu–Zn–Al–Fe alloys were prepared by homogenizing and hot rolling-annealing, and an α+β diphase brass with harmonic structure was obtained by adjusting the content of Zn. The microstructure and mechanical properties of Cu-Zn-4Al-2.8Fe ( = 14, 20, 22.5, 24, wt.%) were systematically
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Impact of hot rolling temperature on the mechanical properties and microstructural evolution of hot/cold-rolled AA5083 with Sc and Zr microalloying Mater. Sci. Eng. A (IF 6.4) Pub Date : 2024-03-01 Ahmed Y. Algendy, Paul Rometsch, X.-Grant Chen
The impact of hot rolling temperature on the microstructure evolution and mechanical properties of hot/cold-rolled AA5083 alloy containing Sc and Zr was studied. The results revealed that low hot-rolling temperatures (LHRT: 400–425 C) resulted in superior tensile properties compared to high hot-rolling temperatures (HHRT: 500–525 C). The yield strength (YS) of the LHRT samples reached 450 MPa in the
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Formation of nano martensite grain with specific angle grain boundary during the drawing process of 316L stainless steel Mater. Sci. Eng. A (IF 6.4) Pub Date : 2024-03-01 Qiang Li, Lichu Zhou, Yijie Pan, Jinfeng Ma, Xuefeng Zhou, Hongbin Jiang, Zonghan Xie, Feng Fang
The evolution of the deformation-induced martensite in the drawn 316L stainless steel and its effect on mechanical performance are examined. Both the yield strength and ultimate tensile strength of the 316L wire reach over 2.3 GPa at a drawing strain of 3.44. The deformation production of the wire during the drawing process is dislocation, twin and finally, deformation-induced α′-martensite. The neighbouring
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Effect of the Cu additives on strain-induced coarsening of the Laves phase in Re-containing 10% Cr–3% Co martensitic steels Mater. Sci. Eng. A (IF 6.4) Pub Date : 2024-02-29 A. Fedoseeva, A. Klauz, N. Iskandarov, A. Boev, D. Aksyonov, R. Kaibyshev
The effect of the Cu additives (0.8 wt%) on strain-induced coarsening of the Laves phase was investigated via the comparison of the Laves phase behavior in the Re-containing steels with the different W and Cu contents during creep and aging at a temperature of 650 °C. The formation of the “Cu”-clusters/precipitates with an average size of 3 nm randomly distributed within the ferritic matrix was revealed
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Combining strength and ductility in a precipitation (γ’) hardened Fe-rich compositionally complex alloy via recystallisation Mater. Sci. Eng. A (IF 6.4) Pub Date : 2024-02-29 M. Annasamy, J. Joseph, P. Cizek, A. Vahid, M.R. Barnett, P.D. Hodgson, D.M. Fabijanic
Fe-rich alloys are the most attractive among the compositionally complex alloys (CCAs) owing to the excellent combinations of mechanical properties combined with low cost. The kinetics of recrystallisation and grain growth of an austenitic Fe-35.5Ni–4Cr-6.3Al-3.2Ti alloy (in at.%) is systematically studied to balance the combination of high strength and good ductility through grain refinement and the
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Considering interplay between multiple physical phenomena to elucidate single crystal-like texture, phase transformations, and mechanical behavior of directed energy deposited SS316L Mater. Sci. Eng. A (IF 6.4) Pub Date : 2024-02-29 Saket Thapliyal, Patxi Fernandez-Zelaia, Yousub Lee, Andres M. Rossy, Luke Meyer, Andrzej Nycz, Yukinori Yamamoto, Michael M. Kirka
A widespread implementation of large scale additive manufacturing (AM) processes, such as wire arc-directed energy deposition (WA-DED) AM can transform the current manufacturing supply chain networks. Naturally, such implementation requires control of the microstructural attributes, such as texture and phase evolution in the processed alloys. Currently, the texture evolution in fusion-based AM (F-BAM)
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Evolution of bimodal-structure and achieving ultra-high yield strength in the as-extruded ZK70 alloy via Gd addition Mater. Sci. Eng. A (IF 6.4) Pub Date : 2024-02-29 X.R. Zhang, J.R. Zuo, D.D. Zhang, D.Q. Fang, X.D. Ding, J. Sun
Achieving ultra-high tensile yield strength over 400 MPa in RE modified Mg–Zn-based alloys using conventional thermomechanical processing is a challenging task. In this study, we successfully produced a Mg–7Zn–2Gd–0.5Zr (wt. %) alloy with exceptional strength through traditional hot-extrusion techniques. This alloy exhibits a tensile yield strength of 440 MPa and an acceptable ductility of 4.5%, surpassing
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Fabrication of spatially-variable heterostructured CoCrFeMnNi high entropy alloy by laser processing Mater. Sci. Eng. A (IF 6.4) Pub Date : 2024-02-28 Jiajia Shen, Yeon Taek Choi, Jin Yang, Jingjing He, Zhi Zeng, N. Zhou, A.C. Baptista, Hyoung Seop Kim, J.P. Oliveira
This study investigates the fabrication of spatially-variable heterostructured CoCrFeMnNi high entropy alloy (HEA) using pulsed laser processing. Two distinct fabrication approaches, involving single-(SP) and double-sided (DP) laser passes, were employed. Microstructural characterization through electron backscatter diffraction revealed significant differences. SP-HEA exhibited a spatially heterogeneous
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Influence of the solid solution duration on the microstructure and mechanical properties of the Al–10.0Zn–3.0Mg–2.5Cu alloy Mater. Sci. Eng. A (IF 6.4) Pub Date : 2024-02-28 Xianwei Ren, Jinlong Zhang, Zhimin Zhang, Qiang Wang, Yong Xue, Haijun Liu, Mo Meng, Xi Zhao, Hailong Liu
Intragranular and grain boundary precipitates (GBPs) and precipitate-free zones (PFZ) are critical for regulating the properties of an Al–Zn–Mg–Cu alloy. Herein, an even precipitate dispersion strategy, including microparticle dissolution and grain refinement in a solid solution (SS), was introduced to optimize the microstructure and mechanical properties of the Al–10Zn–3Mg–2.5Cu alloy, with the SS
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Achieving 2.9 GPa yield strength in Inconel 718 alloy with Cr-segregated nanograins Mater. Sci. Eng. A (IF 6.4) Pub Date : 2024-02-28 Yingguang Tang, Baobing Zhang
A gradient nanostructure was prepared in aged Inconel 718 by means of surface mechanical grinding treatment at room temperature. At the top surface layer with a thickness of ∼50 μm, the grain was refined down to extremely fine size (∼10 nm) and an abnormal Cr enrichment was detected on the grain boundaries. This Cr-segregated extremely-fine nanograin exhibits an unprecedented yield strength of ∼2935
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Development of ultra-high strength Al–Cu–Li alloys containing high Mg through the combination of pre-stretching and age-hardening Mater. Sci. Eng. A (IF 6.4) Pub Date : 2024-02-28 Yuankang Xie, Shengdan Liu, Xiaobin Guo, Yunlai Deng
Precipitation strengthening and strain hardening after pre-deformation in low Mg Al–Cu–Li alloys dominated by T phases have been widely studied in recent years due to their excellent mechanical properties. In this study, the aging precipitation behavior and the associated strengthening mechanisms caused by the increasing dislocation density in high Mg Al–Cu–Li alloys were systematically studied. The
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Establishment and application of an internal-variable-based constitutive model for the superplastic deformation of Inconel 718 alloy Mater. Sci. Eng. A (IF 6.4) Pub Date : 2024-02-28 Xu Yang, Zhuocheng Li, Shu-nan Chen, Bingxing Wang, Bin Wang, Yong Tian, Jun Wang
Predicting mechanical behavior and microstructure evolution via numerical simulation is an effective way to improve the quality of superplastic-formed products for nickel-based superalloys. Analysis of mechanical and microstructures during the stable superplastic deformation of Inconel 718 indicates that dislocation propagation and grain growth lead to stress increase, while recovery and dynamic recrystallization
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Laser powder bed fusion on Ti modified Al 2024 alloy: Influence of build orientation and T6 treatment on mechanical behaviour, microstructural features and strengthening mechanisms Mater. Sci. Eng. A (IF 6.4) Pub Date : 2024-02-28 Saurabh Gairola, R. Jayaganthan, Joe Ajay
The present study investigates the laser powder bed fusion of Al 2024 alloy. The Al 2024 is one of the most widely used aluminium alloys in aerospace industries owing to its excellent mechanical properties such as high strength-to-weight ratio, high fatigue and fracture strength, etc. However, the additive manufacturing of the Al 2024 alloy is scarce in literature due to its high solidification cracking
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Effects of ultrasonic treatment on mechanical properties and microstructure of stainless steel 308L and Inconel 718 functionally graded materials fabricated via double-wire arc additive manufacturing Mater. Sci. Eng. A (IF 6.4) Pub Date : 2024-02-28 Tae-Won Jeong, Young Tae Cho, Choon-Man Lee, Dong-Hyeon Kim
Functionally graded materials (FGMs) are composites comprising various materials that can overcome the limitations of homogeneous materials, such as abrupt property changes at material interfaces. This results in gradual changes in the microstructure and composition, thus limiting the performance optimization under complex operating conditions. In this study, a novel ultrasonic-assisted double wire
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Inhomogeneity of microstructure evolution in stir zone of 2195Al thick-plate FSW joints Mater. Sci. Eng. A (IF 6.4) Pub Date : 2024-02-27 Yisong Gao, Huijie Liu, Shuaishuai Du, Quansheng Zhang, Dongrui Li, Yingying Zuo, Xuanmo Li
An appropriate friction stir welding (FSW) tool has been developed to perform high-quality joining of 12 mm thick Al-Li alloy plates. Threads and triple facets were machined on the stirring pin to improve the material flow. The differences in microstructure characteristics, recrystallization mechanisms, and precipitate evolution along the stir zone (SZ) thickness were systematically clarified. The
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Understanding the asymmetric orientations and stress states in polycrystalline NiTi SMA by in-situ synchrotron-based high-energy X-ray diffraction Mater. Sci. Eng. A (IF 6.4) Pub Date : 2024-02-27 Pengyue Gao, Runguang Li, Dongdong He, Caijuan Shi, Zhen Zhang, Jianzhou Huang, Qisheng Feng, Xueliang Kang, Guangyao Chen, Wei Peng, Yuzi Liu, Yang Ren, Xionggang Lu, Chonghe Li
The stress-induced martensite transformations (SIMTs) dramatically affect the recoverable strain and mechanical response of polycrystalline NiTi. An in-depth understanding of the propagation manner and orientation preference of SIMTs is therefore crucial. In this work, we present a unique asymmetric anisotropy of SIMTs and lattice strains induced by Lüders-type deformation in polycrystalline NiTi,
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Effect of accumulative hot rolling on the microstructure and mechanical properties of dual-phase titanium alloy consolidated via SPS sintering Mater. Sci. Eng. A (IF 6.4) Pub Date : 2024-02-27 Jun-Jie Cheng, Ze-Kun Zheng, Jing-Li Zhang, Ming-Yang Li, Mei Zhang, Xiao-Qi Mao, Yun-Ting Hou, Peng-Fei Zhang, Ming-Jia Li, Jun-Jie Xu, Long-Long Dong, Guo-Dong Sun
The improvement of microstructure and mechanical properties of Ti alloys is of great significance for their industrial application. In this study, a developed multi-step hot deformation process was employed to regulate the grain boundaries (GBs), hetero-phase boundaries (PBs) and dislocation structure for dual-phase titanium alloy. The effects of accumulative thermal deformation ratios from 33% to
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Effect of aging treatment on high temperature mechanical properties of a cast Al–Li–Cu alloy Mater. Sci. Eng. A (IF 6.4) Pub Date : 2024-02-27 Shuo Zhang, Fangzhou Qi, Liang Zhang, Guohua Wu, Xin Tong, Junmin Zhan, Yan Wang, Yingjing Geng
The effects of aging treatment on the high temperature mechanical properties of cast Al–2Li–2Cu-0.5Mg-0.15Sc-0.15Zr-0.05Ti alloy were investigated. Different test temperature (25 °C, 175 °C, 200 °C, 225 °C) and aging time (aging for 8 h, 32 h, 64 h at 175 °C) were designed for comparison. The results showed that at room temperature, the strength of the alloy improved with the prolongation of aging
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Revisit of bake hardening mechanism: Influence of baking on tensile properties of press hardening steels Mater. Sci. Eng. A (IF 6.4) Pub Date : 2024-02-26 Cancan Ding, Haifeng Zhao, Dechao Xu, Zhipeng Liu, Chengyuan Deng, Bin Hu, Wenwen Song, Yandong Wang, Haiwen Luo
Paint baking is a process in automotive industries to accelerate the curing of paint and increase yield strength of steel panel for improving the dent resistance due to the formation of well-known Cottrell's atmosphere. However, our careful study on bake hardening mechanism of three press hardening steels (PHS) indicates a different explanation. We developed two novel Nb/Si alloyed steels with superior
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Effect of N on microstructure evolution and strain hardening of high-Mn austenitic steel during tensile deformation Mater. Sci. Eng. A (IF 6.4) Pub Date : 2024-02-26 Xiaohong Hao, Xiaowen Sun, Ting Zhao, Mengya Zhang, Yuefeng Wang, Fucheng Zhang, Jing Zhao, Tiansheng Wang
The present study investigated the microstructure evolution and strain hardening of two types of high-Mn austenitic steels, i.e., Fe−18.5Mn–7Cr−0.6C(00N) and Fe−18.5Mn–7Cr−0.6C−0.21N(21N), during tensile deformation. The results revealed that the addition of N increased the yield and tensile strength of high-Mn austenitic steel with almost no loss of elongation. The strain hardening of the 00N and
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Microplasticity induced damping of aluminum foam Mater. Sci. Eng. A (IF 6.4) Pub Date : 2024-02-26 Si-yuan He, Ruicheng Wang, Wen-hao Chen, Chen Zhang, Wei Zhao, Kang Gao
Aluminum foam's high dampening properties provide substantial potential for reducing mechanical vibration and noise in lightweight applications. However, inadequate understanding of the damping mechanism cannot provide sufficient theoretical guidance to improve the damping performances. In this study, the DMA (Dynamic Mechanical Analysis) tests results were compared with the numerical simulations to
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Revealing the mechanism of ductility discrepancy between two 2205 duplex stainless steels containing layered and island austenite through in-situ experiment Mater. Sci. Eng. A (IF 6.4) Pub Date : 2024-02-26 Wenxin Wang, Gang Lu, Xutao Huang, Haitao Huang, Yujie Liu, Jianjun Wang, Chunming Liu
A notable discrepancy in tensile ductility was observed between two 2205 duplex stainless steels (DSS) containing layered and island-like austenite microstructures. The deformation behavior of both DSS 2205 was compared through in-situ Electron Backscatter Diffraction (EBSD) and Scanning Electron Microscope (SEM) techniques. The results indicated that the microscopic deformation mechanism for both
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Hydrogen embrittlement of FeCrAl alloys: The significant role of Laves phase and AlN particles Mater. Sci. Eng. A (IF 6.4) Pub Date : 2024-02-26 Xinyi Pang, Donghai Du, Hui Wang, Xuguang An
The addition of Nb to FeCrAl alloy enhanced its mechanical properties owing to the precipitated-phase strengthening effect. However, the additive amount and its effect on hydrogen embrittlement (HE) susceptibility have to be evaluated before implementation, as the hydrogen produced by fission and corrosion in the reactor may affect its mechanical properties. Therefore, hydrogen pre-charged tensile
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Formation and strengthening mechanism of equiaxial cellular grain zone in AA2195-T8 Al–Cu–Li alloy twin-wire P-VPPA welded joint with Ti–Zr microalloying Mater. Sci. Eng. A (IF 6.4) Pub Date : 2024-02-24 Guihan Cui, Chunli Yang
A novel method involving twin-wire pulsed VPPA (P-VPPA) welding was combined with Ti–Zr microalloying to improve the mechanical properties of AA2195-T8 Al–Cu–Li alloy variable polarity plasma arc (VPPA) welded joints. This method aimed to increase the width of the equiaxial cellular grain zone (ECZ) by adding higher content of Ti–Zr and reducing heat input. The microstructure evolution process was
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Effects of Laves phase precipitation embrittlement and its dissolution kinetics in super-ferritic stainless steels on the ductile-brittle transition Mater. Sci. Eng. A (IF 6.4) Pub Date : 2024-02-24 Ling-Yun Du, Hui-Hu Lu, Jian-Shan Han, Ze-Zhou Xing, Yi-Nan Wang, Hai-Tao Liu, Shu-Hai Zhang
This study simulated the Laves phase precipitation embrittlement of super-ferritic stainless steels (SFSSs). The dissolution kinetics of the Laves phase, grain coarsening, and their effects on the mechanical properties and ductile-brittle transition during dissolution heat treatment were subsequently studied. The Laves phase dissolution adhered to the Johnson-Mehl-Avram-Kolmogorov variation expression
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Excellent low-temperature toughness of 1 GPa grade microlaminated 5Mn steel containing retained austenite Mater. Sci. Eng. A (IF 6.4) Pub Date : 2024-02-23 D.Z. Li, B.J. Wang, X.J. Shen, S. Tang, X.M. Zhao, G.D. Wang
The development of high-strength steels with excellent low-temperature toughness continues to present significant challenges. Delamination toughening and retained austenite (RA) toughening are effective methods for improving the low-temperature toughness of steels. In the present study, medium manganese steel with a microlaminated microstructure containing blocky RA is prepared by intercritical rolling
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Effects of mechanical heterogeneity and dislocation storage capacity on the strength–ductility synergy of heterostructured laminates Mater. Sci. Eng. A (IF 6.4) Pub Date : 2024-02-22 Zhongchen Zhou, Jiansheng Li, Yanfei Wang, Qingzhong Mao, Yi Liu, Yu Yue, Chongxiang Huang, Yusheng Li
Heterostructured laminates have attracted significant attention in the materials community owing to their exceptional combination of strength and ductility. However, long-standing questions remain regarding the impact of the strength difference between the soft and hard layers on the synergistic strengthening in hetero-laminates with weak mechanical heterogeneity; the role played by soft/hard layers
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Study on the relationship between the refined hierarchical microstructure, yield strength and impact toughness of low-carbon martensitic steel at different quenching temperatures Mater. Sci. Eng. A (IF 6.4) Pub Date : 2024-02-22 Di Wang, Shaoguang Yang, Hui Jiang, Kuo Cao, Jun Xiao, Hui Guo, Rongquan Liu, Aimin Zhao
In this work, a new equation to evaluate the yield strength change caused by grain refinement was proposed in low-carbon martensitic steel, based on the Hall-Petch formula. MATLAB analysis showed that martensite and the prior austenite grain (parent phase) were more consistent with the Kurdjumov and Sachs orientation relationship in the martensitic transformation process. The martensite variant selectivity
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Effect of hierarchical martensitic microstructures on the ductile-brittle transition behavior of friction stir welded reduced activation ferritic/martensitic steel Mater. Sci. Eng. A (IF 6.4) Pub Date : 2024-02-22 Shengli Li, Lei Shi, Ji Chen, Xinqi Yang, Alexander Hartmaier, Chuansong Wu
The welded joints of reduced activation ferritic/martensitic (RAFM) steel should exhibit superior toughness to ensure that structural components are not prone to fracture due to irradiation embrittlement under long-term neutron irradiation conditions. Friction stir welding (FSW) of RAFM steel was performed, considering the potential advantages of obtaining welded joints with a good balance of strength
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Enhanced compressive creep properties of a Y2O3-bearing Ti–48Al–2Cr–2Nb alloy additively manufactured by electron beam powder bed fusion Mater. Sci. Eng. A (IF 6.4) Pub Date : 2024-02-22 Hangyu Yue, Yunlou Wang, Hui Peng, Kesong Miao, Zhenquan Liang, Lijuan Xu, Shulong Xiao, Boyang Gao, Xinliang Xie, Xuewen Li, Qi Chao, Guohua Fan
Electron beam powder bed fusion (EBPBF) was used to fabricate a Ti–48Al–2Cr–2Nb alloy incorporated with 0.2 wt% YO nano-ceramic powders. Spherical YO nanoparticles with the particle size of 20–40 nm were uniformly distributed throughout the as-built TiAl alloy, and the average particle size was 30 nm. The effect of YO nanoparticles on compressive creep properties was investigated and the creep tests
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Large reversible multicaloric effects over a broad refrigeration temperature range in Co and B co-doped Ni–Mn–Ti alloys Mater. Sci. Eng. A (IF 6.4) Pub Date : 2024-02-22 Bo Li, Zhenpeng Liu, Dou Li, Zhenyu Feng, Jiaxi Zhu, Hong Zhong, Shuangming Li
Solid-state refrigeration is considered a promising alternative to traditional vapor compression refrigeration technology. Researchers demonstrated that Ni–Mn–Ti alloys have a remarkable elastocaloric effect. However, the Ni–Mn–Ti alloy can only operate under a uniaxial stress field due to its antiferromagnetic austenite, which narrows its range of refrigeration temperatures. Here, we activated the
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Special interlayer pause strategy for controlling grain morphology and tensile property anisotropy of TC11 alloys fabricated by directed energy deposition technology Mater. Sci. Eng. A (IF 6.4) Pub Date : 2024-02-22 Kefan Wang, Ziyu Fang, Hongjun Li, Sen Yang
Directed energy deposition (DED)-built titanium alloys have long suffered from the anisotropic mechanical properties induced by the long columnar prior β grains growing along the building direction, which restricts their applications. In this work, a special interlayer pause (SIP) strategy is designed to reduce the tensile property anisotropy by adjusting the grain morphology. The grain morphologies
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Effects of different combinations of artificial ageing and warm forming on Ω phase and S phase evolutions in an Al-5.1Cu-1.0Mg-0.4Ag high strength aluminum alloy Mater. Sci. Eng. A (IF 6.4) Pub Date : 2024-02-22 Cheng-Ling Tai, Yi-Xian Lin, Chien-Yu Tseng, Tsai-Fu Chung, Yo-Lun Yang, Tzu-Ching Tsao, Shih-Yuan Lu, Po-Han Chiu, Te-Cheng Su, Chih-Yuan Chen, Sheng-Long Lee, Jer-Ren Yang
Unlike common age-hardening materials, deformation prior to artificial ageing has been found to adversely affect the hardness of AA2040 aluminum alloy. To prevent this disadvantage, the effects of four different combinations of warm forming and artificial ageing at 200 °C on the microstructures and Vickers hardness of Al-5.1Cu-1.0Mg-0.4Ag aluminum alloy have been investigated. Among the four different
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Fracture behavior and constitutive relations of Sn-3.0Ag-0.5Cu solder alloy at cryogenic temperature Mater. Sci. Eng. A (IF 6.4) Pub Date : 2024-02-21 Shengli Li, Chunjin Hang, Wei Zhang, Yanhong Tian, Dan Yu, Ying Ding, Xiuli Wang
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Heat treatment protocol for additively manufactured nitinol shape memory alloys in biomedical applications Mater. Sci. Eng. A (IF 6.4) Pub Date : 2024-02-21 Sarower Tareq, Tanzilur Rahman, Bibek Poudel, Haseung Chung, Patrick Kwon
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Effect of heat treatment on microstructure evolution, strengthening mechanisms and mechanical properties of Zn modified Al–Mg alloys with Sc and Zr additions Mater. Sci. Eng. A (IF 6.4) Pub Date : 2024-02-20 Peng Sun, Yusheng Huang, Linlin Sun, Ya Li, Xiaoyu Zheng, Bo Li, Xiwu Li, Hongwei Yan, Yuling Liu, Yong Du
In this work, a new Al–Mg–Zn alloy was designed based on thermodynamic calculations combined with the concept of cooperative strengthening and toughening. The influence of different aging processes on microstructure and mechanical properties of the designed Al–Mg–Zn alloy was studied using experimental techniques including hardness testing, room-temperature tensile testing, EBSD, and HRTEM. The results
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Enhanced quasi-static and dynamic tensile properties of stainless steel 316L produced by laser aided additive manufacturing in controlled argon environment Mater. Sci. Eng. A (IF 6.4) Pub Date : 2024-02-20 Li Zhang, Wengang Zhai, Kai Zhao, Guijun Bi, Wei Zhou, Guoxing Lu, Shanqing Xu
In this paper, laser aided additive manufacturing (LAAM) of stainless steel 316L (SS 316L) in a controlled argon environment was investigated. The controlled argon environment can significantly reduce the oxidation and fundamentally change the process conditions. It was found that after inhibiting oxidation, the surface of the deposited 316L showed remarkably high reflectance (71%) to laser radiation
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Cooperative achievement in grain refinement and texture weakening of Mg-Gd-Y-Sm-Zr alloy fabricated by asymmetric extrusion-shear process Mater. Sci. Eng. A (IF 6.4) Pub Date : 2024-02-20 Yanbo Pei, Meng Yuan, Enbo Wei, Zijian Zhang, Maosheng Zhao, Hongjun Ma, Bugang Teng
Mg-Gd-Y-Sm-Zr alloy with fine grains and weak texture was fabricated by extrusion-shear (ES) process. The microstructure evolution mechanism of the alloy during asymmetric plastic deformation process was analyzed. At the forward extrusion stage, the initial coarse grains are refined significantly under the synergistic action of discontinuous dynamic recrystallization (DDRX), continuous dynamic recrystallization
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Precipitation and tensile behaviors of Allvac 718Plus superalloy during long-term thermal exposure Mater. Sci. Eng. A (IF 6.4) Pub Date : 2024-02-20 Liting Tang, Qianying Guo, Chong Li, Ran Ding, Yongchang Liu
Allvac 718Plus alloy is a promising Ni-based superalloy with excellent thermal stability and mechanical properties up to 704 °C. The γ′ coarsening, σ precipitation and the resulting degraded tensile properties at room and elevated (704 °C) temperatures during long-term thermal exposure at 704 and 760 °C are systematically investigated in this work. The results showed that a higher exposure temperature
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Influence of ultrasonic surface rolling on tensile properties of high carbon low alloy quenching-partitioning-tempering steel Mater. Sci. Eng. A (IF 6.4) Pub Date : 2024-02-20 Shengwei Qin, Guangrui Wang, Zhimin Zhu, Zixin Song
The effect of ultrasonic surface rolling process on tensile properties of a novel Fe-0.6C-2.0Al-1.5Mn-0.04 Nb quenching-partitioning-tempering steel was investigated. Optical microscope, scanning electron microscopy, X-ray diffraction, and transmission electron microscopy were brought out to characterize the microstructure. Compared with quenching-partitioning-tempering steel, the strength and plasticity
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Synthesis and characterization of onion-like carbon /TiN0.3 enhanced Si3N4 composites Mater. Sci. Eng. A (IF 6.4) Pub Date : 2024-02-20 Qin Zou, Zhenxiong Yuan, Yanguo Li, Leyan Xu, Shijie Li, Yu Ren, Yujiao Ke, Yongan Luo
Research on how to obtain SiN composites with high hardness and toughness at lower temperatures is important. SiN composites with onion-like carbon (OLC)-TiN were prepared using high pressure and high temperature techniques. The effects of TiN and OLC additives on the mechanical properties and microstructure of the silicon nitride ceramics were analyzed. During the sintering process, the vacancies
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Fatigue strength of an ultra-high strength low alloy steel fabricated via laser powder bed fusion Mater. Sci. Eng. A (IF 6.4) Pub Date : 2024-02-20 Nemanja Kljestan, Brandon A. McWilliams, Marko Knezevic
High strength low alloy (HSLA) steels are important metallic materials especially in the defense and military sectors due to their superior mechanical properties and cost-effectiveness compared to superalloys. This study investigates monotonic tension/compression strength and fatigue strength, including both the low cyclic fatigue (LCF) and high cyclic fatigue (HCF), of a HSLA steel produced using
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Tempering behavior of an ultra-high-strength steel with 1.6 wt% Si at low to medium temperatures Mater. Sci. Eng. A (IF 6.4) Pub Date : 2024-02-19 D. Yuzbekova, V. Dudko, T. Kniaziuk, R. Kaibyshev
Tempering behavior of a 0.53%C-1.6%Si-0.9%Mn-0.76%Cr-0.14%V-0.05%Nb steel was examined. Water quenching produced lath martensite structure with a 10.5% volume fraction of retained austenite (RA) with film-like shape. Low temperature tempering (LTT) leads to precipitation of transition carbides and carbon partitioning between martensite and RA. The following precipitation sequence was found: martensite
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Additive friction stir deposition of AA7050 achieving forging-like tensile properties Mater. Sci. Eng. A (IF 6.4) Pub Date : 2024-02-19 Greg D. Hahn, Kendall P. Knight, Nikhil Gotawala, Hang Z. Yu
Owing to hot cracking, printing aerospace grade AA7050 is challenging via fusion-based additive manufacturing. Using a deformation-based additive process, here we show that forging-like tensile properties are achieved in additively manufactured AA7050 without chemical modification for the first time (excluding lubricant on feed-rod surfaces) — YS: 430 MPa; UTS: 491 MPa; elongation: 11.2% with T74 temper
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Improvement of mechanical property of M2 high-speed steel with hetero-microstructure tailored via electron beam melting Mater. Sci. Eng. A (IF 6.4) Pub Date : 2024-02-18 Ye Li, Yan Wang, Shifeng Liu, Jian Wang, Jingzhe Niu, Xuezhe Zhang, Yan Lin, Jun Ma, Guangyun Yang, Zhaohui Zhang
The aim of this study is to enhance the plasticity and strength of M2 high-speed steel through electron beam melting (EBM) technology. Therefore, by controlling different melting times to change the energy input, a gradient distribution of grain size and uniform distribution of carbides can be achieved. During the deformation process, the gradient structure causes geometrically necessary dislocations
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Ultra-strength of Ti films via (002) texture optimization and nanocolumnar strengthening Mater. Sci. Eng. A (IF 6.4) Pub Date : 2024-02-18 Yan Pan, Binghao Wang, Deqing Xue, Bo Deng, Changsheng Tan, Guojun Zhang
This paper focused on the correlation between the (002) texture, columnar grain size and mechanical properties of Ti films prepared by magnetron sputtering. The (002) texture and columnar grain evolution were controlled under a combination of substrate bias voltage and argon flow rate. It was found that the substrate bias voltage was the key factor to dominate the (002) texture and columnar grain size
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The microstructure evolution and strength mechanism of Ni3(Al, Ti)-type multicomponent alloy with superior mechanical property by laser melting disposition Mater. Sci. Eng. A (IF 6.4) Pub Date : 2024-02-17 Zhihao Han, Ling Zhao, Haiping Zhou, Hongbin Zhang, Xue Liu
By introducing nanoscale disordered interfaces into the ordered superlattice grains can achieved a combination of ultra-high strength and excellent ductility in NiAl-type high-temperature alloys, but limited by the complex preparation process. In the present work, a Ni(Al, Ti)-type multicomponent alloy of NiCoFeAlTiB was successfully fabricated using laser metal deposition (LMD) technique. The microstructural
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Interplay between high-temperature creep deformation behavior and nanoscale precipitate evolution in a newly designed Fe–Ni-based superalloy Mater. Sci. Eng. A (IF 6.4) Pub Date : 2024-02-17 B.K. Pan, L.L. Wei, C.H. Jiao, Z.J. Hong, R.D.K. Misra, X.S. Jia
In an endeavor to achieve the critical goals of carbon neutrality, an explorative study was conducted to scrutinize the precipitate evolution and high-temperature creep behavior of an innovative and cost-effective Fe–Ni-based superalloy that was meticulously engineered for the next-generation ultra-supercritical (USC) power plants. The creep experiments conducted at temperatures and stresses of 650
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Effects of novel Mg-RE master alloys prepared via ultrasonic assisted cast on the microstructure and properties of Mg-Gd-Y alloy Mater. Sci. Eng. A (IF 6.4) Pub Date : 2024-02-17 Yazhao Shen, Kui Wang, Haonan Li, Yunqiang Zhen, Funian Han, Xiang Chen, Haiyan Jiang, Quding Wang, Wenjiang Ding
The novel Mg-RE master alloys have been prepared upon addition of TiCN nanoparticles (NPs) to the master alloys via ultrasonic assisted cast. The microstructural analysis shows that the primary α-Mg dendrites and RE-rich phases in the matrix of Mg-RE master alloys can be considerably refined when the nanoparticle addition level reaches up to 2 vol%. The nanoparticles with an average size of 48.2 nm
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Unexpected strengthening of the Mo-containing low-density steel achieved through a novel nano-ordered phase Mater. Sci. Eng. A (IF 6.4) Pub Date : 2024-02-16 Yuxiang Liu, Jianlei Zhang, Yunhu Zhang, Gang Chen, Changjiang Song, Qijie Zhai
Mo element has been considered as an effective element to regulate the nano-precipitation behavior in low-density steel. In this work, a novel nano-ordered phase was found in austenite of the Fe–28Mn–10Al-1.2C (wt.%) low-density steels with 3 wt% and 5 wt% Mo addition. HRTEM characterization indicated that this nano-ordered phase had a chemical composition similar to austenite matrix and a L′1 structure