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Fabrication of carbon nanotubes/Cu composites with orthotropic mechanical and tribological properties Mater. Sci. Eng. A (IF 4.652) Pub Date : 2021-01-16 Zhong Zheng; Yang Chen; Meng Zhang; Jishi Liu; Anxin Yang; Lie Chen; Qibiao Yang; Deyuan Lou; Dun Liu
In this work, Multi-Walled Carbon Nanotubes reinforced copper matrix composites were prepared through a series of preparation processes including ultrasonic and nitrogen-assisted mixing, electroless Nickel–Copper bilayers plating, hot extrusion and cold drawing. The mechanical and tribological properties of the composites were enhanced with the increase of MWCNTs. The Cu matrix composites enhanced
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Stress state dependent creep damage behavior of 9–12% Cr steel notched components Mater. Sci. Eng. A (IF 4.652) Pub Date : 2021-01-12 Tian-Ye Niu; Peng Zhao; Gang Zhu; Jian-Guo Gong; Fu-Zhen Xuan
Creep damage is governed by different microstructural features (e.g. precipitate coarsening, substructure growth, cavity/crack nucleation and growth) during long term high temperature exposure in 9–12%Cr steels. The dependences of stress states (e.g. equivalent stress and stress tri-axiality) on these damage mechanisms are clarified in this work. Various stress states are produced in FB2 steel notched
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Martensitic transformation and mechanical properties of grain refined Ni–Co–Mn–Sn Heusler alloys via Cr doping Mater. Sci. Eng. A (IF 4.652) Pub Date : 2021-01-16 Yajiu Zhang; S. Vinodh Kumar; Wanwan Xiang; Zhigang Wu; Zuoyu Sun
The influence of Cr doping for Mn on the structural, martensitic transformation and mechanical properties of Ni43Co5Mn44-xCrxSn8 (x = 0, 1.5, 3, 5, 6 and 6.5) alloys has been systematically investigated. The replacement of Mn by Cr changed the alloy microstructure from a single-phase martensite to a refined eutectic dual-phase microstructure consisting of a martensitic/austenitic matrix and a γ phase
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The effect of Hf on solidification cracking inhibition of IN738LC processed by Selective Laser Melting Mater. Sci. Eng. A (IF 4.652) Pub Date : 2021-01-06 Zhengrong Yu; Chuan Guo; Shuang Han; Xiaogang Hu; Lijie Cao; Zhen Xu; Hui Ding; Qiang Zhu
The effects of Hf addition on defects and mechanical properties of the “hard-to-weld” superalloy IN738LC manufactured by Selective Laser Melting (SLM) process were studied. The addition of Hf inhibits cracking in SLMed IN738LC. Cracking free and low porosity IN738LC parts were obtained in a wide range of process parameters. The study shows that the cracks were refilled by Hf-riched melt and the relative
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Microstructure evolution and tensile properties of as-rolled TiB/TA15 composites with network microstructure Mater. Sci. Eng. A (IF 4.652) Pub Date : 2021-01-16 Shuai Wang; Lujun Huang; Shan Jiang; Rui Zhang; Baoxi Liu; Fengbo Sun; Qi An; Yang Jiao; Lin Geng
To investigate the microstructure evolution and mechanical properties of DRTMCs with network microstructure during the rolling deformation, the TiB whiskers reinforced Ti-6.5Al–2Zr–1Mo–1V (TA15) composites (TiBw/TA15) with the addition of silicon element and different TiB volume fractions were successfully fabricated by hot pressing sintering and rolled in the α+β region. Compared with the as-sintered
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Simultaneous enhancement of dispersion and interfacial adhesion in Al matrix composites reinforced with nanoceramic-decorated carbon nanotubes Mater. Sci. Eng. A (IF 4.652) Pub Date : 2021-01-16 Weiwei Zhou; Peng Yang; Yuchi Fan; Naoyuki Nomura; Akira Kawasaki
Simultaneously achieving homogeneous dispersion and appropriate interfacial adhesion is the foremost concern for designing high-performance carbon nanotube (CNT)/Al matrix composites. Herein, a strategy for surface modification was developed to fabricate uniform CNT/Al composites with enhanced interfacial strength. Small quantities of Al2O3 nanoparticles were locally adhered to the surface of functionalized
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Influence of Ni4Ti3 precipitate on pseudoelasticity of austenitic NiTi shape memory alloys deformed at high strain rate Mater. Sci. Eng. A (IF 4.652) Pub Date : 2021-01-07 Hao Yu; Ying Qiu; Marcus L. Young
The influence of heat treatment on mechanical properties of austenitic NiTi alloys during impact loading is studied in this paper. Hot-rolled rod samples were annealed at 800 °C for 5 h to obtain homogenized texture. After homogenization, samples were aged at 500 °C and 550 °C for 1–4.5 h. Fine and/or coarse Ni4Ti3 precipitates disperse homogeneously or heterogeneously in grain interior and at grain
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Effect of C addition on microstructure and mechanical properties of Nb–Si–Ti based alloys Mater. Sci. Eng. A (IF 4.652) Pub Date : 2021-01-15 Qi Wang; Tianyu Zhao; Ruirun Chen; Zhecheng Zhou; Yanqing Su; Hengzhi Fu
To improve the mechanical properties of Nb–Si alloy, the influence of C addition on microstructural evolution and mechanical properties of Nb–16Si–24Ti based alloys is studied. Results show that with the C content increase, the microstructure of Nb–16Si–24Ti-xC transforms from hypoeutectic structure to nearly eutectic structure, and the phase constitutions transform from Nbss + (Nb, Ti)3Si to Nbss + γ-(Nb
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Effects of cryogenic and annealing treatment on microstructure and properties of friction stir welded TA15 joints Mater. Sci. Eng. A (IF 4.652) Pub Date : 2021-01-12 Xianglai Xu; Xueping Ren; Hongliang Hou; Xian Luo
Cryogenic treatment is an effective method that can improve the material's performance by changing the microstructure, such as shrinking the crystal lattice. It is usually used in combination with the annealing treatment of the material. In this article, the effects of cryogenic and annealing treatment on the microstructure and mechanical properties of TA15 friction stir welded joints are investigated
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Balanced development in strength-ductility of ultrahigh-strength aluminum matrix composites by controlled oxidation method Mater. Sci. Eng. A (IF 4.652) Pub Date : 2021-01-16 Xin Zhang; Shufeng Li; Lei Liu; Deng Pan; Lina Gao; Xinghua Ji; Katsuyoshi Kondoh
A new strategy for the fabrication of γ-Al2O3/Al composites by controlled oxidation method was proposed to regulate Al2O3 content. The content of formed nano-sized γ-Al2O3 increased with prolonging the stepwise oxidation time. Accordingly, the tensile strength of 7.86 vol% γ-Al2O3/Al composite gradually raised from 118 MPa (pure Al) to 385 MPa.
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Laser powder bed fusion of ultra-high-strength 420 stainless steel: Microstructure characterization, texture evolution and mechanical properties Mater. Sci. Eng. A (IF 4.652) Pub Date : 2021-01-19 Yuan Tian; Kanwal Chadha; Clodualdo Aranas
In the present research, AISI 420 stainless steel (420SS) samples were fabricated by the laser powder bed fusion (LPBF) process. The microstructure, grain morphology, crystallographic texture, and mechanical properties of the 420SS deposits were evaluated in both as-printed and heat-treated conditions. In the as-printed condition, the melting pool boundaries were formed, and the martensite laths and
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Mechanisms of Creep Deformation in a Rapidly Solidified Al-Fe-V-Si Alloy Mater. Sci. Eng. A (IF 4.652) Pub Date : 2021-01-18 M. Zhang; R.J. Lewis; J.C. Gibeling
Creep experiments on a rapidly solidified Al-8.5 wt% Fe-1.3 wt% V-1.7 wt% Si alloy (FVS0812) suggest that it exhibits similar or superior deformation resistance compared to other high temperature Al alloys. However, aging at 798 K for 200 hours resulted in severe loss of creep strength. Stress reduction results show that FVS0812 exhibits similar creep characteristics to those of other dispersion-strengthened
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Influence of cold rolling on the fatigue crack growth behavior of tungsten Mater. Sci. Eng. A (IF 4.652) Pub Date : 2021-01-18 Simon Pillmeier; Stanislav Zak; Reinhard Pippan; Anton Hohenwarter
The influence of cold rolling on the fatigue crack growth (FCG) behavior of pure tungsten was investigated. For that tungsten sheets with three different thicknesses (2 mm, 1mm and 100 μm) corresponding to different degrees of deformation were selected to prepare compact-tension (CT) and single edge notched tension (SENT) specimens. To account for orientation influences the crack propagation direction
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Micromechanical modeling of cyclic non-closure hysteresis loops of fiber-reinforced ceramic-matrix composites considering variable matrix fragmentation density Mater. Sci. Eng. A (IF 4.652) Pub Date : 2021-01-18 Longbiao Li
Cyclic loading/unloading non-closure hysteresis behavior of fiber-reinforced ceramic-matrix composites (CMCs) are investigated. Variable matrix fragmentation density upon loading/unloading is considered and incorporated into the micromechanical hysteresis loops models. Relationships between non-closure hysteresis loops, inverse tangent modulus, and interface counter slip/new slip ratio are established
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Effect of crystal orientation on inner surface roughness of micro metal tubes in hollow sinking Mater. Sci. Eng. A (IF 4.652) Pub Date : 2021-01-18 Takuma Kishimoto; Saki Suematsu; Hayate Sakaguchi; Kenichi Tashima; Satoshi Kajino; Shiori Gondo; Shinsuke Suzuki
The crystal deformation behavior of the micro tube was investigated to clarify the crystal orientation, which suppressed the development of the inner surface roughness during the hollow sinking. Stainless steel tubes with an outer diameter of 1.50 mm and a wall thickness of 0.045 mm were drawn without an inner tool. The inner surface roughness and crystal orientation were examined using the same measurement
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Effects of Y4Zr3O12 addition on the microstructure and mechanical properties of Fe-15Cr-2W-0.35Ti ODS steels Mater. Sci. Eng. A (IF 4.652) Pub Date : 2021-01-12 You Wu; Haozhi Zhao; Jikang Li; Yuanyuan Zhang; Tong Liu
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Enhanced mechanical properties of dual phase steel via cross rolling and intercritical annealing Mater. Sci. Eng. A (IF 4.652) Pub Date : 2021-01-16 Maryam Soleimani; Hamed Mirzadeh
Cross rolling followed by intercritical annealing was proposed as an alternative route for processing of dual phase (DP) steels, which led to fine recrystallized ferrite grain size and uniformly distributed martensite islands. Accordingly, the processed low-carbon steel showed better strength-ductility trade off, higher hardness, and greater work-hardening exponent.
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Reinforced AZ91D Magnesium Alloy with Thixomolding Process Facilitated Dispersion of Graphene Nanoplatelets and Enhanced Interfacial Interactions Mater. Sci. Eng. A (IF 4.652) Pub Date : 2021-01-18 Liwen Chen; Yuhong Zhao; Muxi Li; Limin Li; Lifeng Hou; Hua Hou
Magnesium matrix nanocomposites reinforced with graphene nanoplatelets (GNPs) additives have long been considered as exciting prospects among nanotechnology applications. Here, the thixomolding process, an extremely efficient dispersing technology, was applied to prepare AZ91D magnesium alloy- GNPs nanocomposites with different GNPs contents (0, 0.1, 0.3, 0.6, 0.9 and 1.2 wt%). The effects of screw
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Effect of strain on microstructural development during uniaxial compression of metastable beta Ti–10V–2Fe–3Al alloy Mater. Sci. Eng. A (IF 4.652) Pub Date : 2020-12-30 R. Naseri; G. Casillas; D.R.G. Mitchell; D.G. Savvakin; M. Ahmed; T. Furuhara; E.V. Pereloma
The effect of strain during uniaxial compression on mechanical behavior of Ti–10V–2Fe–3Al alloy produced by blended elemental powder metallurgy and containing a metastable β matrix with ~0.1 fraction of α phase was investigated. A detailed scanning transmission electron microscopy study revealed the initiation of slip and deformation-induced α′′ martensite and ωD formation at the beginning of plastic
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Deformation mechanism and texture evolution of a low-Ni Cr–Mn–N austenitic stainless steel under bending deformation Mater. Sci. Eng. A (IF 4.652) Pub Date : 2020-12-31 Hamidreza Kamali; Haibo Xie; Hongyun Bi; E. Chang; Haigang Xu; Haifeng Yu; Zhengyi Jiang
The detailed evolution of microstructure and texture of a low-Ni Cr–Mn–N austenitic stainless steel under bending deformation was studied. The effect of austenite grain orientation on the deformation-induced transformation and deformation twinning mechanisms was investigated in selected grains of analogous orientation located near the outer and inner radius, where distinct deformation mechanisms have
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Effects of morphological characteristics on the mechanical behavior of 3D printed ordered pore topological Fe scaffold Mater. Sci. Eng. A (IF 4.652) Pub Date : 2021-01-08 Dipesh Kumar Mishra; Pulak Mohan Pandey
Ordered pore topological structures (OPTS) provide various features such as biodegradability, cell proliferation, and matching mechanical property for bone tissue repair and ingrowth at a single platform. Therefore, the demand for OPTS have shown an unexpected rise in the field of biomedical due to trauma, deformity, and aging population, etc. Moreover, these OPTS have found widespread applications
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Effect of welding on microstructure and mechanical response of X100Q bainitic steel through nanoindentation, tensile, cyclic plasticity and fatigue characterisation Mater. Sci. Eng. A (IF 4.652) Pub Date : 2020-12-30 Ronan J. Devaney; Padraic E. O'Donoghue; Seán B. Leen
This paper presents an experimental characterisation of fatigue at welded connections for the next-generation high-strength low-alloy offshore riser steel, X100Q. An instrumented girth weld is conducted with a parallel programme of physical-thermal simulation (Gleeble) to develop heat affected zone (HAZ) test specimens. X100Q is shown to exhibit superior fatigue performance to the current state of
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Free volume evolution dominated by glass forming ability determining mechanical performance in ZrxTi65-xBe27.5Cu7.5 metallic glasses Mater. Sci. Eng. A (IF 4.652) Pub Date : 2021-01-12 Xiangkui Liu; Jian Kong; Xinxiang Song; Shuai Feng; Zibo Zhang; Yang Yang; Tianchi Wang
The shear deformation and fracture behaviors of ZrxTi65-xBe27.5Cu7.5 metallic glasses (MGs) were systematically investigated in the range x = 20, 25, 30, 35, 40, 45, 50 at% under multi-axial loading mode by small punch test (SPT). Results show that enhanced plasticity can be obtained in MGs with composition ranging from 30 to 45 Zr at%, which is attributed to the large free volume dependent on their
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Engineering mechanical properties by controlling the microstructure of an Fe–Ni–Mn martensitic steel through pre-cold rolling and subsequent heat treatment Mater. Sci. Eng. A (IF 4.652) Pub Date : 2021-01-11 Hamidreza Koohdar; Pouya Hakimipour; Hamid Reza Jafarian; Terence G. Langdon; Mahmoud Nili-Ahmadabadi
Experiments were conducted to examine the effects of prior cold rolling and subsequent heat treatment on the microstructure, phase evolution and mechanical properties of an Fe–10Ni–7Mn martensitic steel. The results show that 70% cold rolling leads to deformation-induced austenite formation in the microstructure and reduces the size of the martensite blocks. Prior cold rolling increases the reversed
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Effects of temperature and loading rate on phase stability and deformation mechanism in metastable V10Cr10Co30FexNi50-x high entropy alloys Mater. Sci. Eng. A (IF 4.652) Pub Date : 2021-01-12 Dong Geun Kim; Min Cheol Jo; Yong Hee Jo; Hyoung Seop Kim; Byeong-Joo Lee; Seok Su Sohn; Sunghak Lee
Room- and cryogenic-temperature compressive properties for the three V10Cr10Co30FexNi50-x (x = 40, 45, 50) high entropy alloys are investigated under quasi-static and dynamic loading conditions. The face-centered cubic (FCC) stability, which is estimated by the calculation of Gibbs free energy difference between FCC and body-centered cubic (BCC) phases, decreases in increasing order of Fe content.
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Effect of strain path on microstructure and mechanical properties of AZ31 magnesium alloy sheets processed by constrained groove pressing Mater. Sci. Eng. A (IF 4.652) Pub Date : 2021-01-17 Zongshen Wang; Tao Wang; Yanjin Guan; Lihua Zhu
Constrained groove pressing (CGP) is a novel severe plastic deformation (SPD) method suitable for fabricating ultra-fine grained (UFG) sheet metals. In this work, two passes of CGP were conducted to AZ31 magnesium alloy sheets at 523 K, and three routes including traditional CGP, 180° cross-CGP and 90° cross-CGP were employed to investigate the effects of pressing number and strain path on microstructure
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Effects of Hot Processes on Microstructure Evolution and Tensile Properties of FGH4096 Ni-based Superalloy Processed by Laser Powder Bed Fusion Mater. Sci. Eng. A (IF 4.652) Pub Date : 2021-01-16 Zhibo Hao; Tian Tian; Xinggang Li; Yuhe Huang; Shiqing Peng; Qiang Zhu; Changchun Ge
Hot Isostatic Pressing (HIP) is one of the most important manufacturing processes to improve the performance of powder metallurgy nickel-based superalloys produced by Laser Powder Bed Fusion (LPBF), which can effectively reduce the pores and cracks in the LPBF alloys. However, there are limited studies on the effects of tuning HIP parameters on the LPBF alloys microstructure and mechanical performance
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Effect of texture on shape memory property of Ti–16Nb high temperature shape memory alloy Mater. Sci. Eng. A (IF 4.652) Pub Date : 2021-01-16 Bin Sun; Kuishan Sun; Xianglong Meng; Zhiyong Gao; Wei Cai
Microstructure evolution, texture and shape memory properties of the martensitic Ti−16Nb (at.%) alloy subjected to cold rolling and post deformation annealing were investigated by transmission electron microscopy (TEM), electron backscattered diffraction (EBSD) and Schmid factor analyses. The present alloy deforms mainly by twinning of the {111}o type I or its conjugate, the 211o type II twins along
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Effect of Cu addition on the microstructure and mechanical properties of In-Sn-based low-temperature alloy Mater. Sci. Eng. A (IF 4.652) Pub Date : 2021-01-16 D.U.Y. Le Han; Yu-An Shen; Siliang He; Hiroshi Nishikawa
The In-48Sn eutectic alloy has emerged as a favorable solder for flexible electronic devices, owing to its low operating temperature. However, the low strength of In-48Sn eutectic alloy compared with that of other commercial solders affects the product life and limits its use in the device applications. Herein, we studied the effects of xCu addition (x = 1.0, 2.0, and 8.0 wt. %) on melting temperature
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Investigation of the main strengthening mechanism of carbon nanotube reinforced aluminum composites Mater. Sci. Eng. A (IF 4.652) Pub Date : 2021-01-16 Kun Xie; Guopeng Zhang; Hai Huang; Jianjian Zhang; Zhongxia Liu; Bin Cai
The effects of carbon nanotube aspect ratio (R) on mechanical properties of CNT/Al composites containing 0-2.0 wt.% CNTs are studied. The optimum carbon nanotube (CNT) reinforced aluminum (Al) composites are fabricated at 580 oC for 1 h under 60 MPa, and subsequently hot extruded at 480 oC. CNT addition within 0.5 wt.% can increase the strength significantly without plasticity loss, which overcomes
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Optimizing the mechanical properties of Al–Si alloys through friction stir processing and rolling Mater. Sci. Eng. A (IF 4.652) Pub Date : 2021-01-16 W. Cheng; C.Y. Liu; Z.J. Ge
In this study, hypoeutectic and eutectic Al–Si alloys were processed through rolling and friction stir processing (FSP), and the effects of deformation routes on the microstructures and mechanical properties of Al–Si alloys were studied. FSP led to the fragmentation and uniform distribution of Si phases in the Al matrix and then eliminated the preferential crack propagation channels of Al–Si alloys
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Investigation on the size and distribution effects of O phase on fracture properties of Ti2AlNb superalloy by using image-based crystal plasticity modeling Mater. Sci. Eng. A (IF 4.652) Pub Date : 2021-01-16 Yanqi Fu; Manqian Lv; Qing Zhao; Haiming Zhang; Zhenshan Cui
Ti2AlNb superalloy consisting of O-phase and B-phase often exhibits deformation heterogeneity and incompatibility due to the mechanical characteristics of phases. To study the size and distribution effects of the O-phase on the fracture properties of Ti2AlNb superalloy, three types of material with different O-phase sizes and distributions were prepared through heat treatments, and the tensile properties
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Crack Initiation of an Industrial 7XXX Aluminum Alloy in Humid Air analyzed via Slow Strain Rate Testing and Constant Displacement Testing Mater. Sci. Eng. A (IF 4.652) Pub Date : 2021-01-16 Elisabeth Schwarzenböck; Levke Wiehler; Torsten Heidenblut; Theo Hack; Christian Engel; Hans Jürgen Maier
The mechanical response of a commercial aluminum alloy, AA7085, was examined using slow strain rate testing in dry air and humid air at 70 °C. These tests and fractographic observations confirmed that the alloy suffered from hydrogen embrittlement when exposed to humid air. Crack initiation was studied in both environments to evaluate the effect of humidity on crack nucleation. Observations from both
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Effect of the Bonding Temperature on the Microstructure and Mechanical Properties of the Diffusion-bonded Joints of the Zr705 Alloy Mater. Sci. Eng. A (IF 4.652) Pub Date : 2021-01-16 Sheng Zeng; Guoqiang You; Fanjin Yao; Jingchuan Luo; Xin Tong
( ) Research on the diffusion bonding of ( ) similar joints of zirconium (Zr) alloys is limited as compared to that on the diffusion bonding of ( ) dissimilar joints. The similar Zr alloys are difficult to bond together owing to its high melting point; however, an added interlayer can solve this problem. This study demonstrated the successful vacuum diffusion bonding of the Zr-2.5Nb (Zr705) alloy with
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Evolution of texture, microstructure, tensile strength and corrosion properties of annealed Al–Mg–Sc–Zr alloys Mater. Sci. Eng. A (IF 4.652) Pub Date : 2020-12-17 Hongjie Fang; Hui Liu; Yang Yan; Xier Luo; Xiangchun Xu; Xin Chu; Yujiao Lu; Kun Yu; Diangang Wang
The microstructure, texture, tensile strength, and corrosion behavior of Al–Mg–Sc–Zr alloy at different annealing temperatures were investigated using SEM, TEM, XRD, and dual potentiostat techniques. Results show that in the process of alloy homogenization annealing, the Al–Mg–Sc–Zr alloy is able to precipitate spherical particles of Al3(Sc, Zr) with a diameter of about 10 nm and a lattice constant
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Achieving single-pass high-reduction rolling and enhanced mechanical properties of AZ91 alloy by RD-ECAP pre-processing Mater. Sci. Eng. A (IF 4.652) Pub Date : 2021-01-12 Yuhua Li; Yaqing Jiang; Qiong Xu; Aibin Ma; Jinghua Jiang; Huan Liu; Yuchun Yuan; Chao Qiu
It is widely recognized that rolling Mg alloys is difficult due to their poor ductility. Conventional rolling of Mg alloys often needs to be conducted at high temperatures with multi-pass small thickness reduction, and the strong basal texture often leads to poor ductility and plate cracking. Herein, we conducted a single-pass high-reduction rolling (SPHRR) on AZ91 alloy after pre-homogenization (PH)
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Dynamic recrystallization mechanisms of 2195 aluminum alloy during medium/high temperature compression deformation Mater. Sci. Eng. A (IF 4.652) Pub Date : 2021-01-07 Jingjing Zhang; Youping Yi; Shiquan Huang; Xianchang Mao; Hailin He; Jiaguo Tang; Wanfu Guo; Fei Dong
The 2195 aluminum alloy has been widely utilized in the aerospace field, of which dynamic recrystallization microstructures have a substantial effect on the mechanical properties of aerospace parts. In this study, 2195 aluminum alloy was compressed at 300–520 °C using a Gleeble 3500-GTC thermo-mechanical testing system. The discontinuous dynamic recrystallization (DDRX) and continuous dynamic recrystallization
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Effect of anisotropic grain growth on improving the bonding strength of <111>-oriented nanotwinned copper films Mater. Sci. Eng. A (IF 4.652) Pub Date : 2021-01-07 Shih-Yang Chang; Yi-Cheng Chu; K.N. Tu; Chih Chen
To overcome the scale-down dilemma of solder-based microbumps, copper-to-copper direct bonding has emerged to be one of the most promising approaches to replace solder joints in the high-end packaging technology. However, the bonding interface remains as bonding temperature is below 300 °C. We use highly <111>-orientated nanotwinned Cu films in the direct bonding due to its ability to transform into
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Nitrogen-induced hardening in an austenitic CrFeMnNi high-entropy alloy (HEA) Mater. Sci. Eng. A (IF 4.652) Pub Date : 2020-12-31 Mathieu Traversier; Pierre Mestre-Rinn; Nathalie Peillon; Emmanuel Rigal; Xavier Boulnat; Franck Tancret; Jean Dhers; Anna Fraczkiewicz
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Microstructure refinement and strengthening mechanisms of network structured TiBw/Ti6Al4V composites by TIG remelting Mater. Sci. Eng. A (IF 4.652) Pub Date : 2021-01-07 Ming Ji; Lujun Huang; Qi An; Yang Bao; Xiping Cui; Yang Jiao; Lin Geng
In order to further strengthen TiB whiskers reinforced Ti6Al4V (TiBw/Ti6Al4V) composites with a network microstructure, tungsten inert gas (TIG) remelting was performed on the composites with different reinforcement volume fractions to tune microstructure. The results showed that the size of network unit and TiB whisker reinforcement of the composites were significantly refined from 150 μm to 20 μm
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Microstructural evolution and mechanical property changes of a new nitrogen-alloyed Cr-Mo-V hot-working die steel during tempering Mater. Sci. Eng. A (IF 4.652) Pub Date : 2021-01-12 Jinbo Gu; Jingyuan Li; Jun Yanagimoto; Wang Li; Lihao Li
In-depth understanding of the impact mechanism of nitrogen on tempering behavior of hot-working die steel is still limited. In present work, the microstructural evolution and mechanical property change of new nitrogen-alloyed Cr-Mo-V hot-working die steel during long-term tempering were investigated by scanning electron microscopy (SEM), high-resolution transmission electron microscopy (HRTEM), eletron
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Effect of aging temperature on the precipitation behavior and mechanical properties of Fe–Cr–Ni maraging stainless steel Mater. Sci. Eng. A (IF 4.652) Pub Date : 2021-01-12 C. Zhang; C. Wang; S.L. Zhang; Y.L. Ding; Q.L. Ge; J. Su
Aging is an important heat treatment process for maraging stainless steel. During aging, the interaction between intermetallic compounds and dislocations has a significant impact on the mechanical properties of the material. In this article, the effect of aging temperature on the precipitation behavior and mechanical properties of Fe–Cr–Ni maraging stainless steel was studied by means of a three-dimensional
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Improvement in Tensile Strength and Ductility of Carbon Nanotube Reinforced Aluminium Nanocomposites by Modification of Interfacial Properties Mater. Sci. Eng. A (IF 4.652) Pub Date : 2021-01-12 Pramod Rakt Patel; Sumit Sharma; S.K. Tiwari; Saurabh Kango
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Processing-microstructure-property correlations for temperature-controlled friction stir welding of 304L SS plates Mater. Sci. Eng. A (IF 4.652) Pub Date : 2020-12-31 Madhumanti Bhattacharyya; Arnab Kundu; Krishnan S. Raja; Jens Darsell; Saumyadeep Jana; Indrajit Charit
Friction stir welding (FSW) is being considered as a potential repair welding technique for various engineering applications. In this study, an effort was made to explore the correlation between microstructure and mechanical properties in FSWed 304L stainless steel (SS) plates. An in-house developed weld temperature control algorithm was used during FSW of 304L SS plates. FSW was performed at two different
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Microstructure and mechanical behaviors of 6061 Al matrix hybrid composites reinforced with SiC and stainless steel particles Mater. Sci. Eng. A (IF 4.652) Pub Date : 2021-01-06 Sisi Tang; Songying Shao; Haiyang Liu; Fulin Jiang; Dingfa Fu; Hui Zhang; Jie Teng
Hybrid aluminum matrix composites are appealing in the aviation, aerospace and automotive industries and have the potential to substitute single reinforced composites due to their enhanced comprehensive properties. In the present work, 6061 Al matrix composite hybrids reinforced with SiC and stainless steel particles were prepared to improve the strength and ductility by the powder metallurgy method
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Microstructure and properties of aluminium alloy 6082 formed by the Hot Form Quench process Mater. Sci. Eng. A (IF 4.652) Pub Date : 2021-01-07 P. Hidalgo-Manrique; S. Cao; H.R. Shercliff; R.D. Hunt; J.D. Robson
During a process development trial, two identical structural automotive parts were formed from a rolled sheet of commercial 6082 Al alloy by Hot Form Quench (HFQ). The rapid transitional contact between the sheet and the die set during die closing imposed a range of complex cooling histories on different locations in the parts. After in-die quenching, one HFQ part was naturally aged at room temperature
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Dynamic precipitation of σ-phase and element partitioning in equiatomic CoCrFeMnNi high-entropy alloy Mater. Sci. Eng. A (IF 4.652) Pub Date : 2021-01-05 Unhae Lee; Boris Straumal; Nokeun Park
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Effects of precipitate on the slip activity and plastic heterogeneity of Mg-11Y-5Gd-2Zn-0.5Zr (wt. %) during room temperature compression Mater. Sci. Eng. A (IF 4.652) Pub Date : 2021-01-04 R. Ni; S.J. Ma; L.J. Long; J. Zheng; H. Zhou; Q.D. Wang; D.D. Yin
To understand the effects of precipitate on the deformation mechanisms and plastic heterogeneity of a cast Mg–11Y-5Gd-2Zn-0.5Zr (wt.%) alloy, quantitative comparison studies were performed on the solid solution (T4) and peak-aged (T6) samples during room temperature compression based on slip trace analysis and electron backscatter diffraction (EBSD) analysis. At 10% plastic strain: no twins were observed
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Correlation of dynamic compressive properties, adiabatic shear banding, and ballistic performance of high-strength 2139 and 7056 aluminum alloys Mater. Sci. Eng. A (IF 4.652) Pub Date : 2021-01-06 Selim Kim; Min Cheol Jo; Tae Won Park; Jinhee Ham; Seok Su Sohn; Sunghak Lee
In this study, laboratory-scale Split Hopkinson pressure bar (SHPB) tests were conducted on commercial armor plates composed of 2139 and 7056 Al alloys to investigate their dynamic compressive properties in relation to adiabatic shear band (ASB) formation. The results were then correlated to those of the ballistic performance as measured from V50 ballistic impact tests. In the SHPB tests, the 2139
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Effects of the β1′ precipitates on mechanical and damping properties of ZK60 magnesium alloy Mater. Sci. Eng. A (IF 4.652) Pub Date : 2020-12-30 Xiongpeng Zhou; Hongge Yan; Jihua Chen; Weijun Xia; Bin Su; Xinyu Li; Wensen Huang; Min Song
A new approach to improve the damping capacity and mechanical properties of ZK60 magnesium alloy at the same time is discovered by introducing the β1′ (MgZn2) precipitates. The β1′ precipitates are formed in the alloy experienced solution treatment and subsequent aging at 140 °C for 18 h in this study. The synchronous improvement in mechanical and damping properties of the alloy is mainly due to the
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Activation of slip and enhanced ductility in as-extruded Mg-Gd-Y-Nd alloys through Si addition Mater. Sci. Eng. A (IF 4.652) Pub Date : 2021-01-06 Liqun Guan; Yunlai Deng; An Luo; Xiaobin Guo; Changping Tang
Low-cost Si was added to Mg-8Gd-4Y-1Nd alloys to improve their ductility. With the Si increased from 0 to 1.0 wt %, the elongation increased from 8.7% to 17.1% for as-extruded Mg-8Gd-4Y-1Nd alloys. Microstructures results indicated that the formation of GdSi and Y5Si3 intermetallic phases increased significantly with the Si addition, which was shown to promote the random orientation of grain structures
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Revealing the relationship between microstructures, textures, and mechanical behaviors of cold-rolled Al0.1CoCrFeNi high-entropy alloys Mater. Sci. Eng. A (IF 4.652) Pub Date : 2021-01-07 Jinxiong Hou; Junwei Qiao; Junhe Lian; Peter K. Liaw
Here we reveal and discuss the relationship among microstructures, textures, and mechanical behaviors of Al0.1CoCrFeNi high-entropy alloys (HEAs) after cold rolling and annealing. The initially coarsen grains display profuse lamellar-structured slip bands upon cold rolling to 50% reduction with mostly extending vertically to the rolling direction. Meanwhile, cold rolling facilitates the evolutions
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Influence of annealing treatment on the microstructure, mechanical performance and magnetic susceptibility of low magnetic Zr-1Mo parts manufactured via laser additive manufacturing Mater. Sci. Eng. A (IF 4.652) Pub Date : 2021-01-08 Xiaohao Sun; Debao Liu; Minfang Chen; Weiwei Zhou; Naoyuki Nomura; Takao Hanawa
In recent years, a low magnetic and fully dense Zr-1Mo(wt%) part was successfully manufactured via the laser powder bed fusion(L-PBF) process, which shows the great potential as metallic biomaterials under the magnetic resonance imaging(MRI) environment. However, due to the high cooling rate after laser incident during the L-PBF process, the as-fabricated Zr-1Mo part consists of a non-equilibrium α’
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High strength-high ductility medium Mn steel obtained through CALPHAD based alloy design and thermomechanical processing Mater. Sci. Eng. A (IF 4.652) Pub Date : 2021-01-07 Achintya Kumar Patra; C.N. Athreya; Sumantra Mandal; K.C. Hari Kumar; V. Subramanya Sarma
There is considerable research interest in developing medium Mn steels as part of the 3rd generation of advanced high strength steels, mainly due to the possibility to achieve high tensile strength-high ductility combination at an affordable cost. In the present work, we have designed a steel chemistry and its thermomechanical processing route based on a computational approach based on CALPHAD with
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The defining role of phosphorous on microstructure, nanohardness and thermal stability of pulsed electrodeposited nanocrystalline nickel-phosphorous alloys Mater. Sci. Eng. A (IF 4.652) Pub Date : 2021-01-04 Haripria T. Padmaganesan; Swastika Banthia; Vishwas Dihari; Sumit Chhangani; M.J.N.V. Prasad
Free-standing nanocrystalline (NC) nickel-phosphorous (Ni–P) alloy foils with P content in the range of 0.2–5.0 wt percent are synthesized by pulsed electrodeposition technique. The aim of the present study is to evaluate the effect of P content on the hardness and microstructural evolution in Ni–P alloys during both electrodeposition and thermal treatment. The microstructure, hardness and thermal
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Characterization of precipitation in gradient Inconel 718 superalloy Mater. Sci. Eng. A (IF 4.652) Pub Date : 2020-12-28 Jie Ding; S. Xue; Z. Shang; Jin Li; Y. Zhang; R. Su; T. Niu; H. Wang; X. Zhang
Inconel 718 (IN718) superalloy is a well-established material for the application of aircraft engine and power generator due to its excellent performance at high temperatures. The outstanding mechanical properties of IN718 are largely determined by the precipitates. Here, we investigated the precipitation behaviors and the corresponding mechanical properties of the heat-treated gradient IN718 alloy
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Effects of warm saddle forging deformation on the reduction of second-phase particles and control of the three-dimensional mechanical properties of 2219 aluminum alloy rings Mater. Sci. Eng. A (IF 4.652) Pub Date : 2021-01-04 Xianchang Mao; Youping Yi; Shiquan Huang; Wanfu Guo; Hailin He; Jirong Que
Severely segregated Al2Cu coarse second-phase particles (CSPPs) and uneven mechanical properties are the main problems in the manufacturing process of 2219 aluminum alloy large rings. A new method for the control of the three-dimensional mechanical properties (TDMPs) of the rings is proposed in the present study. The evolution law of the Al2Cu particles and the regulation mechanism of the TDMPs were
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Microstructure and mechanical properties of the brazed region in the AlCoCrFeNi high-entropy alloy and FGH98 superalloy joint Mater. Sci. Eng. A (IF 4.652) Pub Date : 2020-12-28 Shiwei Li; Jinglong Li; Junmiao Shi; Yajie Du; Yu Peng; Feng Jin; Jiangtao Xiong; Fusheng Zhang
In this study, brazing of Al0.3CoCrFeNi high-entropy alloy to FGH98 superalloy was achieved using a BNi-2 filler metal. The microstructure of the Al0.3CoCrFeNi/FGH98 joint was examined, and mechanical properties of the joints brazed at different brazing temperatures were evaluated. During the brazing process, boron diffused from the filler alloy into the Al0.3CoCrFeNi substrate, and mainly reacted with
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Optimization of postweld tempering pulse parameters for maximum load bearing and failure energy absorption in dual phase (DP590) steel resistance spot welds Mater. Sci. Eng. A (IF 4.652) Pub Date : 2020-12-25 Imtiaz Ali Soomro; Srinivasa Rao Pedapati; Mokhtar Awang
Resistance spot welds of dual phase (DP) steels are prone to low fracture toughness due to the formation of brittle martensitic structure in the fusion zone (FZ). In-process tempering of martensite via applying second pulse current is considered a new pathway to improve mechanical performance of the welds. The success of in-process tempering depends upon precise controlling the amount of heat input
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Improved strength and ductility balance of medium-carbon steel with chromium and titanium fabricated by friction stir welding process Mater. Sci. Eng. A (IF 4.652) Pub Date : 2021-01-04 Chun Cheng; Kota Kadoi; Hidetoshi Fujii; Kohsaku Ushioda; Hiroshige Inoue
To investigate the effect of alloying elements on the microstructure and mechanical properties of medium-carbon steel weldments, 0.4% carbon steels with different chromium and titanium contents were fabricated by melting and hot-rolling for friction stir welding (FSW). The microstructures in the stir zones of friction stir welded (FSWed) medium-carbon steels without chromium, with 1% chromium and 4%
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