-
Effect of phase composition on density and structure of Al–Ni–Co–Cu–Zr high-entropy alloys in solid and liquid states Intermetallics (IF 4.4) Pub Date : 2024-04-21 B.A. Rusanov, S.A. Petrova, E.V. Sterkhov, A.I. Rusanova, V.A. Bykov, V.E. Sidorov
Volumetric characteristics of high-entropy alloys (HEAs) are among the main ones when considering possible practical applications of these materials. Low specific gravity is an important parameter providing the use of these alloys in industry. Density of AlNiCoCuZr HEAs with different component ratios has been experimentally investigated in the present work in a wide temperature range, including liquid
-
Effect of cooling rate on the crystallization behaviors of Mg65Zn30Ca5 metallic glass composites Intermetallics (IF 4.4) Pub Date : 2024-04-19 Chenhui Wang, Jürn W.P. Schmelzer, Luojia Zhang, Li Zhang, Lilin Wang, Christoph Schick, Yulai Gao, Bingge Zhao
Metallic glass composites (MGCs) have attracted considerable attention attributing to their outstanding properties. Compared with metallic glasses, MGCs show different crystallization behaviors attributed to the embedded crystalline phases. In this work, in situ preparation of MgZnCa MGCs is realized by using the differential fast scanning calorimeter. With the increase in cooling rate, the fraction
-
Effect of heat treatment on the microstructure and nanoindentation behavior of AlCoCrFeNi high entropy alloy Intermetallics (IF 4.4) Pub Date : 2024-04-18 Genfeng Shang, Zhen-zhi Liu, Jiayi Fan, Xiao-Gang Lu
In the present work, the effect of annealing temperature on the phase evolution, morphology, and nanoindentation behavior of the equiatomic AlCoCrFeNi high entropy alloy (HEA) were investigated, and the correlation between the microstructure and nanoindentation behavior in the dendrite core (DC) and inter-dendrite (ID) regions was revealed. The DC and ID regions in the as-cast alloy are composed of
-
Corrosion behaviors of W-doped laser-cladded high-entropy alloy of AlCoCrFeNi in a simulated sulfur-containing seawater environment Intermetallics (IF 4.4) Pub Date : 2024-04-18 Yang Zhao, Zhikai Zhu, Wenqing Shi, Jiang Huang
The localized corrosion in a simulated seawater environment is related to sulfide, and few studies have investigated the corrosion behaviors of laser-cladded AlCoCrFeNi high-entropy alloy (HEA) systems in a simulated sulfur-containing seawater environment. Corrosion behaviors of HEA/W (x = 0, 5, and 15 wt%) coatings have been worked out by potentiodynamic polarization, electrochemical impedance spectroscopy
-
The mechanism of ductile-brittle transition in carbon alloyed Fe40Mn40Co10Cr10 medium entropy alloys Intermetallics (IF 4.4) Pub Date : 2024-04-17 Liangbin Chen, Zhongyue Yang, Yaohui Li, Yanpu Chao, Yuhang Shi, Ke Tang, Ran Wei, Feng Jiang
In this work, the uniaxial tensile tests were conducted on FeMnCoCr, (FeMnCoCr)C, (FeMnCoCr)C and 0.4 wt% Ti doped (FeMnCoCr)C at 298K, 159K and 77K. Meanwhile, the corresponding deformation microstructures as well as the variations of critical shear stress () and critical normal stress () were analyzed to unveil the mechanism of ductile-brittle transition (DBT) behavior in carbon alloyed face-centered
-
Ultrasonic elliptical vibratory nanocutting mechanisms of Cu50Zr50 amorphous alloy: A molecular dynamics simulation Intermetallics (IF 4.4) Pub Date : 2024-04-17 Xianjun Kong, Xinbo Hu, Minghai Wang, Yaohui Zheng
The mechanical properties of amorphous alloy have been proven to be unique and have a great application value. In this study, the deformation mechanism of CuZr amorphous alloy during ultrasonic elliptical vibration cutting (UEVC) was revealed via molecular dynamics simulation in detail. It is founded that the amorphous alloy was more easily removed via repeated extrusion during UEVC. The reason is
-
Intermetallic phase evolution and strengthening mechanisms of the titanium and stainless steel lap joints welded by interrupted pulsed arc welding Intermetallics (IF 4.4) Pub Date : 2024-04-13 Sihua Liu, Zhi Cheng, Yanqiu Li, Shiming Huang, Jing Wen, Chunhuan Chen, Ruiming Ren
The study is focused on analyzing the intermetallic phase evolution and strengthening mechanisms of the titanium alloy and stainless steel (Ti-SS) seam-welded joints using interrupted pulsed arc welding (IPAW). The precise adjustment of welding parameters for the IPAW technique allowed for the successful creation of two different joining modes for Ti-SS joints: contact reactive brazing and fusion modes
-
Microstructure and mechanical properties of an additively manufactured WMoTaNbNiTi refractory high-entropy alloy Intermetallics (IF 4.4) Pub Date : 2024-04-10 Bang Xiao, Fangzhou Xing, Wenpeng Jia, Jian Wang, Ming Wei, Lian Zhou
WMoTaNb refractory high-entropy alloy (RHEA) is pronounced for its brilliant thermal resistance at 1600 °C, which makes it a candidate with vast potential for elevated temperature service except for its difficulty in room temperature machining before industrialization. Additive manufacturing with its complex shape forming and flexible design abilities, can intensively meet the future industrial requirements
-
Improved creep resistance of Mo-V-Si-B alloys with a density below 8 g/cm³ Intermetallics (IF 4.4) Pub Date : 2024-04-09 Julia Becker, Manja Krüger
Improving the efficiency of turbines for power plants and aircraft engines is an increasingly important research subject. Ternary Mo-Si-B alloys, consisting of a molybdenum solid solution (Mo) phase and two intermetallic phases MoSiB (T2) and MoSi, are able to combine balanced room temperature fracture toughness, high temperature creep strength and good oxidation performance. However, the high density
-
Hot deformation behavior and microstructure evolution of a novel Mn-containing HEA Intermetallics (IF 4.4) Pub Date : 2024-04-08 By Yanxin Wu, Tianxiang Wang, Yun Zhang, Shiwei Tian, Chengyue Xiong, Haitao Jiang
-
Microstructures, transformation temperatures and superelastic properties of the rapidly solidified (TiZrHf)50Ni25Co10Cu15 HESMAs Intermetallics (IF 4.4) Pub Date : 2024-04-07 Izaz Ur Rehman, Yeon-wook Kim, Shuanglei Li, Tae-Hyun Nam
In this study, the effects of the rapid solidification process on microstructures, transformation behaviors and superelastic properties of the multi-component (TiZrHf)NiCoCu (at%) high-entropy shape memory alloy (HESMA) were investigated. The as-spun (TiZrHf)NiCoCu fibers were prepared by a rapid solidification process. The solution-treated (TiZrHf)NiCoCu alloy bulk specimen consisted of a (NiCoCu)-rich
-
Characterization of structural and mechanical properties of HfNbTaTiZr refractory high entropy alloy after gas nitriding Intermetallics (IF 4.4) Pub Date : 2024-04-06 Yunus Alphan, Mertcan Kaba, Amir Motallebzadeh, Huseyin Cimenoglu
This study was initiated to improve surface hardness and wear resistance of a HfNbTaTiZr refractory high entropy alloy (RHEA) by gas nitriding at a medium temperature (600 °C) for 3 h. Structural characterizations conducted by X-ray diffractometer (XRD), X-ray photoelectron spectroscopy (XPS) and energy dispersive spectroscopy (EDS) equipped scanning electron microscope (SEM) revealed that nitriding
-
High-temperature oxidation and diffusion studies on selected Al–Cr–Fe–Ni high-entropy alloys for potential application in thermal barrier coatings Intermetallics (IF 4.4) Pub Date : 2024-04-05 Richard Gawel, Łukasz Rogal, Grzegorz Smoła, Zbigniew Grzesik
In this work, the properties of two high-entropy alloys (HEAs) AlCrFeNi and AlCrFeNi (at.%) were compared for potential application as bond coats in thermal barrier coatings (TBCs). For this reason, both their oxidation resistance under isothermal and thermal shock conditions, as well as diffusion phenomena occurring at the substrate-HEA diffusion couple interface, were investigated. It was determined
-
Micro-structural damage and mechanical response of TiAl alloy with lamellar microstructure during thermal shock progress Intermetallics (IF 4.4) Pub Date : 2024-04-03 Yarong Wang, Yuqing Li, Yonghao Yu, Hongchao Kou, Jinshan Li
Considering the service safety for TiAl alloy under thermal shock, the effect of thermal shock temperature and cycles on micro-structural degeneration and mechanical properties were studied. The results show that the vertical decomposition of α→β phase transition occurs in α lamellae if the single thermal shock temperature increases to 1000 °C or the thermal shock cycle increases to 10 times at 900 °C
-
Microstructure and properties of FeCoNi1.5CuB0.5Y0.2 high-entropy alloy subject to high magnetic field treatment Intermetallics (IF 4.4) Pub Date : 2024-04-03 K. Dong, H.M. Wang, G.R. Li, P.A. Xu, Y.F. Zhang
FeCoNiCuBY high-entropy alloys (HEAs) were prepared through cold isostatic pressing and microwave sintering, followed by treatment with high-pulsed magnetic field treatment. This study investigated the structure, microstructure, and mechanical properties of HEAs under different magnetic field processing parameters (magnetic induction intensity, number of pulses). The results indicated that the application
-
Effect of titanium on the structural, mechanical and surface properties of CoCrFeMnNiTix high entropy alloy fabricated by selective laser melting Intermetallics (IF 4.4) Pub Date : 2024-04-02 Caner Bulut, Fatih Yıldız, Temel Varol, Tevfik Oğuzhan Ergüder
-
Martensitic transformation and inverse magnetocaloric effect in Ni-Mn-Ga-Co-Gd microwires Intermetallics (IF 4.4) Pub Date : 2024-04-01 Shiwei Fu, Jiajie Gao, Kunyu Wang, Lin Ma, Jie Zhu
Ni–Mn-Ga-Co-Gd microwires were fabricated by the glass-coated melt spinning method, resulting in a bamboo-grained structure. In this paper, the magnetocaloric effect of Ni–Mn-Ga-Co-Gd microwires is mainly investigated, which is represented by the isothermal magnetic entropy change calculated using Maxwell equation. Specifically, NiMnGaCoGd microwires exhibit maximum entropy change of 11.09 J/kg·K under
-
A comparative study of magnetic behaviours in bulk and ribbon samples of PrMn2Ge2 compound Intermetallics (IF 4.4) Pub Date : 2024-03-29 J.Y. Li, H.Y. Hao, W.D. Hutchison, C.C. Hu, F. Su, Y.F. Xue, Q.F. Gu, S.J. Campbell, W.Q. Wang, Z.X. Cheng, J.L. Wang
The magnetic properties of PrMnGe samples in both the as-cast bulk and melt-spun ribbon forms have been investigated in detail by a comprehensive set of x-ray and neutron powder diffraction, magnetic and heat capacity measurements and corresponding sets of data analyses. Thermal expansion measurements indicate the presence of magnetoelastic coupling effects around all transition temperatures in the
-
Comparative analysis of nanoindentation-induced incipient deformation of zirconium-based bulk metallic glass in various structural states Intermetallics (IF 4.4) Pub Date : 2024-03-29 Silvia Pomes, Nozomu Adachi, Masato Wakeda, Takahito Ohmura
The incipient plastic deformation behaviour of as-cast and annealed samples of ZrCuAl (atom %) bulk metallic glass was investigated by nanoindentation. A validated load-over-displacement versus displacement plot showed the existence of a precursor event to incipient plasticity in both samples. The activation stress remained consistent in both samples, indicating that the event corresponds to local
-
Deformation mode transition induced by notch sensitivity in metallic glass Intermetallics (IF 4.4) Pub Date : 2024-03-28 J.X. Zhao, J. He, F.F. Wu, Y.Y. Zhang
-
Investigation of the formation mechanism between β-NiAl and C14-Laves phases in laser additive manufacturing of nickel-based superalloy Intermetallics (IF 4.4) Pub Date : 2024-03-27 Zhipeng Zhang, Jide Liu, Chongwei Zhu, Xinguang Wang, Yizhou Zhou, Jianjun Wang, Jinguo Li
-
Effects of TiC addition on the interface stability, microstructure, and mechanical properties of IN718 fabricated by laser direct metal deposition: A combined experimental, DFT and MD study Intermetallics (IF 4.4) Pub Date : 2024-03-25 Rui Li, Bin Han, Zhandong Wang, Kai Zhao, Kedong Bi, Guifang Sun
-
Creep behavior and creep-oxidation interaction of selective electron beam melted Ti–48Al–2Cr–2Nb alloy at different temperatures Intermetallics (IF 4.4) Pub Date : 2024-03-25 Shulong Xiao, Zhenquan Liang, Hangyu Yue, Qingchao Li, Xinyi Li, Yunfei Zheng, Dazhao Chi, Lijuan Xu, Xiang Xue, Jing Tian
In this work, creep behavior and creep-oxidation interaction behavior of Ti–48Al–2Cr–2Nb alloy fabricated by selective electron beam melting at different temperatures were investigated in detail. This alloy exhibits a near-γ microstructure composed of coarse/fine mixed equiaxed grains. Creep test results show that creep behavior of this alloy is sensitive to temperature. This is mainly manifested in
-
Ultralow friction and low wear behavior of in-situ formed NiTiO3 from 60NiTi alloy at 350 °C Intermetallics (IF 4.4) Pub Date : 2024-03-23 Zeming Pang, Qunfeng Zeng, Zekun Ning, Wanjun He, Zhao Wang, Jiahe Wang, Lei Li
Self-lubricating materials of NiO–TiO binary system have been rarely studied. In this paper, the friction experiments between 60NiTi discs and SiN balls under dry friction conditions were carried out in ambient air from room temperature (RT) to 400 °C. The mechanical properties of each phase of 60NiTi after the friction experiments at different temperatures are measured by nanoindentation tests. The
-
Cavitation erosion behavior of HVAF-sprayed Cu-based glassy composite coatings in NaCl solution Intermetallics (IF 4.4) Pub Date : 2024-03-21 Yujun Wang, Yuping Wu, Sheng Hong, Jiangbo Cheng, Shuaishuai Zhu
Three Cu-based glassy composite coatings (C1, C2, C3) were fabricated using high velocity air-fuel (HVAF) spraying. These coatings were investigated through cavitation testing and electrochemical analysis. The analysis revealed a glassy phase, CuNi, and tetragonal-ZrO within these coatings. The glassy phase in C1, C2, and C3 was 50.6%, 55.4%, and 48.9%. C1 exhibited superior mechanical properties due
-
Crystal-to-amorphous phase transformation in ternary shape memory alloys Intermetallics (IF 4.4) Pub Date : 2024-03-18 Hamed Shahmir, Mohammadreza Hosseinzadeh, Hyoung Seop Kim, Mahmoud Nili-Ahmadabadi
This systematic study evaluates the role of important factors in crystal-to-amorphous phase transformation during severe plastic deformation in ternary shape memory alloys. Experiments coupled with thermodynamic calculations to obtain comprehensive interpretation on the amorphization in ternary shape memory alloys. Equiatomic binary NiTi together with ternary Ni–45Ti–5Hf and Ti–45Ni–5Cu (at%) alloys
-
Microstructure and room/high-temperature tensile properties of γ-TiAlNb intermetallic compound subjected to heat treatment Intermetallics (IF 4.4) Pub Date : 2024-03-18 Liangliang Li, Yongliang Zhang, Xin Pan, Jianwei Mu, Pengfei Li, Zhifeng Liu
This study aims to investigate the influence of high-temperature heat treatment on the microstructure and mechanical properties of titanium aluminide niobium (γ-TiAlNb) intermetallic compounds. Systematic experiments revealed that heat treatment at 1280 °C resulted in significant changes in various aspects. Firstly, there was a notable reduction in grain size. Secondly, the content of α-TiAl phase
-
Cryo-pre-straining contributes to achieving high yield strength in high-entropy alloys Intermetallics (IF 4.4) Pub Date : 2024-03-15 Cheng Tao, Chao Chen, Jiarui Fan, Wei Luo, Hailong Yi
In this study, we propose an effective and feasible strategy to significantly improve the room-temperature yield strength of the CoCrFeMnNi HEA by 338%, from 281 MPa (as-recrystallized, before CR) to 1231 MPa (30% CR) through cryo-pre-strain-inducing defects such as dislocations, stacking-faults (SFs), nano-twins, Lomer-Cottrell (L-C) locks, and HCP martensite, while maintaining good ductility (16
-
Creep deformation and damage behavior of an alumina-forming austenitic alloy strengthened by intermetallic compounds Intermetallics (IF 4.4) Pub Date : 2024-03-15 Ling Liu, Benjamin Giron-Palomares, Fuxiao Chen, Hongying Sun, Junqing Guo
Based on Fe–30Ni–15Cr, a new alumina-forming austenitic (AFA) alloy, free of carbon, was designed for potential use in ultra-supercritical generator set. The creep behavior of alloy has been investigated by analyzing the creep constitutive equation, creep damage tolerance factor (λ), microstructure images, and oxide layer structure under different stresses at 750 °C. The creep microstructure and oxide
-
Exploring mechanical properties and diffusion paths in Al–Co–Ni diffusion multiples fabricated through spark plasma sintering Intermetallics (IF 4.4) Pub Date : 2024-03-14 Yang Zhou, Yanna Cui, Yihan Hu, Ming Li, Fei Zhou, Jiamiao Liang, Jun Wang
-
Identifying low-cost, machinable, impact-resistant TiAl alloys suitable for last-stage turbine blades of jet engines Intermetallics (IF 4.4) Pub Date : 2024-03-13 Toshimitsu Tetsui
-
Effect of Re addition on microstructure, properties, and performance of AlMo0.5NbTa0.5TiZr refractory high entropy alloy Intermetallics (IF 4.4) Pub Date : 2024-03-11 Milad Zohrevand, Mohammadreza Mokhtare, Amir Momeni, Saeed Sadeghpour, Mahesh Somani
The AlMoNbTaTiZr refractory high-entropy alloy (RHEA) is one of the prominent systems that has recently attracted significant attention mainly due to its significant high-temperature strength. In this study, the effect of Rhenium (Re) addition on microstructure, chemical composition, mechanical properties, corrosion behavior, and high-temperature oxidation characteristics of this alloy has been investigated
-
Growth kinetics of intermetallic compounds in Cu–Ti diffusion couples Intermetallics (IF 4.4) Pub Date : 2024-03-10 Chao Liu, Zhiyi Song, Yonggang Fan, Vladimir Efimovich Rogalin, Cong Wang
-
Polarity effect of interfacial intermetallic compounds of BGA structure Cu/Sn–52In/Cu solder joints during electromigration Intermetallics (IF 4.4) Pub Date : 2024-03-07 Jiaqiang Huang, Yunhui Zhu, Kunhong Pan, Xudong Wang, Zhaoling Huang, Dawei Xiao, Hongjie Jiang
Sn–52In eutectic solder has gradually attracted much attention due to the feature of low melting temperature in recent years. However, Sn–52In solder may occur melting due to the severe Joule heating and causes serious reliability problems. This study mainly investigated the interfacial reaction of ball grid array (BGA) structure Cu/Sn–52In/Cu solder joints during electromigration with current densities
-
Microstructure and martensitic transformation in Ni25Ti25Hf25Cu25 medium entropy shape memory alloy Intermetallics (IF 4.4) Pub Date : 2024-03-06 Q.Z. Li, H.Y. Wang, A.V. Shuitcev, B.H. Wang, L. Li, Y.X. Tong
-
Unleashing the microstructural evolutions during hot deformation of as-cast AlCoCrFeNi2.1 eutectic high entropy alloy Intermetallics (IF 4.4) Pub Date : 2024-03-06 J. Charkhchian, A. Zarei-Hanzaki, T.M. Schwarz, R. Lawitzki, G. Schmitz, N. Schell, Jiajia Shen, J.P. Oliveira, Daudi Waryoba, H.R. Abedi
Many applications with potential use of high entropy alloys (HEAs) involve thermo-mechanical processing. The principal aim of this study is to elucidate the deformation mechanisms of the as-cast AlCoCrFeNi eutectic high entropy alloy (EHEA) at elevated temperatures. This investigation involves considering the interplay between phase transformations affecting microstructural evolutions and restoration
-
The growth behavior and kinetics of intermetallic compounds in Cu–Al interface at 600°C–800 °C Intermetallics (IF 4.4) Pub Date : 2024-03-05 Dandan Zhao, Weijia Guo, Zhichao Shang, Chengyi Xu, Xinran Gao, Xiaohong Wang
Due to the low production cost and light weight, copper-clad aluminum conductors show great potential value in the field of power transmission, while the phase structure and organizational changes at the Cu–Al interface in high-temperature environments have a great impact on the electrical and mechanical properties. In this paper, Cu–Al diffusion couples are prepared to study the diffusion process
-
Effect of ball milling on the structure and electrochemical hydrogen storage properties of a RE-Mg-Ni alloy Intermetallics (IF 4.4) Pub Date : 2024-03-05 Guang Zeng, Tingting Zhai, Zeming Yuan, Pei Gao, Dianchen Feng
RE-Mg-Ni alloy is considered a highly promising anode material for the next generation of MH-Ni batteries. However, the low cycle life, fast performance, and high manufacturing cost of this ideal MH-Ni battery anode material have become obstacles to its optimization. In this work, an as-cast LaSmMgNiCo superlattice alloy was prepared by vacuum medium frequency induction melting. Then, LaSmMgNiCo +
-
Phase equilibria and thermodynamics assessment of the Co–Fe–Nb ternary system Intermetallics (IF 4.4) Pub Date : 2024-03-04 Yohanes Hutabalian, Gita Novian Hermana, Andromeda Dwi Laksono, Sinn-wen Chen
The Co–Fe–Nb materials system is a crucial material for magnetic applications. Despite its importance, the phase equilibria and thermodynamic characteristics of this ternary system have not been explored in detail. This study employs the Calphad method to model the phase equilibria of the Co–Fe–Nb ternary system. To obtain the ternary interaction parameters, the experimental data on the isothermal
-
Magnetic structure analysis of the L21-type austenite in Ni–Mn–In alloys Intermetallics (IF 4.4) Pub Date : 2024-03-04 J. López-García, D.L.R. Khanna, J.L. Sanchez Llamazares, P. Álvarez-Alonso, P. La Roca, V. Recarte, V. Sánchez-Alarcos, J.I. Pérez-Landazábal, J.A. Rodríguez-Velamazán
In general, the magnetocaloric (MC) materials undergoing a magneto-structural transition (first order) have a higher MC effect than purely magnetic transition (second-order). However, the first order transformation displays thermal and magnetic hysteresis and reversibility problems. In this work we present an alternative way to improve the MC effect in Ni–Mn–In alloys, controlling magnetism in second-order
-
Influence of C14 Laves phase and Zr-rich phase interactions on the hydrogen storage properties of Ti32.5V27.5Zr7.5Nb32.5 high entropy hydrogen storage alloy Intermetallics (IF 4.4) Pub Date : 2024-03-03 Guanglong Li, Yue Li, Jian Liang, Zhen Wen, Tong Zhang, Xin Ding, Yingdong Qu
TiVZrNb high entropy alloys possesses excellent hydrogen storage properties as hydrogen storage materials. This is due to the fact that all four elements are composed of hydrogen-absorbing elements with large differences in atomic size. In this study, the effects of C14 Laves phase content and Zr element distribution on the hydrogen storage properties of TiVZrNb alloy with different heat treatment
-
Low cycle fatigue performances of Al0.3CoCrFeNi high entropy alloys: In situ neutron diffraction studies on the precipitation effects Intermetallics (IF 4.4) Pub Date : 2024-03-02 Zongyang Lyu, Chuhao Liu, Di Xie, Rui Feng, Dunji Yu, Yan Chen, Ke An, Yanfei Gao, Huamiao Wang, Peter K. Liaw
-
Effects of molybdenum content and heat treatment on hydrogen evolution reaction properties and microstructure of FeCoCrNiMox high entropy alloys Intermetallics (IF 4.4) Pub Date : 2024-03-02 Qiankun Zhang, Mengmeng Du, Yifeng Xiao, Liang Wu, Jinwen Qian, Can Zhang, Yuehui He
The preparation of efficient and long-lasting electrocatalysts with low cost is crucial for hydrogen production by water electrolysis. Here, a series of high-entropy alloys (HEAs) of FeCoCrNiMo (x = 0, 0.5, 1, 1.5, and 2) were created by arc melting method and enhanced by heat treatment according to various schedules. The microstructure transitioned from the FCC phase to the FCC + σ phase and finally
-
Intermetallic eutectics with gigapascal strength and enhanced ductility Intermetallics (IF 4.4) Pub Date : 2024-03-01 Vilas Gunjal, Chandra Sekhar Tiwary, Kamanio Chattopadhyay, Dipankar Banerjee
The Ni–Al–Zr system offers a variety of intermetallic eutectic combinations. Here, we demonstrate complex eutectic microstructures consisting of intermetallic i.e. NiAl–NiZr, NiAl–NiZr, and NiAl–NiAl–NiZr. We also developed alloys with different fractions of two eutectics i.e. NiAl–NiZr, NiAl–NiZr. These microstructures result in attractive combinations of ultra-high tensile strength of more than 1
-
Hot deformation behavior analysis of as-cast CoCrFeNi high entropy alloy using Arrhenius-type and artificial neural network models Intermetallics (IF 4.4) Pub Date : 2024-02-29 M. Karimzadeh, M. Malekan, H. Mirzadeh, N. Saini, L. Li
An as-cast equiatomic CoCrFeNi high entropy alloy was investigated through hot compression tests conducted at various temperatures ranging from 700 to 1000 °C and different strain rates ranging from 0.001 to 0.1 s. The flow stress curves were analyzed and modelled using both Arrhenius-type hyperbolic-sine relationship and artificial neural network (ANN) modeling. While the Arrhenius-type modeling yielded
-
A novel mechanochemical synthesis of ferromagnetic Fe3Al nanoparticles and preparation of its polyaniline nanocomposite Intermetallics (IF 4.4) Pub Date : 2024-02-29 M. Mohammadi, S.A. Kahani
-
Mechanical properties and deformation mechanisms of C-doped interstitial high-entropy alloy CrMnFeCoNi: Effects of strain rate and C content Intermetallics (IF 4.4) Pub Date : 2024-02-28 Q. Liu, B. Li, C.H. Yi, C.H. Mi, J.Y. Hua, J.C. Yuan, X.J. Zhao, L. Lu, N.B. Zhang
The effects of strain rate on mechanical properties, microstructural evolution and underlying deformation mechanisms of two kinds of interstitial CrMnFeCoNi high entropy alloys (HEAs), (CrMnFeCoNi)C and (CrMnFeCoNi)C, are investigated under quasi-static and dynamic tension. Dynamic loading is carried out via a split Hopkinson tension bar system. The pre- and post-deformation microstructures are characterized
-
Multistage strain hardening facilitated by in-situ TiO(C) nanoparticles in CoCrFeMnNi high entropy nanocomposite subjected to high strain rate compression Intermetallics (IF 4.4) Pub Date : 2024-02-26 Zhen Zhang, Yuehuang Xie, Jiamiao Liang, Yang Zhou, Sammy Lap Ip Chan, Jun Wang
Second phase nanoparticles have been notable reinforcements to enhance strength of high entropy alloys based on Orowan mechanism, but their contributions to improving strain hardening ability through facilitating deformation behaviors are still unclear. In this study, an in-situ TiO(C) nanoparticles reinforced CoCrFeMnNi high entropy nanocomposite was fabricated through powder metallurgy routes. The
-
Effect of Mn addition on microstructure and corrosion behavior of AlCoCrFeNi high-entropy alloy Intermetallics (IF 4.4) Pub Date : 2024-02-23 Dandan Zhang, Qiang Li, Rongze Sun, Chuntao Chang, Bin Liu, Xu Ma
In this study, the effects of Mn content on the microstructure and corrosion resistance of AlCoCrFeNiMn (x = 0, 0.25, 0.5, 0.75, and 1) high-entropy alloys were investigated. The results indicate that with increasing Mn content, the HEAs consistently comprise nanophase BCC geometry with different shapes embedded in the ordered B2-phase matrix, and the morphology of the microstructure changes from a
-
Study on properties of MnAlC magnetic powder and bulk Intermetallics (IF 4.4) Pub Date : 2024-02-21 Xiangpeng Chang, Chao Shi, Lunjia Du, Lin Luo, Donglin Guo, Yilong Ma, Chunhong Li
The magnetic properties of MnAl are improved by doping C to stabilize the magnetic phase. In this work, a method to prepare high performance MnAlC magnetic powder and bulk is presented. This enhances the potential of MnAl to replace rare earth permanent magnet material. The phase composition, microstructure and magnetic properties of the samples were measured and studied. After annealing and tempering
-
Manufacture and characterization of RE2Co (RE=Gd, Ho) amorphous alloys with excellent magnetic entropy change Intermetallics (IF 4.4) Pub Date : 2024-02-21 J.B. Jia, Y.S. Du, G. Fu, X.F. Wu, J.Q. Deng, G. Cheng, J. Wang, J.T. Zhao, G.H. Rao
The structure, low-temperature magnetic transition behaviors, and magnetocaloric properties of rare-earth-based binary RECo (RE = Gd, Ho) amorphous alloys were studied. With the increase of temperature, the amorphous alloys undergo a phase transition from the ferromagnetic state to the paramagnetic state. In the paramagnetic region, the reciprocal magnetic susceptibilities of GdCo obey the Curie-Weiss
-
Microstructure evolution and characteristics of laser cladding with pre-placed powder lightweight refractory NbxMo0.5Ti1.5Ta0.2Cr high-entropy alloy Intermetallics (IF 4.4) Pub Date : 2024-02-20 C.Y. Cui, H.H. Xu, F.Y. Ye, J. Yang, X.G. Cui
Lightweight refractory high-entropy alloy coatings (RHEAcs) of NbMoTiTaCr (where x = 1, 1.3, 1.5, and 2) were fabricated on the surface of 316L stainless steel using pre-placed powder laser cladding (LC) technology. A comprehensive study was conducted to elucidate the effect of Nb content on the microstructure, microhardness and wear resistance of NbMoTiTaCr RHEAcs before and after annealing at 900 °C
-
Thermoelectric properties of iso-valent Bi substituted n-type Ti2NiCoSnSb high entropy alloys Intermetallics (IF 4.4) Pub Date : 2024-02-20 B.S. Subathra, Madhuvathani Saminathan, Prince Wesley, Lokeshwaran Ravi, Manjusha Battabyal, Debattam Sarkar, Suresh Perumal, Ravikirana
High entropy alloys have captivated so much attention in the field of thermoelectric due to their superior electrical, thermal, and mechanical properties. In this work, we report improved thermoelectric properties of TiNiCoSnSbBi high entropy alloy, synthesized by vacuum arc melting followed by ball milling and induction hot-press. Powder X-ray diffraction pattern confirmed the C1 structure and solubility
-
Regulation of phase partition and wear resistance for FeCoCrV high entropy alloy by heat treatment Intermetallics (IF 4.4) Pub Date : 2024-02-17 Jiahui Shen, Jing Hu, Xulong An
In this research, FeCoCrV high entropy alloy was prepared by casting and cold rolling, and heat treatment was used to control the phase partition of FeCoCrV alloy. Meanwhile, the wear resistance of FeCoCrV alloy under different phase partition was investigated. Metallographic microscope, X-ray diffractometer, Vickers microhardness tester and friction and wear testing machine were used to analyze the
-
Effect of low-energy mechanical activation (LEMA) on the morphology of 3Ni/Al powder and the synthesis of Ni3Al intermetallic compound Intermetallics (IF 4.4) Pub Date : 2024-02-14 Oleg V. Lapshin, Evgeny N. Boyangin
The effect of low-energy mechanical activation (LEMA) of 3Ni/Al powder on the explosive synthesis of NiAl intermetallic compound was studied experimentally. LEMA time was varied between 0 and 50 h. Mechanical forces were found to be essential in the deformation-induced reorganization of the powder's morphological structure. An anomalous decrease of the critical ignition temperature in the mixture up
-
Ni2NbSn Heusler ferromagnetic superconductor: Magneto-structural and transport characterisation Intermetallics (IF 4.4) Pub Date : 2024-02-14 Samuel Nalevanko, Jozef Kačmarčík, Ladislav Galdun, Andrea Džubinská, Michal Varga, Gabriel Sučík, Pavel Diko, Marián Reiffers, Rastislav Varga
This work presents the preparation and characterisation of the multifunctional Heusler alloy. The alloy was prepared using arc melting in the form of an ingot showing an Heusler structure. The resistance measurements confirmed the superconductive character of the alloy with the critical temperature of = 3.00 K and the upper critical magnetic field of μ = 0.69 T. Magnetic measurements confirmed strong
-
Comparison of microstructure, mechanical properties and biocompatibility of CoCrFeNiMn high-entropy alloy with 316L stainless steel Intermetallics (IF 4.4) Pub Date : 2024-02-14 Hamed Shahmir, Nebras Kamel Falih Al-Asadi, Zuhair Jabbar Abdul Amir Bani-Asad
The present investigation was conducted to compare CoCrFeNiMn high-entropy alloy as a new class of material with conventional 316L stainless steel. The alloys were processed by cold rolling followed by short-term annealing to achieve a single-phase microstructure with fine grains and represent high strength and ductility with an ultimate tensile stress more than 600 MPa and an elongation to failure
-
L12-phase nano-structures and their stabilities in dilute Al–Zr–Y alloys: A first-principles study Intermetallics (IF 4.4) Pub Date : 2024-02-13 Shijia Wang, Jiangang Yao, David Dawei Jiang, Xuan Xie, Yiren Wang, Yong Jiang
We present an interface-level first principles study on the formation of L1-phase nano-structures in dilute Al-Zr-Y alloys. All energetics, relevant to bulk substitution, interface formation, interfacial coherent strain and segregation, were calculated and used to evaluate the nucleation and relative stabilities of various possible L1 nano-structures. The following new insights were obtained. Only
-
The rheological behavior and constitutive model of Zr35Ti30Be27·5Cu7.5 metallic glass under high strain rate tensile conditions within the supercooled liquid region Intermetallics (IF 4.4) Pub Date : 2024-02-09 Mingda Si, Pan Gong, Hu Huang, Jianhua Mo, Xinyun Wang
Tensile rheological behavior of the ZrTiBeCu metallic glass under conditions of high strain rates (strain rates ranging from 0.05 s to 0.5 s) within the supercooled liquid region was studied. The stress-strain curve reveals that this metallic glass demonstrates non-Newtonian flow characteristics under these circumstances. The peak stress associated with stress overshoot increases as temperature decreases
-