Article
Nanoscience & Nanotechnology
Cheenepalli Nagarjuna, Sheetal Kumar Dewangan, Hansung Lee, Byungmin Ahn
Summary: A novel equiatomic CrFeNiTiV high entropy alloy (HEA) was synthesized through mechanical alloying and spark plasma sintering, and the effects of heat treatment temperature on the phase stability and mechanical properties were investigated. The results showed that the phase and mechanical properties of the HEA were improved after heat treatment, making it suitable for high-temperature applications.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2023)
Article
Nanoscience & Nanotechnology
Yitan Zhang, Maowen Liu, Jingyong Sun, Guodong Li, Ruixiao Zheng, Wenlong Xiao, Chaoli Ma
Summary: This study transformed the FeCoNiCu high-entropy alloy into bulk nanostructured material with a multi-phase nanostructure through high pressure torsion and subsequent annealing, achieving outstanding thermal stability, high yield strengths, and total elongation.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2022)
Article
Materials Science, Ceramics
Yongqiang Tan, Wei Liao, Zhen Teng, Xiaosong Zhou
Summary: A novel technique to lower the synthesis temperature and maintain the mechanical properties of high-entropy carbides was proposed. The introduction of carbon vacancies and reaction with boron carbide led to the formation of high-entropy boride phase, which significantly improved the mechanical properties.
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2023)
Article
Materials Science, Multidisciplinary
Yichen Wang, Tamas Csanadi, Hangfeng Zhang, Jan Dusza, Michael J. Reece
Summary: A series of novel high entropy ceramics were synthesized using spark plasma sintering, and the effect of the nitrogen-to-carbon ratio on their microstructure, phase compositions, bonding characteristics, and mechanical properties was investigated. The results showed that the lattice parameter and theoretical density of the ceramics increased with increasing nitrogen ratio, while the grain size remained unchanged. The hardness and modulus of the ceramics decreased with increasing nitrogen ratio, but were still higher than the rule of mixture values.
Article
Chemistry, Physical
Shuyu Liu, Wei Zhang, Yingbo Peng, Rui Zhou, Haijiang Wang, Qingyuan Ma
Summary: The (Fe40Co50Ni10)-(VNbTaZrCx) alloys, strengthened by in-situ high entropy multi-component carbides (MCCs), showed remarkable strengthening and toughening effects. The combination of high entropy MCCs with dispersion strengthening and grain refinement strengthening contributed to the increase in both strength and ductility. The microstructure of the alloys was significantly refined with the increase of carbon content, leading to improved mechanical properties.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Materials Science, Ceramics
Yichen Wang, Tamas Csanadi, Zsolt Fogarassy, Buhao Zhang, Richard Sedlak, Xincheng Wang, Chengyu Zhang, Jan Dusza, Michael J. Reece
Summary: Group VI transition metals can be incorporated into a rock salt high entropy carbide lattice, forming stable high entropy carbides. The solubility of Cr is increased by the high entropy effect, affecting the hardness and grain size of the material.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2022)
Article
Chemistry, Physical
Jiaojiao Yi, Lin Yang, Mingqin Xu, Lu Wang, Lisha Liu, Long Zeng
Summary: In this study, the phase components, microstructures, and compressive properties of a novel 3D transition metal high entropy alloy CuFeNiTiV in the as-cast condition were investigated. The thermodynamic simulations revealed the order of phase separation during solidification, which was confirmed by XRD analysis of the alloy's phase components. The outstanding fracture strength of 2086 MPa in the as-cast alloy was attributed to the deformation resistance of both the major BCC phase and laves phase.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Materials Science, Ceramics
Shi-Yu Liu, Shuoxin Zhang, Shiyang Liu, De-Jun Li, Yaping Li, Sanwu Wang
Summary: Through calculations, nine new high-entropy metal carbides were predicted and an explanation was provided for the existence of six experimentally realized quaternary high-entropy metal carbides. The results show that these materials possess unique properties of high hardness, high fracture toughness, and ultrahigh melting points.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2021)
Article
Materials Science, Multidisciplinary
X. J. Gao, L. Wang, N. N. Guo, L. S. Luo, G. M. Zhu, C. C. Shi, Y. Q. Su, J. J. Guo
Summary: This paper investigates the effects of Cr addition on the microstructure, phase constitutes, and mechanical properties of the Hf0.5Mo0.5NbTiZr refractory high-entropy alloy. The addition of Cr refines the dendritic structure, increases the strength, and influences the plasticity of the alloy. Homogenization treatment promotes the formation of Laves phase and significantly enhances the strength of the alloy.
INTERNATIONAL JOURNAL OF REFRACTORY METALS & HARD MATERIALS
(2021)
Article
Chemistry, Physical
Liyang Fang, Jun Wang, Xiaoning Li, Xiaoma Tao, Yifang Ouyang, Yong Du
Summary: Introducing Laves phase into refractory high entropy alloys is a new exploration direction for improving alloy strength. The study found that the addition of Cr elements affects the alloy properties mainly through the formation of the high entropy Laves phase. With increasing Cr content, the fraction of Laves phase significantly increases, and the heat treatment results in an increase in the fraction of C15 Laves phase and BCC phases. The hardness and strength of the alloys significantly increase with the addition of Laves phase, while ductility is compromised.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Materials Science, Multidisciplinary
Chendong Zhao, Jinshan Li, Yudong Liu, William Yi Wang, Hongchao Kou, Eric Beaugnon, Jun Wang
Summary: This paper investigates the effect of phase transformation on the mechanical and magnetic properties in multi-phase systems, using the AlCoCrFeNi high-entropy alloy as a candidate. Changes in volume fractions of different phases have divergent effects on mechanical and magnetic properties, with the formation of FCC phase positively affecting mechanical properties and the volume fraction of BCC phase playing a major role in determining magnetic properties.
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
(2021)
Article
Materials Science, Ceramics
Shi-Yu Liu, Shuoxin Zhang, Shiyang Liu, De-Jun Li, Zhiqiang Niu, Yaping Li, Sanwu Wang
Summary: Thermodynamics and first-principles calculations were used to investigate the structural stability and mechanical properties of fifty-six quinary high-entropy metal carbides, predicting the synthesis of thirty-eight new compounds. All the metal carbides were found to possess unique mechanical properties of high hardness and high fracture toughness, with the brittleness decreasing as the valence electron concentration increases.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2022)
Article
Chemistry, Physical
Changshuai Wang, Fengzhi Zhang, Yunsheng Wu, Lanzhang Zhou
Summary: The phase precipitation behavior of a solid-solution strengthened Ni-based alloy at high temperatures and its influence on mechanical properties were studied. It was found that the precipitation of MC carbide and gamma '' phase during thermal exposure played a significant role in the alloy's performance. The decrease in elongation and impact toughness was mainly attributed to the increase in grain interior strength and the presence of film-like M23C6 carbide.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Nanoscience & Nanotechnology
M. Wang, Z. L. Ma, Z. Q. Xu, X. W. Cheng
Summary: The novel VxNbMoTa high-entropy alloys with vanadium concentrations of 0-25 at.% exhibit exceptional phase stability and high temperature strength, as well as excellent room-temperature ductility and resistance to high temperature deformation.
SCRIPTA MATERIALIA
(2021)
Review
Materials Science, Multidisciplinary
Hang Wang, Quan-Feng He, Yong Yang
Summary: This article provides a focused review on the recent researches on high-entropy intermetallics (HEIs), covering the fundamentals, formation rules, and structural and functional properties. The results show that HEIs with distinct properties could be a promising material for future structural and functional applications.
Article
Materials Science, Multidisciplinary
Zhufeng He, Yanxin Guo, Lifang Sun, Xianjun Guan, Shuang Jiang, Yongfeng Shen, Wen Yin, Xiaoli Zhao, Zhiming Li, Nan Jia
Summary: This study presents a universal strategy for designing ultrastrong and ductile face-centered cubic (fcc) multicomponent alloys by introducing interstitial-driven local chemical order (LCO) through simple thermomechanical processing. Fine laths containing interstitial-driven LCO domains have been observed in a prototype FeMnCoCrN alloy, resulting in an ultra-high yield strength of 1.34 GPa and a uniform elongation of 13.9%. This design strategy has also been successfully applied to a multicomponent austenitic steel, suggesting its potential in developing high-performance fcc materials at low cost.
Article
Materials Science, Multidisciplinary
Penghua Ge, Kefu Gan, Dingshun Yan, Pengfei Wu, Weisong Wu, Zhiming Li
Summary: This study reports an anomalous low-temperature annealing-induced hardening behavior in a prototype equiatomic FeCoNi medium-entropy alloy subjected to severe cold-rolling deformation. The hardening phenomenon is confirmed by microhardness measurements and tensile tests, and is correlated with the annealing-modified nanosubgrained structure. The reduction of distribution heterogeneities of shear bands and nanosubgrains upon annealing contributes to the relief of strain localization during plastic yielding. The rearrangement of nanosubgrains upon annealing also relieves the severe heterogeneity of nanohardness distribution, resulting in higher macroscopic strength and hardness. This novel annealing-induced hardening phenomenon provides a guideline for optimizing the thermomechanical treatment strategies of FeCoNi medium-entropy alloys to enhance their mechanical properties.
ADVANCED ENGINEERING MATERIALS
(2023)
Article
Materials Science, Multidisciplinary
Zhengxiong Su, Jun Ding, Miao Song, Li Jiang, Tan Shi, Zhiming Li, Sheng Wang, Fei Gao, Di Yun, En Ma, Chenyang Lu
Summary: In this study, carbon and nitrogen were introduced into the NiCoFeCrMn high-entropy alloy to create chemical heterogeneities, resulting in reduced void swelling. The findings suggest that alloying with interstitial elements can improve radiation tolerance in high-entropy alloys.
Article
Chemistry, Physical
Minming Jiang, Jiang Xu, Paul Munroe, Zong-Han Xie
Summary: In this study, the hydrogen storage mechanism on the CuNi co-doped MgH2(101) surface was investigated using the first-principles approach. The results showed that the most stable adsorption site for hydrogen on the surface is above the Ni atom, and there is substantial charge exchange between the hydrogen molecule and Ni atom.
Article
Engineering, Environmental
Yang Wang, Stephen Joseph, Xiang Wang, Zhe H. Weng, David R. G. Mitchell, Mitchell Nancarrow, Sarasadat Taherymoosavi, Paul Munroe, Guitong Li, Qimei Lin, Qing Chen, Markus Flury, Annette Cowie, Olivier Husson, Lukas Van Zwieten, Yakov Kuzyakov, Johannes Lehmann, Baoguo Li, Jianying Shang
Summary: Biochar amendments increased total soil carbon by 71%, 182%, and 210% for B30, B60, and B90, respectively. The application of biochar at different rates significantly increased the subsoil inorganic carbon (SIC), mainly occurring in the subsoil below 1 m. The study provided critical knowledge on the impact of biochar application on carbon stocks in subsoil in the long term.
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2023)
Article
Chemistry, Physical
Ashok Meghwal, Samuel Pinches, Ameey Anupam, Lionel Lie, Paul Munroe, Christopher C. Berndt, Andrew Siao Ming Ang
Summary: In this study, a near-dense and crack-free CoCrFeNi medium entropy alloy (MEA) coating was fabricated using extreme-high-speed laser material deposition (EHLA). The coating retained a single-phase face-centered cubic (FCC) structure, and showed anisotropic mechanical deformation behavior at a localized level. Microstructure-mechanical property correlations confirmed the homogeneous mechanical properties of the coating at the bulk level.
Article
Chemistry, Physical
Yong Zhang, Pengfei Wu, Yu Lu, Xun Cao, Yizhong Huang, Vincent Gill, Zhiming Li
Summary: The atomic-scale structures of Z-plates in a Zr-alloyed Sm2Co17-type magnet were investigated using aberration-corrected STEM. Zr preferentially replaces dumbbell Sm to form (Sm1/3Zr2/3)Co3 Z-plates, which contribute to the enhancement of magnet performance. Different stacking types of Z-plates were observed, some of which exceed the thickness of double 2/3-stacking and degrade the oxidation resistance of the magnet. The diffusion-controlled mechanisms for the phase transformation from the 2:17R matrix to the 1:3R Z-plates were unraveled.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Nanoscience & Nanotechnology
Yong Zhang, Pengfei Wu, Wenquan Ming, Xun Cao, Yizhong Huang, Zhiming Li
Summary: It is reported that the presence of Sm2O3 microparticles in Sm2Co17-type magnets may deteriorate their magnetic properties but improve mechanical and electrical performance. In this study, the distribution, structure, and elastic properties of Sm2O3 in a high-end Sm2Co17-type magnet were investigated. The results showed that the Sm2O3 microparticles with a size of 4.8 ± 2.1 μm were randomly dispersed in the magnet and acted as preferential sites for segregation of Zr-rich inclusions. The indexed structure of Sm2O3 was found to be metastable trigonal A-type, and its nano-twinned structure exhibited ductility, which could effectively reduce the brittleness of the magnet. This work provides insights into balancing the magnetic and mechanical properties of Sm2Co17-type magnets.
SCRIPTA MATERIALIA
(2023)
Article
Nanoscience & Nanotechnology
Ashok Meghwal, Surinder Singh, Soumya Sridar, Wei Xiong, Colin Hall, Paul Munroe, Christopher C. Berndt, Andrew Siao Ming Ang
Summary: A novel high entropy alloy-medium entropy alloy composite coating was designed using a CALPHAD approach, which showed potential for industrial applications. The experimental results demonstrated that the composite coating had higher hardness and superior wear resistance, making it promising for structural applications.
SCRIPTA MATERIALIA
(2023)
Article
Materials Science, Multidisciplinary
Wenjun Lu, Wenqi Guo, Zhangwei Wang, Jianjun Li, Fengchao An, Gerhard Dehm, Dierk Raabe, Christian H. Liebscher, Zhiming Li
Summary: In this study, a novel strategy is developed to mitigate the embrittlement of sigma phase particles in high-entropy alloys (HEAs) by utilizing displacive transformation and heterogeneous structures. The deformation behavior study reveals that the displacive transformation from face-centered cubic (FCC) to hexagonal close packed (HCP) phase effectively suppresses the propagation of microcracks in brittle sigma particles and contributes to high work hardening behavior. The transformation induced stress-relaxation around the regions containing brittle sigma particles in heterogeneously structured HEAs results in ultimate tensile strengths as high as -1.2 GPa while maintaining a ductility up to -50%.
Article
Materials Science, Multidisciplinary
Wei Jiang, Heng Wang, Zhiming Li, Yonghao Zhao
Summary: A carbon-nitrogen co-doped interstitial high entropy alloy (iHEA) with excellent mechanical properties was prepared. By optimizing the microstructures through cold-rolling and annealing treatments, the iHEA exhibited ultrafine grains and nanoprecipitates, resulting in high hardness and tensile strength. While sacrificing some ductility, the iHEA maintained good mechanical properties even after annealing.
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
(2023)
Article
Materials Science, Multidisciplinary
Zhenghong Fu, Yong Zhang, Zhiming Li, Yiping Lu, Xiaoxiang Wu, Hui Wang
Summary: This study reports the development of a selectively laser melted eutectic high-entropy alloy with ultrahigh strength and good ductility through tuning micro-to nano-scale heterogeneous microstructures. The nano-sized B2 and L12 phases effectively hinder dislocation motion and improve strength, while the face-centered cubic matrix ensures uniform deformation and the Cr-rich clusters alleviate possible brittle failure of the hard B2 phase.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2023)
Article
Materials Science, Multidisciplinary
Kefu Gan, Dingshun Yan, Yong Zhang, Zhiming Li
Summary: Low SFE nanocrystalline alloys with PNTs and HGS exhibit exceptional strength-ductility combinations. HGS promotes strain partitioning and strain localization, while PNTs alleviate strain localization and facilitate homogeneous deformation. PNTs block intragranular mobile Shockley partials and enhance dislocation reaction probability, increasing the densities of sessile SSDs.
JOURNAL OF THE MECHANICS AND PHYSICS OF SOLIDS
(2023)
Article
Multidisciplinary Sciences
Jiaojiao Hu, Qiankun Yang, Shuya Zhu, Yong Zhang, Dingshun Yan, Kefu Gan, Zhiming Li
Summary: This study demonstrates a metastability engineering strategy for toughening superhard high-entropy carbides (HECs) by introducing in-situ metastable ceramic particles. The transformation of metastable tetragonal ZrO2 particles under mechanical loading promotes crack tip shielding mechanisms, leading to enhanced fracture toughness of the HECs.
NATURE COMMUNICATIONS
(2023)
Article
Materials Science, Multidisciplinary
Pengfei Wu, Yong Zhang, Liuliu Han, Kefu Gan, Dingshun Yan, Weisong Wu, Lunhua He, Zhenghong Fu, Zhiming Li
Summary: In this study, a newly developed non-equiatomic high-entropy alloy with an ultra-low stacking fault energy was investigated. It was found that the formation of martensite transformation was suppressed due to the presence of chemical short-range order and atomic size misfit, leading to enhanced plastic deformation ability and ductility in the alloy.
Article
Nanoscience & Nanotechnology
Ahmad Mirzaei, Peter D. Hodgson, Xiang Ma, Vanessa K. Peterson, Ehsan Farabi, Gregory S. Rohrer, Hossein Beladi
Summary: This study investigated the influence of parent austenite grain refinement on the intervariant boundary network in a lath martensitic steel. It found that refining the parent austenite grain led to a decrease in the fraction of certain boundaries in the martensite and an increase in the connectivity of low energy boundaries, ultimately improving the impact toughness.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2024)
Article
Nanoscience & Nanotechnology
N. L. Church, C. E. P. Talbot, L. D. Connor, S. Michalik, N. G. Jones
Summary: Metastable beta Ti alloys based on the Ti-Nb system have attracted attention due to their unique properties. However, the unstable cyclic behavior of these alloys has hindered their widespread industrial use. Recent studies have shown that internal stresses, including those from dislocations, may be responsible for this behavior. This study demonstrates that inter-cycle thermal treatments can mitigate the unstable cyclic behavior, providing a significant breakthrough in our understanding of Ti-Nb superelastic materials.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2024)
Article
Nanoscience & Nanotechnology
Di Zhao, Chenchen Zhao, Ziyang Xiu, Jiuchun Yan
Summary: This study proposes a novel strategy for achieving the bonding of SiC ceramic and Al alloy using ultrasound. The ultrasound promotes the dissolution of Al into the solder, activating the solder and triggering the interfacial reaction between SiC ceramic and solder. With increasing ultrasonic duration, the bonding between SiC and Al transitions from partial to full metallurgical bonding.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2024)
Article
Nanoscience & Nanotechnology
Kang Du, Yang Zhang, Guangda Zhao, Tao Huang, Liyuan Liu, Junpeng Li, Xiyu Wang, Zhongwu Zhang
Summary: This paper systematically investigated the evolution of microstructure in Fe-Ni-Co-Al polycrystalline alloys and its effects on mechanical properties. The results revealed that the migration of grain boundaries in different processes is driven by different factors, which impacts the grain orientation and precipitate formation. In the process of directional recrystallization, grains with specific orientations grow in the grain boundary region and form the dominant orientation, while grains with lower migration rate form the minor orientation. The alloy produced through directional recrystallization exhibited good recoverable strain and superelastic strain, while the alloy produced through solid solution treatment showed no evident superelastic behavior.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2024)
Article
Nanoscience & Nanotechnology
Edohamen Awannegbe, Liang Chen, Yue Zhao, Zhijun Qiu, Huijun Li
Summary: This study employed laser metal deposition to additively manufacture Ti-15Mo wt% alloy, and subsequently subjected it to post-fabrication uniaxial thermomechanical processing. The results showed that different zones in the microstructure remained after processing, and deformation mechanisms mainly involved slip and martensite formation. The compressive mechanical properties were found to be dependent on strain rate, with higher flow stress and compressive strength observed at higher strain rates. Grain structure homogenisation was not achieved, leading to anisotropic tensile properties.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2024)
Article
Nanoscience & Nanotechnology
Reza Khatib Zadeh Davani, Enyinnaya George Ohaeri, Sandeep Yadav, Jerzy A. Szpunar, Jing Su, Michael Gaudet, Muhammad Rashid, Muhammad Arafin
Summary: This research aims to investigate the effect of roughing and finishing reductions on crystallographic texture. The results show significant heterogeneity in the centerline region, with higher intensity of certain textures. Drop Weight Tear Test indicates that steel specimens with lower and medium reductions exhibit superior low-temperature impact toughness compared to steel with higher reductions. The electrochemical hydrogen charging experiments confirm the presence of internal hydrogen cracks only in steel with lower and medium reductions.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2024)
Article
Nanoscience & Nanotechnology
Flavio De Barbieri, Denis Jorge-Badiola, Rodrigo Allende, Karem Tello, Alfredo Artigas, Franco Perazzo, Henry Jami, Juan Perez Ipina
Summary: This study examines the effect of Cr additions on the mechanical behavior of TWIP steel at temperatures ranging from 25°C to 350°C. The results indicate that different temperature-dependent strengthening mechanisms, including mechanical twinning, Dynamic Strain Aging, and slip bands, are at play. The stacking fault energy (SFE) influences the percentage of mechanical twinning, which in turn affects the strain hardening rate.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2024)
Article
Nanoscience & Nanotechnology
Hanlin Peng, Siming Huang, Ling Hu, Bingbing Luo, Liejun Li, Ian Baker
Summary: This study explores the weldability, microstructures, and mechanical properties of two L1(2)-nanoparticle-strengthened medium-entropy alloys after electron beam welding (EBW). The results show that strong yet ductile defect-free joints were produced, with larger grain sizes in the fusion zones compared to the heat-affected zones and base materials. Both EBWed MEAs exhibited high yield strengths, high ultimate tensile strengths, and good fracture strains at 77 K. The V-doping improved the cryogenic mechanical properties of the TMT MEA.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2024)
Article
Nanoscience & Nanotechnology
Yongxin Wang, Lei Chen, Lizi Shao, Shuo Hao, Motomichi Koyama, Xingzhou Cai, Xiaocong Ma, Miao Jin
Summary: This study investigated the tensile deformation behavior of an Mn-N bearing lean duplex stainless steel with metastable austenite. The results showed that the strain rate had significant influence on the work hardening, strain-induced martensitic transformation, and fracture mechanism.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2024)
Article
Nanoscience & Nanotechnology
Jong Woo Won, Seulbi Lee, Hye-Jeong Choe, Yong-Taek Hyun, Dong Won Lee, Jeong Hun Lee
Summary: Cold-rolled pure titanium showed improved sheet formability after undergoing cryogenic-deformation treatment. This treatment increased the thinning capability of the titanium and suppressed cracking during sheet forming. The formation of twins during deformation contributed to high thinning capability and increased strength through grain refinement and dislocation accumulation.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2024)
Article
Nanoscience & Nanotechnology
Handong Li, Lin Su, Lijuan Wang, Yanbin Jiang, Jiahui Long, Gaoyong Lin, Zhu Xiao, Yanlin Jia, Zhou Li
Summary: Homogenization heat treatment is a key procedure in controlling the second phase, enhancing composition uniformity, and workability of as-cast Cu-15Ni-8Sn alloy. This study found that electropulsing treatment (EPT) can significantly reduce treatment temperature and time, improve elongation and overall mechanical properties of the alloy.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2024)
Article
Nanoscience & Nanotechnology
Yuxuan Wang, Juntao Zou, Lixing Sun, Yunfei Bai, Zhe Zhang, Junsheng Cheng, Lin Shi, Dazhuo Song, Yihui Jiang, Zhiwei Zhang
Summary: A novel mechanical-heat-electricity synergistic method was proposed to enhance the mechanical properties of Cu-15Sn-0.3Ti alloy by forming annealing twins (ATs). The combination method of Rotary swaging (RS) and Electric pulse treatment (EPT) successfully induced recrystallization and refinement of the microstructure, leading to a significant increase in the strength of the alloy within a short time.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2024)
Article
Nanoscience & Nanotechnology
Zhiyi Ding, Jiangtao Xie, Tong Wang, Aiying Chen, Bin Gan, Jinchao Song
Summary: This study demonstrated the Ta-induced strengthening of CoCrNi-AlTi MEAs using nanoscale heterogeneous coherent precipitates. The addition of Ta and aging treatments significantly enhanced the mechanical properties of the alloy, including yield strength, ultimate tensile strength, and elongation.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2024)
Article
Nanoscience & Nanotechnology
Z. Y. You, Z. Y. Tang, B. Wang, H. W. Zhang, P. Li, L. Zhao, F. B. Chu, H. Ding
Summary: The mechanical properties and microstructural evolution of C-doped TRIP-assisted HEA under dynamic loading conditions were systematically investigated in this study. The results showed that dynamic tensile deformation led to an increase in yield strength and a decrease in ultimate tensile strength, with a trend towards increased total elongation. The primary deformation mechanisms shifted from TRIP and TWIP effects to deformation twinning and dislocations. The presence of carbides formed through C-doping hindered dislocation slip and promoted the activation of multiple twinning systems.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2024)
Article
Nanoscience & Nanotechnology
Feng Qin, Feihu Chen, Junhua Hou, Wenjun Lu, Shaohua Chen, Jianjun Li
Summary: Plastic instability in strong multilayered composites is completely suppressed by architecting nanoscale BCC Nb crystalline-amorphous CuNb interfaces.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2024)