Article
Materials Science, Multidisciplinary
Cheng-Yao Huang, Hung-Wei Yen
Summary: This study investigated nano precipitates in stainless maraging steel (Custom 475) using high-resolution transmission electron microscopy. The aging process in this steel results in the formation of NiAl-B2 phase, R phase, and austenite, with different hardening effects depending on the aging temperature. Efficient hardening was achieved by aging at 520 degrees C for 4 hours, leading to the formation of both B2 and R nano precipitates and achieving maximum hardness of 601 HV.
MATERIALS CHARACTERIZATION
(2021)
Article
Materials Science, Multidisciplinary
Chang Tian, Hui Guo, Masato Enomoto, Chengjia Shang
Summary: The evolution of Cu particles in Cu-bearing Mn steel was studied, showing that most Cu particles were formed in the martensite matrix during heating to annealing temperature. Calculation indicated that Cu particles in annealed martensite were likely incorporated into reversed austenite with the migration of alpha/gamma interface during annealing.
MATERIALS CHARACTERIZATION
(2022)
Article
Materials Science, Multidisciplinary
S. S. Xu, X. H. Lu, S. C. Liu, L. Chen, Y. Zhang, X. Z. Li, Z. W. Zhang
Summary: The precipitation strengthening of Cu/NiAl co-precipitates in martensite-austenite dual-phase steels under aging treatment was studied, showing that in the peak aging state, the co-precipitates contribute to an increase in yield strength and uniform elongation. The strengthening mechanisms mainly involve shearing and Orowan looping, with their contributions related to the martensitic phase content.
MATERIALS CHARACTERIZATION
(2021)
Article
Engineering, Manufacturing
Xingyuan Mei, Yu Yan, Huadong Fu, Xiaodong Gao, Shiyu Huang, Lijie Qiao
Summary: This study investigated the microstructure evolution of 18Ni(300) maraging steel during laser-powder bed fusion. It evaluated the changes in cell structure, precipitation sequence, and austenite reversion at different aging temperatures. The study found that the yield strength of the steel was mainly influenced by the martensite lath and solid solution strengthening, as well as by the presence of omega particles, Ni3Ti particles, and reverted austenite.
ADDITIVE MANUFACTURING
(2022)
Article
Nanoscience & Nanotechnology
Maryam Soleimani, Hamed Mirzadeh
Summary: Cross rolling and intercritical annealing is proposed as an alternative processing route for dual-phase steels, resulting in refined ferrite grains and evenly distributed martensite islands. This processed low-carbon steel exhibits improved strength-ductility balance, higher hardness, and greater work hardening exponent.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2021)
Article
Nanoscience & Nanotechnology
Ludmila Kucerova, Karolina Burdova, Stepan Jenicek, Iveta Chena
Summary: This study investigates the effect of broader tempering temperatures on the post-processing heat treatment of additively manufactured maraging steel, and compares the results with conventionally produced maraging steel. Different initial conditions lead to distinct microstructures and properties in the samples even after precipitation hardening at the highest tempering temperature.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2021)
Article
Materials Science, Multidisciplinary
Honglin Zhang, Mingyue Sun, Yuxuan Liu, Dongping Ma, Bin Xu, Mingxin Huang, Dianzhong Li, Yiyi Li
Summary: A novel heat treatment route is proposed to develop a high-strength, high-cryogenic-toughness maraging steel with an ultrafine-grained martensite and austenite dual-phase microstructure. This dual-phase microstructure significantly increases the cryogenic impact energy while maintaining high yield strength. The steel with a large volume fraction of ultrafine-grained austenite exhibits comparable yield strength to conventional maraging steel, thanks to intensive nanoprecipitates in both martensite and austenite phases.
Article
Materials Science, Multidisciplinary
X. H. Lu, S. S. Xu, L. Chen, Z. J. Wang, Z. W. Zhang, S. C. Liu, X. Z. Li
Summary: The precipitation behavior of Cu/Ni(Mn,Al) co-precipitates in medium-Mn dual-phase (DP) steels was investigated using atom probe tomography (APT) and small-angle neutron scattering (SANS). The study found that high Mn content in the DP steel promoted the partition of Mn to NiAl nanoprecipitates, thus forming Cu/Ni(Mn,Al) co-precipitates in the martensite. The growth of the co-precipitates was not controlled by volumetric diffusion, but by the coupled diffusion of multiple chemical elements induced by synergistic phase transformation. The coarsening coefficient of the co-precipitates in the DP steel was ten times higher than in previous martensitic steel, leading to a change in precipitation strengthening effect. The mechanism for the co-precipitates' coarsening was also addressed and discussed.
Article
Chemistry, Physical
Yifan Wang, Yanli Lu, Shiyao Zhang, Haipeng Zhang, Hong Wang, Zheng Chen
Summary: Through TEM and tensile testing, the microstructure of nanoscale precipitates formed in the primary a-Al grains of a cast Al-7Si-Mg alloy during ageing at different temperatures has been systematically investigated. The interactions of dislocations with different types of precipitates were analyzed, revealing the strengthening effects on mechanical properties. The study also discussed the moire fringes and FFT pattern of beta phase, as well as the unique phenomenon of beta phase nucleation and growth on the surface of Si particles.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Materials Science, Multidisciplinary
Stefan Zeisl, Nele Van Steenberge, Ronald Schnitzer
Summary: One class of maraging steels is strengthened by the precipitation of beta-NiAl and eta-Ni3Ti intermetallic phases during aging heat treatment. To establish a meaningful structure-property relationship, the individual precipitation strengthening effect of each phase needs to be determined. Atom probe tomography was utilized in this study to determine the spacing between precipitates and calculate the individual strength contribution of the beta and eta phases using a model for precipitate-dislocation interactions. The results showed that the combined precipitation strengthening effect of the beta and eta phases is close to 1000 MPa, and the relative strengthening effect of each phase is influenced by the Ti and Al concentration.
JOURNAL OF MATERIALS SCIENCE
(2023)
Article
Materials Science, Multidisciplinary
X. S. Liu, R. Lia, X. F. Fan, Q. Q. Liu, X. Tong, A. X. Lia, S. Xu, H. Yang, S. B. Yu, M. H. Jiang, C. Huo, P. F. Yu, M. T. Dove, G. Li
Summary: In this study, dual-morphology B2 precipitates were obtained by thermo-mechanical processing in Co36Cr15Fe18Ni18Al8Ti4Mo1 MPEA. The dual-morphology B2 precipitates were found to enhance the yield strength and ultimate tensile strength significantly, suggesting the potential for optimizing the mechanical properties of the alloy.
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
(2023)
Article
Engineering, Chemical
Jingyi Zhou, Liguang Zhu, Bo Wang, Ligen Sun, Pengcheng Xiao
Summary: Reasonable control of niobium (Nb) content in steel slab is important for improving slab strength and precipitate regularity. This study analyzed the high-temperature strength and precipitates of steel with different Nb contents (A: 0.006%, B: 0.031%, C: 0.050%, D: 0.065%). The results showed that a Nb content of 0.031% led to ideal tensile and yield strength. Precipitates in the steel were mainly square- and star-shaped (Ti, Nb) (C, N) composites, with the amount increasing with Nb content. Most of the precipitates in the steel with 0.031% Nb content were smaller than 80 nm, and increasing Nb content only increased particle size, not quantity.
Article
Chemistry, Physical
Litao Liu, Bin Fu, Yanhui Guo, Liqun Wei
Summary: In this study, a multi-step cyclic rolling and intercritical annealing process was proposed for dual-phase steel, which resulted in a more uniform distribution of ferrite-martensite compared to the single-step process, leading to improved ductility.
Article
Materials Science, Multidisciplinary
Yao Xu, Brajendra Mishra, Sneha P. Narra
Summary: Wire arc additive manufacturing is a suitable manufacturing process for large-scale components due to its high deposition rates and low feedstock costs. However, the thermal cycles and heat accumulation in this process can result in microstructural transformations, making it necessary to study the process-structure-property relations.
MATERIALS CHARACTERIZATION
(2022)
Article
Materials Science, Multidisciplinary
Yunlong Yao, Shichao Xiu, Cong Sun, Yuan Hong, Zhuangzhuang Hou, Xiannan Zou
Summary: This study investigates the grinding temperature and strain distribution of the ground strengthening layer (GSL) and characterizes the microstructure of the ground-modified layer. It is found that grind-strengthening technology utilizes grain refinement and phase transformation mechanisms to create a strength-ened layer of graded martensite structure with high micro-hardness and residual compressive stress.
MATERIALS CHARACTERIZATION
(2023)
Article
Materials Science, Multidisciplinary
Daixiu Wei, Liqiang Wang, Yongjie Zhang, Wu Gong, Tomohito Tsuru, Ivan Lobzenko, Jing Jiang, Stefanus Harjo, Takuro Kawasaki, Jae Wung Bae, Wenjun Lu, Zhen Lu, Yuichiro Hayasaka, Takanori Kiguchi, Norihiko L. Okamoto, Tetsu Ichitsubo, Hyoung Seop Kim, Tadashi Furuhara, Evan Ma, Hidemi Kato
Summary: Recently-developed high-entropy alloys (HEAs) have expanded the compositional space and mechanical properties by substituting the constituent metals with metalloids. Metalloid substitution increases strength by increasing local lattice distortion and short-range chemical inhomogeneities, while reducing stacking fault energy to discourage dynamic recovery.
Article
Materials Science, Multidisciplinary
B. X. Cao, D. X. Wei, X. F. Zhang, H. J. Kong, Y. L. Zhao, J. X. Hou, J. H. Luan, Z. B. Jiao, Y. Liu, T. Yang, C. T. Liu
Summary: This study investigates the embrittlement of high-entropy alloys at intermediate temperatures, revealing the temperature-dependent tensile failure mechanism and emphasizing the role of heterogeneous strain distribution and environmental attack.
MATERIALS TODAY PHYSICS
(2022)
Article
Nanoscience & Nanotechnology
Daixiu Wei, Wu Gong, Takuro Kawasaki, Stefanus Harjo, Hidemi Kato
Summary: This study proposes a strategy to significantly enhance the strength of TWIP high-entropy alloys (HEAs) while maintaining satisfactory ductility by tuning the substructures. The strength of a representative TWIP HEA was improved through cryogenic pre-deformation-induced dislocations, martensite, nanotwins, and stacking faults. The influence of regulated microstructures on yield strength was clarified, and the tensile properties of the HEA were improved through subsequent annealing.
SCRIPTA MATERIALIA
(2022)
Article
Chemistry, Physical
Hailong Yi, Renyi Xie, Yifan Zhang, Liqiang Wang, Min Tan, Tao Li, Daixiu Wei
Summary: This study investigates the microstructure and mechanical performance of a high-performance Co-rich TRIP-HEA through thermomechanical processing. The results show that grain refinement is an effective strategy to enhance strength while maintaining ductility.
Article
Materials Science, Multidisciplinary
Yintao Zhang, Jia Liu, Liqiang Wang, Daixiu Wei, Changxi Liu, Kuaishe Wang, Yujin Tang, Ling Zhang, Weijie Lu
Summary: In this study, porous NiTi-Nb alloys fabricated via laser powder bed fusion were reported to achieve a synergistic strength-ductility enhancement by modulating the eutectic microregion through heat treatment. The heat-treated porous NiTi-Nb alloys exhibited ultra-high compressive strength and good ductility compared to the as-built sample.
Article
Materials Science, Multidisciplinary
Yanjie Xia, Zhen Lu, Jiuhui Han, Fan Zhang, Daixiu Wei, Kentaro Watanabe, Mingwei Chen
Summary: Dealloying is a method for fabricating porous materials by manipulating the interaction of elements in an alloy. This study reveals that the formation of open pores in Cu12Zn88 alloy during high-temperature vapor phase dealloying is regulated by bulk alloy diffusion.
Article
Engineering, Mechanical
Daixiu Wei, Wu Gong, Tomohito Tsuru, Takuro Kawasaki, Stefanus Harjo, Biao Cai, Peter K. Liaw, Hidemi Kato
Summary: This study investigated the yielding and hardening behaviors of high-entropy alloys (HEAs) using in situ neutron diffraction, first-principles method, and electron microscopy. The research found that high shear modulus and grain refinement can improve the yield strength of HEAs, while a larger dislocation density and stacking faults contribute to higher flow stresses and better ductility. Furthermore, low stacking fault energy promotes mechanical twinning and martensitic transformation, further enhancing the strain-hardening rate of HEAs.
INTERNATIONAL JOURNAL OF PLASTICITY
(2022)
Article
Multidisciplinary Sciences
Ruirui Song, Jiuhui Han, Masayuki Okugawa, Rodion Belosludov, Takeshi Wada, Jing Jiang, Daixiu Wei, Akira Kudo, Yuan Tian, Mingwei Chen, Hidemi Kato
Summary: This study presents the fabrication of nanoporous intermetallic catalysts via liquid metal dealloying, which exhibit high electrocatalytic activity and durability in hydrogen production. The research sheds light on the intermetallic effect in dealloying, providing new insights for the development of advanced intermetallic catalysts for energy applications.
NATURE COMMUNICATIONS
(2022)
Editorial Material
Biotechnology & Applied Microbiology
Liqiang Wang, Lechun Xie, Daixiu Wei
FRONTIERS IN BIOENGINEERING AND BIOTECHNOLOGY
(2022)
Article
Engineering, Mechanical
Daixiu Wei, Wu Gong, Tomohito Tsuru, Ivan Lobzenko, Xiaoqing Li, Stefanus Harjo, Takuro Kawasaki, Hyeon-Seok Do, Jae Wung Bae, Christian Wagner, Guillaume Laplanche, Yuichiro Koizumi, Hiroki Adachi, Kenta Aoyagi, Akihiko Chiba, Byeong-Joo Lee, Hyoung Seop Kim, Hidemi Kato
Summary: This study demonstrates that the addition of silicon to CoCrFeNi HEA can improve its performance by maintaining a single-phase FCC structure while simultaneously increasing strength and ductility. The addition of silicon enhances solid solution strengthening, reduces SFE, and improves dislocation behavior and plastic deformation mechanisms.
INTERNATIONAL JOURNAL OF PLASTICITY
(2022)
Article
Materials Science, Multidisciplinary
Daixiu Wei, Wu Gong, Liqiang Wang, Bowen Tang, Takuro Kawasaki, Stefanus Harjo, Hidemi Kato
Summary: This study demonstrates a strategy to enhance the room-temperature strength of face-centered cubic-phase high-entropy alloys and medium-entropy alloys by adjusting the temperature-dependent stacking fault energy-regulated plasticity mechanism. The results show that the cryo-rolling-induced crystal defects significantly increase the room-temperature yield strength of an equiatomic CoCrFeNi high-entropy alloy, while maintaining good tensile elongation.
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
(2022)
Article
Nanoscience & Nanotechnology
Jiwei Lv, Haoyang Yu, Wei Fang, Fuxing Yin, Daixiu Wei
Summary: This study investigates the influence of prestrain-induced dislocations on the formation of both coherent and incoherent precipitates in medium-entropy alloys (MEAs). The results show that prestrain increases the formation of incoherent precipitates and refines their size, while having little effect on the formation of coherent precipitates. By regulating the formation of precipitates, the room-temperature tensile properties of the alloy are improved.
SCRIPTA MATERIALIA
(2023)
Article
Engineering, Manufacturing
Junyi Feng, Daixiu Wei, Peilei Zhang, Zhishui Yu, Changxi Liu, Weijie Lu, Kuaishe Wang, Hua Yan, Laichang Zhang, Liqiang Wang
Summary: Biological high-entropy alloy (Bio-HEA) is a promising biomedical alloy with excellent mechanical properties and biocompatibility. Selective laser melting (SLM) technique is used to fabricate dense blocks with low Young's modulus and good compression property at room temperature. Triply periodic minimal surface (TPMS) lattice in the HEA structure, with Young's modulus close to that of human trabecular bone, allows for customization of shape and porosity, enabling Bio-HEA to meet various bone implant requirements.
JOURNAL OF MANUFACTURING PROCESSES
(2023)
Article
Materials Science, Multidisciplinary
Zhongtao Li, Shihua Ma, Shijun Zhao, Weidong Zhang, Fei Peng, Qian Li, Tao Yang, Chia-Yi Wu, Daixiu Wei, Yi-Chia Chou, Peter K. Liaw, Yanfei Gao, Zhenggang Wu
Summary: By maximizing the volume misfits, a single-phase Ni-based FCC alloy with a superb yield strength (-1.05GPa) and good ductility (37%) is designed. This study provides two surprising and novel findings for single-phase FCC alloys: volume misfit is a good relevant indicator of kHP, and screw dislocations can contribute to strengthening once the solute-induced stress field reaches a critical value.
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)
