Review
Metallurgy & Metallurgical Engineering
Yujin Nie, Jianwei Dai, Xuan Li, Xiaobo Zhang
Summary: Corrosion is a major drawback for the wide applications of Mg alloys, with attention being drawn to the corrosion behaviors of alloys with stacking fault or long period stacking ordered structures. However, the corrosion mechanisms of these alloys remain unclear, calling for further research and improvement.
JOURNAL OF MAGNESIUM AND ALLOYS
(2021)
Article
Materials Science, Multidisciplinary
Ning Su, Qingchen Deng, Yujuan Wu, Liming Peng, Kun Yang, Qiang Chen
Summary: This paper investigates the dissolution, refinement, and re-precipitation of LPSO structure/SFs in an Mg-Gd-Zn-Mn alloy through hot extrusion. The results suggest that refinement is dominated by the misalignment and re-dissolution mechanisms, with dislocation slips and rapid solute atom diffusion playing key roles. The evolution model of LPSO structure/SFs during continuous dynamic recrystallization is proposed based on the findings.
MATERIALS CHARACTERIZATION
(2021)
Article
Materials Science, Multidisciplinary
Xuesong Xu, Hongsheng Ding, Haitao Huang, He Liang, Hao Guo, Ruirun Chen, Jingjie Guo, Hengzhi Fu
Summary: By means of directional solidification and microalloying, a TiAl alloy with a fine and uniform microstructure and continuous columnar crystals was obtained. The microalloyed high Nb containing TiAl alloy exhibited better creep properties at high temperature and stress conditions.
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
(2022)
Article
Materials Science, Multidisciplinary
Jae-Yeon Kim, Ki-Tae Yoo, Jai-Won Byeon
Summary: In this study, the effects of discontinuous precipitate (DP) and continuous precipitate (CP) on the tensile elongation and fracture mechanism of aging-treated AZ91D Mg alloy were investigated. The increase in area fraction of DPs was found to cause a slight decrease in tensile elongation due to cracking along grain boundaries. Experimental results also showed that a large number of fine tension twins were produced within a few percent of tensile elongation for specimens with high CP/alpha-Mg interfaces per unit volume, leading to premature fracture.
MATERIALS CHARACTERIZATION
(2021)
Article
Nanoscience & Nanotechnology
Michiaki Yamasaki, Tsuyoshi Mayama, Tsubasa Matsumoto, Koji Hagihara, Daria Drozdenko, Yoshihito Kawamura
Summary: The dislocation configuration around the 0001 0001 a 0001 a a slip system was successfully reproduced through crystal plasticity finite element analysis. Despite the formation of kink bands stimulated by the prismatic slip system, geometrical softening should be significant.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2021)
Article
Materials Science, Multidisciplinary
Xixi Qi, Yangxin Li, Xinyu Xu, Yuxuan Liu, Huan Zhang, Qingchun Zhu, Gaoming Zhu, Jingya Wang, Mingxin Huang, Xiaoqin Zeng
Summary: The strength-ductility trade-off dilemma is difficult to avoid in high-strength Mg alloys, especially those with a high volume fraction of precipitates. This paper reports an enhanced strength-ductility synergy in an aged Mg-7.37Gd-3.1Y-0.27Zr alloy at sub-zero temperatures. The study reveals that a high dislocation density and shearable precipitates contribute to the excellent strength-ductility synergy.
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
(2023)
Article
Materials Science, Multidisciplinary
Qiang Yang, Shuhui Lv, Zixiang Yan, Xiru Hua, Xin Qiu, Jian Meng
Summary: This study reveals strong ductility asymmetry in extruded Mg alloys containing LPSO plates, which is mainly caused by deformation steps in LPSO plates, contributing significantly to compressive ductility. The results provide fundamental insights into deformation modes and mechanisms of thin LPSO plates, as well as a better understanding of the ductility asymmetry in extruded Mg alloys containing LPSO plates.
MATERIALS & DESIGN
(2021)
Article
Engineering, Mechanical
Valery V. Borovikov, Mikhail I. Mendelev, Timothy M. Smith, John W. Lawson
Summary: MD simulations show that a different mechanism for twin nucleation and growth can compete with the Kolbe mechanism in the temperature range of 600-800 degrees C.
INTERNATIONAL JOURNAL OF PLASTICITY
(2023)
Article
Nanoscience & Nanotechnology
Quan Li, Jian Song, Yiwen Chen, Qi Zhang, Qingchun Zhu, Yue Liu, Jian Wang, Xiaoqin Zeng
Summary: Long-period stacking ordered (LPSO) phases effectively enhance the strength of Mg alloys by inhibiting the motion of non-basal dislocations and deformation twins. It was previously believed that LPSO phases do not affect the motion of basal dislocations. However, through in-situ TEM nanoindentation testing in a Mg97Y2Zn alloy, it was observed that the activity of basal dislocations is significantly reduced between LPSO phases with spacing less than 20 nm. Atomic HADDF-STEM results also revealed a high concentration of solute atoms near LPSO phases, which could contribute to strong solute strengthening. These findings have potential implications for the design of ultra-high strength Mg alloys containing nano-spaced LPSO phases.
SCRIPTA MATERIALIA
(2023)
Article
Materials Science, Multidisciplinary
Zixiang Yan, Qiang Yang, Fanzhi Meng, Rui Ma, Rirong Bao, Xiaojuan Liu, Jian Meng, Xin Qiu
Summary: In this study, interfacial precipitation in {10 (1) over bar2} twin boundaries of a cold-stamped Mg-12Gd-1.2Zn-0.4Zr alloy was investigated, revealing the formation of new interfacial phases which accelerated peak-aging and improved the alloy's strength. This periodic segregation of Gd + Zn atoms in the twin boundaries played a crucial role in enhancing the mechanical properties of the alloy.
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
(2021)
Article
Materials Science, Multidisciplinary
Yongkun Mu, Lunhua He, Sihao Deng, Yuefei Jia, Yandong Jia, Gang Wang, Qijie Zhai, Peter K. Liaw, Chain-Tsuan Liu
Summary: In this study, a combination of high-density dislocation structures and high-volume-fraction ductile nano-precipitates was successfully achieved in a high-entropy alloy using a three-dimensional printing technique. The resulting structure, known as the dislocation-precipitate skeleton architecture, demonstrated ultra-high tensile strength and significant ductility, which were attributed to the synergistic strengthening of dislocation-precipitation and the evolution of multiple stacking fault structures.
Article
Materials Science, Multidisciplinary
Qianqian Jin, Xiaohong Shao, Shijian Zheng, Yangtao Zhou, Bo Zhang, Xiuliang Ma
Summary: Understanding the interface structure between strengthening precipitates and matrix in alloys at the atomic level is crucial for tailoring the mechanical properties. High-resolution scanning transmission electron microscopy was used to study the semi-coherent interfaces in Mg-Zn-Y alloys, revealing unique features such as Shockley partial dislocations and dissociated structures. The interaction between dislocation arrays and solute atoms plays a key role in the stability and morphology of these interfaces, influencing the lateral growth of LPSO phases in Mg alloys.
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
(2021)
Article
Materials Science, Multidisciplinary
Xiaodong Yang, Baolong Liu, Xiaojie Zhou, Weiying Huang, Liwei Lu, Xianzheng Lu, Yaru Liu
Summary: This study compares the performance of Mg-5Gd-3Y-2Zn-0.5Zr alloy with Mg-5Gd-3Y-1Zn-0.5Zr alloy. It is found that increasing the Zn content can induce the formation of more LPSO phases but has a negative impact on workability.
JOURNAL OF MATERIALS ENGINEERING AND PERFORMANCE
(2023)
Article
Nanoscience & Nanotechnology
Liyuan Liu, Yang Zhang, Jingming Ma, Yongxuan Shang, Jihong Han, Junpeng Li, Zhongwu Zhang
Summary: Controlling precipitation can tune the deformation mechanism of high-entropy alloys, thereby improving the synergy between strength and plasticity.
SCRIPTA MATERIALIA
(2022)
Article
Nanoscience & Nanotechnology
Cheng Liu, Xiaohua Yang, Jianchao Peng, Bin Liu, Qun Luo, Qian Li, Kuo-Chih Chou
Summary: The deformation behaviors of a dual-phase Mg alloy containing α-Mg and 18R-LPSO phases were investigated in this study. The 18R phase, accounting for 11.3 vol.%, contributed to 23.0% of the overall alloy deformation. The coordinated twinning deformation of α-Mg matrix through the slip of basal dislocations and the kinking deformation of Mg slices induced by the 18R phase were observed during the early stage of deformation. At the end of deformation, a large number of T2-type stacking faults were generated, improving the ductility of the alloy. This work provides a novel strategy for designing high-strength and good ductility dual-phase Mg alloys.
SCRIPTA MATERIALIA
(2023)
Article
Chemistry, Physical
Sabry S. Youssef, Xiaodong Zheng, Sensen Huang, Yingjie Ma, Min Qi, Shijian Zheng, Jiafeng Lei, Rui Yang
Summary: The precipitation behavior of Ti3Al and its effect on the tensile properties and fracture toughness of Ti-8Al alloy were studied. The increase in the volume fraction of alpha(2) enhanced alloy strength but decreased ductility and fracture toughness. The findings emphasize the importance of tailoring alpha(2) precipitation in designing high-performance titanium alloys for structural applications.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Nanoscience & Nanotechnology
Xinfang Zhang, Shuai Zhou, Hexiong Zhang, Xuebing Liu, Huajie Yang
Summary: The study investigated the relationship between Luders strain and average grain size in an Al-5.16Zn-2.2Mg1.46Cu alloy under pulsed electric current. It was found that Luders strain increases as average grain size decreases, and the current parameter significantly affects the Hall-Petch-like relationship. A mathematical model was established to explore the competition between solute atom pinning and dislocation depinning behaviors under different current densities, showing a significant impact on Luders strain.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2021)
Article
Materials Science, Multidisciplinary
Y. T. Zhou, X. H. Shao, S. J. Zheng, X. L. Ma
Summary: This study investigated the atomic structures of cementite/ferrite interfaces in cold-drawn pearlitic steel wire using transmission electron microscopy. The findings revealed that the deformation-induced partial decomposition of cementite plays a crucial role in interface reconstruction, while the amorphization of cementite layers effectively eliminates interfacial dislocations and reduces interfacial stress.
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
(2022)
Article
Materials Science, Multidisciplinary
N. Zhang, H. J. Yang, X. H. Shao
Summary: Grain refinement and intermetallic particle fragmentation achieved through ECAP led to a unique microstructure with improved mechanical properties in the Mg-12Gd-3Y-0.5Zr alloy, showing high strength and elongation to failure at elevated temperatures.
PHILOSOPHICAL MAGAZINE LETTERS
(2022)
Article
Nanoscience & Nanotechnology
Huhu Su, Xinzhe Zhou, Shijian Zheng, Hengqiang Ye, Zhiqing Yang
Summary: The formation and evolution of basal-prismatic/prismatic-basal (BP/PB) interfaces in a Mg alloy under cyclic deformation were studied and modeled based on atomic-resolution experimental observations and interfacial defects theory. It was found that BP/PB interfaces could be formed by emission of specific dislocations and twinning disconnections, and could transform into twin boundaries. The experimental results offer insights into the dislocation-assisted mechanisms of formation and evolution of BP/PB interfaces in hexagonal-close-packed materials.
SCRIPTA MATERIALIA
(2022)
Article
Engineering, Mechanical
B. S. Gong, Z. J. Zhang, Z. Qu, J. P. Hou, H. J. Yang, X. H. Shao, Z. F. Zhang
Summary: The aging conditions have significant effects on the fatigue properties of wrought Al alloys. Overaged samples show the highest fatigue strength due to the easy accumulation and annihilation of dislocations at the second phase boundaries, as well as the discontinuous distribution of grain boundary precipitates and the increased width of the precipitate-free zone.
INTERNATIONAL JOURNAL OF FATIGUE
(2022)
Article
Metallurgy & Metallurgical Engineering
Yu-Juan Geng, Chun-Yang Wang, Jing-Xin Yan, Zhen-Jun Zhang, Hua-Jie Yang, Jin-Bo Yang, Kui Du, Zhe-Feng Zhang
Summary: The movement and dissociation of dislocations play a significant role in understanding the plastic deformation mechanisms and mechanical properties of metals. Previous beliefs about the dissociation of dislocations in Au have been proven wrong, as new atomistic modeling and experimental observations show that this reaction can be completely suppressed. The deviation of Burgers vectors of partials from Shockley partials depends heavily on the tilt angle, which has important implications for better understanding face-centered cubic metals (FCC).
ACTA METALLURGICA SINICA-ENGLISH LETTERS
(2022)
Article
Multidisciplinary Sciences
Kaisheng Ming, Zhengwang Zhu, Wenqing Zhu, Ben Fang, Bingqiang Wei, Peter K. Liaw, Xiaoding Wei, Jian Wang, Shijian Zheng
Summary: Crystalline-amorphous composites have the potential to achieve high strength and high ductility. Researchers fabricate a TiZr-based alloy with micrometer-size equiaxed grains that are made up of three-dimensional bicontinuous crystalline-amorphous nanoarchitectures. In situ tension and compression tests reveal enhanced ductility and strain hardening capability, providing ultra-high yield strength, ultimate tensile strength, and large uniform ductility to the alloy. Experiments combined with simulations reveal the synergetic deformation mechanisms, resulting in an effective combination of strength, ductility, and strain hardening.
Article
Nanoscience & Nanotechnology
X. H. Shao, H. J. Yang, Q. Q. Jin, Y. Y. Song, J. Wang, B. Zhang, X. L. Ma
Summary: By extrusion and double aging, homogenous nanosized precipitates were introduced into a Mg alloy, leading to improved strength and ductility. The study identified two types of nanoprecipitates and revealed their contributions to the alloy properties.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2022)
Article
Chemistry, Physical
Dandan Ben, Huajie Yang, Jiabao Gao, Bingyu Yang, Yu'ang Dong, Xiangyu Liu, Xuegang Wang, Qiqiang Duan, Peng Zhang, Zhefeng Zhang
Summary: The study found that rapid changes in microstructure of the laser melting deposition (LMD) additive-manufactured Ti-6.5Al-3.5Mo-1.5Zr-0.3Si alloy (TC11) can be achieved through electropulsing treatment (EPT), resulting in a more homogeneous structure. Additionally, EPT also slightly impacted the tensile properties of the sample.
Article
Nanoscience & Nanotechnology
Yunrui Ma, Manling Dong, Jinfeng Geng, Weifeng Xin, Lingxiao Meng, Huajie Yang, Zhefeng Zhang
Summary: Researchers have been exploring efficient and energy-saving heat treatment methods. In this study, the microstructure and mechanical properties of 316L stainless steel were measured through electropulsing treatment and annealing treatment. The results showed that both treatments had significant effects on the grain structure and mechanical properties of the stainless steel.
Article
Engineering, Mechanical
Chenwei Shao, Xinqiang Zhang, Shuo Zhao, Yankun Zhu, Huajie Yang, Yanzhong Tian, Zhenjun Zhang, Peng Zhang, Xianghai An, Zhefeng Zhang
Summary: This study proposes a crack growth model for LCF to enhance the LCF performance of engineering structural materials. By introducing strength gradient architecture and investigating the influences of strength/microstructure, it is found that TWIP steel with negative strength gradient exhibits excellent LCF properties.
INTERNATIONAL JOURNAL OF PLASTICITY
(2022)
Article
Materials Science, Multidisciplinary
Bingyu Yang, Huajie Yang, Zhihai Cai, Dandan Ben, Jun Liu, Xiaohong Shao, Peng Zhang, Zhefeng Zhang
Summary: Laser metal deposition (LMD) is used to produce a TC11 titanium alloy with inhomogeneous multiscale grain morphology and mechanical properties. The melting pool morphology is divided into three areas: melting pool center, melting pool boundary, and heat-affected zone. The widths of α laths in the melting pool boundary are larger, resulting in lower microhardness. The columnar grains are distributed along the deposition direction. The mechanical properties show inhomogeneity between the top and bottom samples, and the initiation fracture sites are presumed to be the α lath inside the melting pool boundary.
ADVANCED ENGINEERING MATERIALS
(2023)
Article
Nanoscience & Nanotechnology
C. Xua, H. Q. Liuc, C. H. Li, H. J. Yanga, X. H. Shao, X. L. Ma
Summary: The internal tensile deformation of the individual base metal zone (BM), heat-affected zone (HAZ), and fusion zone (FZ) in a titanium alloy (Ti-5Al-2Sn-2r-4Mo-4Cr, wt.%) electron beam welding (EBW) joint is investigated. The formation of a ghost structure with a hierarchical cluster structure within the initial & alpha;P grains is observed in HAZ. The needle-shaped thermal martensite formed during EBW causes the premature failure of FZ.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2023)
Article
Chemistry, Physical
Jie Liu, Huajie Yang, Lingxiao Meng, Di Liu, Tianqi Xu, Daokui Xu, Xiaohong Shao, Chenwei Shao, Shujun Li, Peng Zhang, Zhefeng Zhang
Summary: The hydrogen embrittlement behavior of a selective laser-melted (SLM) 316L austenitic stainless steel was investigated through hydrogen charging experiments and slow strain rate tensile tests. The results showed that the ductility of the specimens was significantly reduced after electrochemical hydrogenation, while the strength only slightly decreased. Quasi in situ EBSD observation revealed an increased density of low angle grain boundaries in the samples after hydrogen charging. The presence of hydrogen-induced cracks along the melt pool boundaries indicated that these boundaries were the preferred areas for hydrogen accumulation and transfer.
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)