Article
Materials Science, Multidisciplinary
Zejian Xu, Yang Han, Changzeng Fan, Xiaodong He, P. J. Tan, Fenglei Huang
Summary: The study investigates the dynamic mode II fracture characteristics of Ti-6Al-4V using a novel 2-bar/double-shear impact loading technique. Results show varying fracture mechanisms at different loading rates, influencing the dominant failure mechanism of the material.
MECHANICS OF MATERIALS
(2021)
Article
Nanoscience & Nanotechnology
Xinjie Zhu, Qunbo Fan, Duoduo Wang, Haichao Gong, Yu Gao, Jingjiu Yuan, Kai Chen, Feng Qian
Summary: The study on the microstructure evolution near adiabatic shear bands (ASBs) in titanium alloys has made significant progress, but the underlying mechanism is still not clear. This study conducted dynamic compression tests on a specific titanium alloy and carefully investigated its microstructures using advanced microscopy techniques. The results revealed a new dynamic recrystallization mechanism in the central region of ASBs, shedding light on the understanding of ASB evolution. Additionally, the study found that the presence of twins in certain regions was influenced by severe deformation and the instability of certain phases.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2022)
Article
Materials Science, Multidisciplinary
Wei Chen, Yuming Liu, Linli Gang, Libo Zhou, Wei Qiu, Yanjie Ren, Yan Niu, Jian Chen, Cong Li
Summary: The microstructure evolution of near p-Ti alloys with initially lamellar and equiaxed microstructures under dynamic loading was investigated. It was found that equiaxed microstructure is more prone to shear failure during high strain rate compression. Recrystallization and remelting of the lamellar a phase occurred in the adiabatic shear band (ASB) zone due to temperature rise and stress concentration, while the equiaxed a phase transformed into strip-shaped structure along the propagating direction of the adiabatic shear band. Twinning transfer between the p matrix and a phase was observed during high strain rate loading, indicating that twinning is the dominant deformation mode.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2023)
Article
Nanoscience & Nanotechnology
Jiawei Lu, Ryan Khawarizmi, Miguel Monclus, Jon Molina-Aldareguia, Patrick Kwon, Thomas R. Bieler
Summary: The hardness and orientations of the primary αp and transformed βt grains in segmented chips obtained by turning Ti-6Al-4V bar were analyzed. The hardness of αp grains highly depends on the crystal orientation, varying from 4.5 GPa to 6.7 GPa. In the machined chips, αp grains showed similar hardness values while βt grains became slightly harder. The width of shear bands in the chips varied and smaller shear strain was correlated with larger shear cracks.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2023)
Article
Nanoscience & Nanotechnology
Jincai Dai, Xiaohua Min, Lin Wang
Summary: This study investigated the dynamic compressive properties and adiabatic shear behavior of beta-type Ti-10Mo, Ti-15Mo, and Ti-22.5Mo alloys. The deformation modes of these alloys did not change significantly under both quasi-static and dynamic conditions. The yield strength of the alloys increased remarkably with the rise in strain rate, showing the strain rate strengthening effect. The formation of adiabatic shear bands was delayed by the {332}<113> twinning deformation, which consumed more impact energy.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2022)
Article
Engineering, Multidisciplinary
Dong-yang Qin, Ying-gang Miao, Yu-long Li
Summary: The influence of initial microstructures on the adiabatic shear behavior of Ti-5553 alloy was investigated using experimental methods. It was found that the lamellar alloy tended to form adiabatic shearing band (ASB), while the bimodal alloy was ASB-resistant. The microstructure of ASB changed dramatically compared to the initial microstructure of the alloy.
DEFENCE TECHNOLOGY
(2022)
Article
Chemistry, Physical
Zhu-Ye Zhang, Dong-Rong Liu, Zhen-Peng Pu
Summary: This study systematically investigates the effects of different strain rates on the deformation of the microstructure and deformation mechanism of Ti-1300 alloys using high-speed tensile technology, and clarifies the relationship between the microstructure and mechanical properties. The results show that no phase transformation occurs during the high-speed tensile process at strain rates of 200 s(-1) and 500 s(-1). The deformation mechanism is mainly due to dislocation slip, and the fracture mode is ductile fracture at these strain rates due to the connection between micro-voids promoted by dislocation slip. The ultimate tensile strengths, yield strengths, and elongations are also measured.
Article
Engineering, Mechanical
D. J. Magagnosc, J. T. Lloyd, C. S. Meredith, A. L. Pilchak, B. E. Schuster
Summary: The study reported the first in situ X-ray diffraction observations of DRX, revealing that DRX initiation is driven by accumulation of plastic strain rather than temperature rise. The results showed a continuous evolution of microstructure with increasing plastic strain, until reaching maximum stress.
INTERNATIONAL JOURNAL OF PLASTICITY
(2021)
Article
Materials Science, Multidisciplinary
Kai Chen, Qunbo Fan, Lin Yang, Jiahao Yao, Shun Xu, Wei Lei, Yu Gao
Summary: In this study, a novel metastable beta titanium alloy Ti-6Mo-3.5Cr-1Zr was developed by controlling the phase stability. The alloy exhibited high compressive strength and malleability during dynamic compressions. The microstructural evolution and adiabatic shearing behavior of the alloy were investigated, providing insights into the dynamic deformation mechanism and adiabatic shearing behavior of metastable beta titanium alloys.
MATERIALS & DESIGN
(2022)
Article
Nanoscience & Nanotechnology
Zhicheng Zhu, Zhiyong Chen, Renke Wang, Chuming Liu
Summary: The mechanical behavior and microstructure characteristics of pure titanium with hat-shaped specimens under quasi-static and dynamic loading were investigated and compared. The study found that dynamic specimens exhibited higher yield stress and peak stress compared to quasi-static specimens. Microstructure characterization revealed different localized deformation mechanisms in the two types of specimens, with quasi-static specimens showing a wide shear localization region mainly composed of elongated twin structures, while dynamic specimens exhibited an ASB region consisting of ultrafine equiaxed grains resulting from rotational dynamic recrystallization. The study also observed different types of primary twins and multiple generations of twins in both types of specimens. The microhardness of the shear localization region in quasi-static specimens and the ASB region in dynamic specimens were found to be higher due to strain hardening and ultrafine-grained strengthening, respectively. Microtexture analysis revealed different orientation relationships between grains and local shear planes in the two types of specimens.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2022)
Article
Nanoscience & Nanotechnology
Lei Zhang, Xun Chen, Yufeng Huang, Wensheng Liu, Yunzhu Ma
Summary: The study found that under high strain rates, the deformation behavior of 90W-Ni-Fe alloy changes from homogeneous plastic deformation to localized shear deformation, forming adiabatic shear bands (ASBs). Additionally, the microstructure in the ASBs undergoes significant dynamic recrystallization.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2021)
Article
Nanoscience & Nanotechnology
Jingxuan Sun, Lei Zhang, Yufeng Huang, Baishan Chen, Peiyuan Fan, Wensheng Liu, Yunzhu Ma
Summary: This study investigates the use of rotary swaging (RS) as a pretreatment method to improve the penetrating performance of tungsten heavy alloys (WHAs) used in kinetic penetrators. The results show that RS significantly enhances the dynamic penetration strength and adiabatic shear band (ASB) sensitivity of the alloys. It is found that microstructure softening plays a critical role in the initiation of ASB, which is consistent with the rotational dynamic recrystallization (RDR) mechanism.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2022)
Article
Nanoscience & Nanotechnology
Yanfei Yin, Wenjuan Kou, Yongqing Zhao, Haiying Yang, Weidong Zeng
Summary: In this study, a hierarchical transition structure with multiphase architectures, caused by elemental gradients, is obtained in the investigated layered Ti-TiNb alloy. The component types of the alloy are enriched from 2 types to 7 types. Special attention is given to the architectures consisting of alpha-phase in two shapes and nano-sized omega-phase, introduced by heterogeneously precipitating behavior. This study can serve as a template for designing and developing a new class of layered metal materials with multi-component features.
SCRIPTA MATERIALIA
(2022)
Article
Materials Science, Multidisciplinary
Jinqi Pan, Wencong Zhang, Jianlei Yang, Songhui Wang, Xiaoyu Wang, Liqiang Zhan, Wenzhen Chen
Summary: In this study, the microstructural characterization and mechanical behavior of the extruded ZK61 alloy under dynamic and quasi-static loading at 623 K were investigated. It was found that an adiabatic shear band (ASB) composed of ultra-fine grains was formed under dynamic loading, while shear deformation occurred in an area with equiaxed grains under quasi-static loading. The stress-strain curve of dynamic loading showed high yield stress and long working-hardening stage, while the strain-hardening and thermal-softening in quasi-static curves reached a dynamic balance.
MATERIALS CHARACTERIZATION
(2022)
Article
Nanoscience & Nanotechnology
Xiguang Deng, Deliang Zhang, Qingyang Jiao, Songxiao Hui, Wenjun Ye, Lina Zou, Zhisheng Nong
Summary: The Schmid factors of grains in a Ti-2Al alloy were determined and used to investigate the twinning behavior during deformation at different temperatures. It was found that the fraction of twinned grains decreased with increasing deformation temperature. The critical resolved shear stress required to activate twinning was calculated and found to decrease linearly with increasing deformation temperature.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2022)
Article
Engineering, Multidisciplinary
Yi-jiang Xue, Qing-ming Zhang, Dan-yang Liu, Ren-rong Long, Yang-yu Lu, Tian-fei Ren, Liang-fei Gong
Summary: The intensity of impact flash increases with impact velocity, exhibiting a pulse characteristic. Continuous spectrum is observed for collisions at speeds higher than 2 km/s, while only atomic line spectra are detected for collisions at speeds lower than 2 km/s.
DEFENCE TECHNOLOGY
(2021)
Article
Engineering, Mechanical
Yangyu Lu, Qingming Zhang, Yijiang Xue, Xianghua Guo, Cheng Shang, Wenjin Liu, Siyuan Ren, Renrong Long
Summary: Through experiments and numerical simulation, it was found that long-rod projectiles erode and deform into a hemisphere during high-speed penetration of concrete targets. A penetration model was constructed based on the Alekseevskii-Tate model and its applicability was verified through comparison with experimental results.
INTERNATIONAL JOURNAL OF IMPACT ENGINEERING
(2021)
Article
Engineering, Mechanical
Siyuan Ren, Renrong Long, Qingming Zhang, Caibing Chen
Summary: The experiments and numerical simulations conducted in this paper demonstrate that NbC/Al2024 ceramic-metal composites can effectively reduce the damage of debris clouds to the rear wall of Whipple shields, enhancing the protective capability of the shield. The results show that the NbC/Al2024 bumper can reduce the velocity of debris cloud and increase the impact area, thereby reducing the energy density on the rear wall caused by debris cloud impact.
INTERNATIONAL JOURNAL OF IMPACT ENGINEERING
(2021)
Article
Materials Science, Multidisciplinary
Xianzhe Zhong, Qingming Zhang, Fuqing Jiang, Yongming Yan, Zhiwei Wang, Mingze Wu
Summary: The novel Al0.7CoCrFeNiTi0.3 high entropy alloy exhibited excellent combination of high strength and large plasticity, with a unique microstructure composed of alternating nano-scale FCC, BCC, and ordered L2(1) phases. The great mechanical properties of the alloy are attributed to the combination of soft FCC phase and hard BCC/L2(1) phase, as well as the strengthening effect provided by numerous phase interfaces in the nano-scale lamellar microstructure and precipitated ordered phase. The fracture mechanism of the alloy mainly involves compound fracture mode.
Article
Energy & Fuels
Tianfei Ren, Yiran Yan, John H. S. Lee, Hoi Dick Ng, Qingming Zhang, Cheng Shang
Summary: Detonation limits are characterized by a decrease in propagation velocity, changes in cellular structures, and an increase in velocity fluctuation. Approaching the limits is indicated by an increase in average velocity deficit and changes in the detonation mode. Research results suggest that an increase in velocity fluctuation and a sharp increase in average velocity deficit may lead to detonation failure near the limits.
Article
Nanoscience & Nanotechnology
Xianzhe Zhong, Qingming Zhang, Jing Xie, Mingze Wu, Fuqing Jiang, Yongming Yan, Zhiwei Wang
Summary: The mechanical properties and microstructural evolution of the as-cast high-entropy alloy under quasi-static and dynamic compressive loadings were investigated. The alloy exhibited a significant strain rate effect and excellent dynamic compressive properties, with improved strength and ductility through fine microstructural control.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2021)
Article
Engineering, Multidisciplinary
M. Z. Wu, X. W. Zhang, Q. M. Zhang
Summary: Based on the two-arc profile assumption, this study reconsiders the expansion deformation and energy absorption of circular tubes compressed by conical-cylindrical dies. Two improved models are proposed and validated through experiments and simulations. The models successfully capture the deformation features and predict the steady driving force accurately, providing insights into the critical parameters affecting the driving force and energy absorption.
DEFENCE TECHNOLOGY
(2022)
Article
Engineering, Mechanical
Siyuan Ren, Qingming Zhang, Qiang Wu, Renrong Long, Liangfei Gong, Yangyu Lu
Summary: The study presented a PTFE/Al reactive material double-bumper shield for centimeter sized space debris and compared its hypervelocity impact characteristics with an Aluminum alloy double-bumper shield through experiments and numerical simulations. The PTFE/Al reactive material double-bumper shield demonstrated superior protection against projectiles of >=1cm diameter in various velocity ranges, outperforming the Aluminum alloy shield in terms of mass stopping capability and equivalent weight protection. Additionally, the impact resistance of PTFE/Al reactive materials was found to be comparable to Nextel/Kevlar fiber materials.
INTERNATIONAL JOURNAL OF IMPACT ENGINEERING
(2021)
Article
Engineering, Mechanical
Liangfei Gong, Qingming Zhang, Renrong Long, Jie Wang, Wenjin Liu
Summary: Both experimental and theoretical analyses indicate that the combined secondary collision in the oblique and horizontal direction during relatively low-speed hypervelocity impact is the most reasonable explanation for the plasma produced.
INTERNATIONAL JOURNAL OF IMPACT ENGINEERING
(2021)
Article
Engineering, Mechanical
X. W. Zhang, Q. M. Zhang, X. J. Ren
Summary: In this study, the dynamic compression and energy absorption behaviors of porous materials filled with MR fluid were theoretically investigated. The results showed that the two-layer model can predict the dynamic stress before circumferential failure of the specimen very well. The research also found that the energy dissipation due to the MR effect is insensitive to the strain rate, while the energy dissipation caused by viscous flowing and inertial effect increases linearly and quadratically with the increase of impact velocity, respectively.
INTERNATIONAL JOURNAL OF IMPACT ENGINEERING
(2022)
Article
Engineering, Mechanical
Xiaohe Ma, Qingming Zhang, Xiaowei Zhang
Summary: A theoretical model is presented for asymmetric ellipsoidal projectiles suitable for hypersonic vehicles. The model is verified through simulations and provides insights into the ballistic characteristics and the effects of geometric parameters on penetration results.
INTERNATIONAL JOURNAL OF IMPACT ENGINEERING
(2022)
Article
Materials Science, Multidisciplinary
Cheng Shang, Tianfei Ren, Qingming Zhang, Yangyu Lu, Renrong Long, Xianghua Guo, Xin Hu
Summary: This article investigates the dynamic compression performance and damage of W-Zr reactive material on multi-spaced plates through experiments. The results show that W-Zr reactive material has a higher strength limit at high strain rates, leading to large perforation and damaged areas. Compared to inert materials, W-Zr reactive material exhibits stronger damage capability.
MATERIALS & DESIGN
(2022)
Article
Engineering, Aerospace
Siyuan Ren, Qingming Zhang, Fang Gao, Qiang Wu, Haozhe Liang, Wenjin Liu, Xianzhe Zhong, Guangming Song
Summary: With the increasing threat of space debris to spacecraft safety, it is essential to develop new materials for spacecraft shield. This paper investigates the hypervelocity impact resistance mechanism of Whipple shield with reactive material as bumper through experiments and numerical simulations. The results demonstrate that the reactive material bumper can effectively enhance the protective capability of the Whipple shield.
AEROSPACE SCIENCE AND TECHNOLOGY
(2022)
Article
Materials Science, Multidisciplinary
Xianzhe Zhong, Qingming Zhang, Mingzhen Ma, Jing Xie, Mingze Wu, Siyuan Ren, Yongming Yan
Summary: The development of aerospace and military defense sectors has increased the demand for metals with enhanced mechanical properties under extreme conditions. Eutectic high entropy alloys (EHEAs) offer potential applications in these fields due to their excellent mechanical performance and good castability. In this study, the dynamic compressive properties and microstructural characteristics of Al1.19Co2CrFeNi1.81 EHEA were investigated at room temperature and liquid nitrogen temperature. The EHEA exhibited high strength and plasticity, particularly at liquid nitrogen temperature and high strain rate.
MATERIALS & DESIGN
(2022)
Article
Multidisciplinary Sciences
Xin Hu, Qingming Zhang, Zezhong Zhao, Cheng Shang, Xiaoming Rui
Summary: This paper studies the stress characteristics of aluminum strands when tension paying off passes through the pulley. The influence of envelope angle, tension load, and friction on the stress characteristics between aluminum strands is studied using numerical simulation. The results show that the inner aluminum strands are more prone to damage, and friction can reduce the equivalent stress in the cross section.
SCIENTIFIC REPORTS
(2022)
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)
