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
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
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
Nanoscience & Nanotechnology
Tian Liu, Xiaonong Cheng, Hengnan Ding, Leli Chen, Qian Wang, Di Zhang, Rui Luo
Summary: The effect of strain on the microtexture and recrystallization of the GH4169 alloy was investigated using EBSD. The strain gradually increases from the edge to the center of the compressed sample, leading to increased recrystallization. The generation of new sigma 3 boundaries within the DRX grains affects the deformation microstructure, resulting in a decrease in the overall maximum intensity of the microtexture.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2023)
Article
Materials Science, Multidisciplinary
Z. Aalipour, A. Zarei-Hanzaki, A. Moshiri, H. R. Abedi, Daudi Waryoba, A. Kisko, L. P. Karjalainen
Summary: The microstructure and microtexture changes of an extruded and annealed magnesium alloy were investigated under different strain and processing conditions. The results showed that the material underwent noticeable refinement even at low applied compressive strain. Recrystallization process was completed at a true strain of 0.3, and grain refinement was attributed to the LSN and CDRX mechanisms. At higher strain levels, most grains were found in deformed states and the microtexture only changed in terms of intensity.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2022)
Article
Engineering, Mechanical
Kun Jiang, Jianguo Li, Xiukai Kan, Feng Zhao, Bing Hou, Qiuming Wei, Tao Suo
Summary: In this study, the dynamic mechanical behavior of a face-centered cubic (FCC) high/medium entropy alloy (HEA) was investigated through split Hopkinson pressure bar (SHPB) experiments. Electron backscatter diffraction (EBSD) and transmission electron microscopy (TEM) were used to examine the microstructure of the specimens. The results showed that the alloy exhibited strong strain hardening capacity, strain rate sensitivity, and temperature dependence. The compressive failure at 77 K was caused by crack propagation within adiabatic shear bands (ASBs), which were formed due to dynamic recrystallization (DRX) of the material. The severe local shear flow, adiabatic temperature rise, and fast quenching within the ASBs resulted in ultrafine grains.
INTERNATIONAL JOURNAL OF PLASTICITY
(2023)
Article
Materials Science, Multidisciplinary
Haipeng Dong, Fei Guo, Weijiu Huang, Xusheng Yang, Xianghui Zhu, Hu Li, Luyao Jiang
Summary: The study found that rolling under asymmetric conditions can cause distortion of grain structure and significant work hardening, leading to the formation of shear bands and promoting recrystallization process.
MATERIALS CHARACTERIZATION
(2021)
Article
Materials Science, Multidisciplinary
S. M. Fatemi, Y. Moradipour, R. Chulist, H. Paul
Summary: Shear punch deformation was used to investigate the shear deformation behavior and microstructural evolution of a Mg-Y-Nd-Zr alloy at various temperatures. It was found that metastable phases may precipitate dynamically during deformation, and flow softening behavior was observed at different temperatures. The deformation mode promoted extension twinning, and twinning was observed even at high temperatures. Dynamic recrystallization occurred at 450 and 500 degrees C, with progressive lattice rotation as the mechanism. Shear flow stress was successfully modeled using constitutive equations. The rate-controlling mechanisms were determined to be dislocation glide controlled by rare earth diffusion at 25-400 degrees C and grain boundary sliding controlled by lattice diffusion at 450-500 degrees C.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2022)
Article
Materials Science, Multidisciplinary
Supriyo Chakraborty, Chaitali S. Patil, Stephen R. Niezgoda
Summary: Medium to high stacking-fault energy FCC metals exhibit a strong tendency to develop a cube texture during static recrystallization. The mechanisms behind the development of cube orientation in non-cube grains under plane strain compression are still unknown.
Article
Materials Science, Characterization & Testing
Dongxiao Wang, Baosen Lin, Yi Jing, Qiangqiang Zhu, Jianping Li, R. Devesh K. Misra
Summary: In this study, two AZ91 samples were compressed at 200 degrees C and 350 degrees C, respectively, to investigate their micro-structure and their effect on deformation. The results show that at low temperature, the deformation mechanism is slipping, twinning, and shear banding due to the low compression temperature. The increase of adiabatic temperature leads to an increase in stacking fault energy of the alloy, causing dislocations to gather at the shear band and resulting in increased hardness, which hinders deformation. At high temperature, a large number of fine second phases precipitate at the shear bands, providing nucleation sites for recrystallization and energy storage for dislocations, which leads to recrystallization nucleation and growth at the shear bands. Discontinuous dynamic recrystallization weakens texture intensity.
Article
Nanoscience & Nanotechnology
Xian-Yu Li, Zhao-Hui Zhang, Xing-Wang Cheng, Qiang Wang, Xiao-Tong Jia, Dan Wang, Xin-Fu Wang
Summary: The microstructural evolution and formation mechanism of adiabatic shear band (ASB) in M54 steel were studied using split Hopkinson pressure bar (SHPB). The strain response to ASB was analyzed by strain controlling dynamic compression tests at high strain-rates. The results showed that ASBs started to form at 23% strain and shearing failure strain increased to 28% at a strain-rate of 4000 s(-1).
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2022)
Article
Chemistry, Physical
Julian Escobar, Bharat Gwalani, Matthew Olszta, Joshua Silverstein, Tanvi Ajantiwalay, Nicole Overman, Wenkai Fu, Yulan Li, Luciano Bergmann, Emad Maawad, Benjamin Klusemann, Jorge F. dos Santos, Arun Devaraj
Summary: During friction stir processing of metals, there is an interplay between high shear deformation and deformation-induced heating, leading to complex spatially heterogenous activation of dynamic recrystallization and twinning mechanisms. This study combines multimodal microstructural characterization, solution thermodynamics-based predictions, and computational crystal plasticity simulation to reveal the microstructural evolution mechanisms in a Cu-4at%Nb binary model alloy during FSP.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Green & Sustainable Science & Technology
Yi Xia, Chunmei Mu, Wenjie Li, Kai Ye, Haojie Wu
Summary: In this study, a combination of photogrammetry and computer technology is used in the unconsolidated undrained test of triaxial soil samples to avoid the influence of end restraint on stress and strain measurements. The novel method allows for the establishment of an intuitive shear band evolution model and accurate observation of the shear change process of the soil sample.
Article
Materials Science, Multidisciplinary
Jinqi Pan, Jianlei Yang, Wencong Zhang, Huan Li, Wenzhen Chen, Guorong Cui
Summary: In this study, hot shear-compression deformation of in situ TiBw/Ti6Al4V composites was conducted, revealing shear as the dominant deformation mechanism and observing dynamic recrystallization in shear bands, leading to a decrease in flow stress. The presence of TiBw promoted the process of dynamic recrystallization.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2021)
Article
Materials Science, Multidisciplinary
Yunteng Wang, Ronaldo I. Borja, Wei Wu
Summary: We propose a new phase-field formulation to model the formation and propagation of compaction bands in high-porosity rocks. This formulation takes into account the effects of inertia on the rate of development of compaction bands, as well as degradation mechanisms in tension, compression, and shear. We also present a robust numerical technique to handle the spatiotemporal formation and evolution of the compaction band, and validate the model using a benchmark problem involving a notched cylindrical specimen of Bentheim sandstone.
JOURNAL OF THE MECHANICS AND PHYSICS OF SOLIDS
(2023)
Article
Materials Science, Multidisciplinary
Tao Zhou, Jie Dai, Zhu Xiao, Wen-Ting Qiu, Qian Lei, Xinwei Liu, Liuxin Qin, Muzhi Ma
Summary: The Cu2O-Gr composites prepared by short-process reduction and vacuum hot pressing exhibit higher density and strength, as well as lower friction coefficients and wear rates compared to Cu-Gr composites prepared by conventional hot pressing. The study shows that the modification of graphite morphology and enhancement of interface bonding contribute to the improved mechanical performance of the composites.
Article
Chemistry, Physical
Zhu Xiao, Weiyang Wang, Qian Lei, Biaobiao Yang, Meng Wang, Yihai Yang, Daren Zhou, Zhou Li
Summary: The microstructural evolution and property variations of CuCrZrY alloy processed by ECAP were systematically studied. After multiple passes of ECAP, the average grain size decreased significantly, leading to improved mechanical properties and electrical conductivity. The main strengthening mechanisms include precipitation strengthening, low-angle grain boundary strengthening, and high-angle grain boundary strengthening. The inconsistency of strain force between outer and inner regions may result in the inhomogeneity of microstructure.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Nanoscience & Nanotechnology
Jie Dai, Muzhi Ma, Zhu Xiao, Xiangpeng Meng, Gai Sun, Tianyi Zhang, Tao Zhou, Linhan Li, Yuxiang Zhu
Summary: This study shows that adding a small amount of Si in Cu-0.26Cr-0.14Mg alloy greatly improves its strength and electrical conductivity. Si promotes the precipitation of alloying elements, refines the microstructure, and enhances the effects of dislocation strengthening and Orowan-Ashby strengthening.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2022)
Article
Nanoscience & Nanotechnology
Yongjie Pang, Guohui Chao, Tianyang Luan, Shen Gong, Yongru Wang, Zhaohan Jiang, Zhu Xiao, Yanbin Jiang, Zhou Li
Summary: This paper systematically studied the effect of Si on the microstructure and properties of Cu-10Fe alloy. By adding 0.4 wt% Si, significant improvements were observed in mechanical properties, electric conductivity, thermal conductivity, saturation magnetization, and electromagnetic interference shielding effectiveness. The Cu-Fe-Si alloy with high-strength, high-conductivity, and magnetic properties has great application potential in electromagnetic shielding and other fields.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2021)
Article
Materials Science, Multidisciplinary
Guoai He, Cunxiao He, Yu Liu, Chao Liu, Zhiqiang Fu, Shuanghui Xu, Xiaofei Sheng, Zhu Xiao, Qinghong Wen
Summary: This study applied spray deposition to manufacture AlZnMgCu alloy and used high-resolution EBSD to investigate the microstructure during thermal compression under different temperatures and strain rates. The results revealed the occurrence of partial discontinuous dynamic recrystallization at low temperatures and high strain rates, while continuous dynamic recrystallization was observed at higher temperatures and lower strain rates.
METALS AND MATERIALS INTERNATIONAL
(2022)
Article
Chemistry, Physical
Xi Zhang, Zhu Xiao, Ziqi Xia, Shuo Han, Xiangpeng Meng, Yuyuan Zhao, Zhou Li, Qian Lei
Summary: Cu-TiNi composites with different TiNi volume percentages were prepared, and their microstructure, thermal and mechanical properties were analyzed. The results showed that diffusion of elements occurred at the interface and formed a diffusion layer. TiNi particles were uniformly distributed in the Cu matrix and had a well-bonded interface. The hardness and yield strength increased with the increase of TiNi volume percentage, while the thermal expansion coefficient showed an opposite trend.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Materials Science, Multidisciplinary
Muzhi Ma, Zhu Xiao, Xiangpeng Meng, Zhou Li, Shen Gong, Jie Dai, Hongyun Jiang, Yanbin Jiang, Qian Lei, Haigen Wei
Summary: Cu-Cr-Ca and Cu-Cr-Sr alloys fabricated by thermo-mechanical treatment showed improved mechanical and electrical properties compared to Cu-Cr alloy. The softening resistance of the alloys was significantly enhanced by the addition of Ca and Sr elements. The high strength of the alloys was mainly attributed to dislocation strengthening and precipitate strengthening.
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
(2022)
Article
Nanoscience & Nanotechnology
Kerui Song, Zhou Li, Mei Fang, Zhu Xiao, Yuntian Zhu, Qian Lei
Summary: The evolution of microstructures and properties of hot rolled cobalt during isothermal annealing at different temperatures was studied. It was found that recrystallization only occurred in hexagonal closed-packed (HCP) cobalt below the martensitic transformation temperature, while the proportion of face-centered cubic (FCC) cobalt decreased significantly. With increasing annealing time, the cobalt sample transformed into a single-phase HCP-Co due to the diffusion phase transformation promoted by high angle boundaries (HABs). Recrystallization occurred in both HCP-Co and FCC-Co for samples annealed at 400 degrees C, with the proportion of FCC-Co reaching its highest value of 50% at 4 hours of annealing. Special boundaries, annealing twins, and the alternate permutation of nano FCC-Co lamellae and HCP-Co lamellae contributed to an average grain size of less than 2.5 μm even after 12 hours of annealing. The recrystallization mechanism was analyzed using the Johnson-Mehl-Avrami-Kolmogorov model and modified Arrhenius relationship. The nucleation and grain growth through the migration of HABs promoted the FCC -> HCP diffusive phase transformation below the martensitic transformation temperature. On the other hand, recrystallization kinetics of HCP-Co and migration of HABs were hindered by reverse martensitic transformation at temperatures above the martensitic transformation temperature.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2022)
Article
Materials Science, Multidisciplinary
Yihai Yang, Qian Lei, Huan Liu, Jianda Hong, Zhen Han, Qi An, Jimin Shan, Xi Chen, Haoran Xu, Zhu Xiao, Shen Gong
Summary: This study characterized the second phase particles in Cu-Cr-Nb alloys and uncovered their crystal structure, precipitation, phase transformation behavior, and orientation relationship. The findings are significant for developing high-performance Cu-Cr-Nb alloys.
MATERIALS & DESIGN
(2022)
Article
Nanoscience & Nanotechnology
Muzhi Ma, Zhou Li, Zhu Xiao, Yanlin Jia, Xiangpeng Meng, Yanbin Jiang, Yue Hu
Summary: This paper investigates the microstructure and properties of a series of Cu-based alloys fabricated through multi-step thermo-mechanical treatment (TMT). The results show that these alloys exhibit a combination of high strengths and high conductivity. The study also reveals the influence of alloy composition on the properties.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2022)
Article
Materials Science, Multidisciplinary
Yuntian Zhu, Zhu Xiao, Zhou Li, Kerui Song, Qian Lei, Yu Chen
Summary: Polycrystalline tantalum sheets were deformed using different rolling methods, resulting in changes in recrystallization and grain size. Cryogenic-rolled samples showed easier recrystallization and larger grain size after annealing. Additionally, the fraction of alpha-texture in APR-ed samples decreased significantly with increasing annealing time.
Article
Materials Science, Multidisciplinary
Meng Wang, Qianru Yang, Yanbin Jiang, Liuxin Qin, Fei Tan, Zhao Xin, Zhu Xiao
Summary: A Cu-9Ni-6Sn alloy bar with axial columnar grains was prepared by directional solidification. The effects of aging on the microstructure and mechanical properties of the alloy were studied. The results showed that aging treatment significantly increased the tensile strength but decreased the elongation of the alloy.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2022)
Article
Chemistry, Physical
Weiyang Wang, Shuang Zhou, Zhu Xiao, Wenting Qiu, Qian Lei
Summary: This study investigated the microstructure evolution and properties of a CuCrZrSc alloy undergoing aging treatment and equal channel angular pressing (ECAP). The results showed that pre-aging treatment significantly improved the mechanical properties and electrical conductivity of the alloy. After 12 passes of deformation and aging treatment, the alloy exhibited enhanced mechanical properties.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Chemistry, Physical
Xu Wang, Zhu Xiao, Xiang-peng Meng, Yu-hang Yi, Lei Chen
Summary: A Cu-based alloy was deformed by equal channel angular pressing (ECAP) at different temperatures, and the evolution of its microstructure and mechanical properties was studied. The cryogenic-deformed samples exhibited slightly higher hardness compared to the room-temperature-deformed samples, but their yield strengths were similar after multiple ECAP passes. ECAP deformation significantly refined the grain size of the alloy through dislocation subdivision and twin fragmentation.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Nanoscience & Nanotechnology
Xiangyu Yu, Yilin Zhang, Yaxuan Zhang, Shen Gong, Haotian Sun, Jianxi Wen, Zhu Xiao, Yanbin Jiang, Zhou Li
Summary: A new dual-scale FeCrSi ternary second-phase alloy has been developed, with the addition of Cr and Si promoting the morphology transformation of the submicron Fe phase and improving the electrical conductivity and mechanical properties of the alloy.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(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)