Article
Materials Science, Multidisciplinary
Jing Xu, Bo Guan, Xiaojun Zhao, Rui Fu, Qiang Hu, Chaoqiang Liu
Summary: This study investigates the impact of strain rate on the twinning process and mechanical behavior during compression of a rolled AZ31 Mg plate. The results show that the yield strength is insensitive to strain rates below 0.05 s-1, but increases at a higher strain rate of 2500 s-1. Interestingly, the TD-compressed sample exhibits a larger yield plateau at a strain rate of 2500 s-1 due to increased activation of {101 over bar 2} twins. The twinning process is highly dependent on the strain rate, with higher strain rates promoting twin nucleation and leading to a higher twin boundary density.
Article
Engineering, Mechanical
Hang Li, Chao Yu, Guozheng Kang
Summary: The non-proportional multiaxial ratchetting behavior of extruded AZ31 Mg alloy was investigated through macroscopic experimental observations and corresponding microscopic investigations. A constitutive model was developed to capture the plastic deformation mechanisms and the evolution of back stresses during the ratchetting process. The developed model successfully reproduced the non-proportional multiaxial ratchetting behavior of the AZ31 Mg alloy.
INTERNATIONAL JOURNAL OF PLASTICITY
(2022)
Article
Materials Science, Multidisciplinary
Lin Zhang, Zanyang Zhang, Lele Huang, Lihong Wu, Yufeng Sun, Shaokang Guan
Summary: Friction stir welded AZ31 Mg alloy joints were prepared at two different rotation speeds, 150 rpm and 500 rpm, and labeled as FSW-150 and FSW-500, respectively. The microstructure of the joints was characterized, and the strain evolution in the tensile tests was monitored. The results showed that the FSW-150 and FSW-500 joints had different grain structures and thermal-mechanical textures. The shape of the stir zone also varied, resulting in different strain distributions and fracture behavior. Additionally, the FSW-500 joints exhibited improved tensile strength and elongation compared to the FSW-150 joints.
Article
Materials Science, Multidisciplinary
Sachiko Hiromoto, Kotaro Doi
Summary: The effect of polyethylene glycol (PEG) modification on the corrosion behavior under tensile deformation of hydroxyapatite-coated Mg-3mass% Al-1mass% Zn (HAp-AZ31) was investigated. PEG-modified HAp-AZ31 exhibited 1.4 times longer elongation to failure in slow strain rate tensile (SSRT) tests. The PEG modification had little effect on cracking of HAp coating in rapid straining electrode (RSE) tests, but reduced corrosion propagation from the cracks by half.
Article
Materials Science, Multidisciplinary
Lei Kang, Weirong Liu, Xiongbo Zhang, Leng Chen
Summary: The study investigates the microstructure, texture, and residual stress of AZ31 Mg alloy at different extrusion temperatures and speeds. The results show a bimodal microstructure with fine grains in the dynamic recrystallization zone and coarse grains in the non-dynamic recrystallization zone. The relationship between average grain diameter and extrusion speed is non-monotonic, attributed to promoted nucleation and inhibited grain growth. The bimodal microstructure maintains the stability of sharp {0002} basal texture.
MATERIALS RESEARCH EXPRESS
(2021)
Article
Materials Science, Multidisciplinary
Peng Peng, Daliang Yu, Xiaomeng Guo, Peng Zhang, Sensen Chai, Qingwei Dai, Jian Lu
Summary: The implementation of asymmetric deformation has been proven to be an effective method for optimizing the basal texture of wrought Mg alloys, resulting in improved plasticity and formability. This study conducted differential temperature rolling (DTR) on AZ31 Mg alloy to achieve asymmetric deformation. The results showed that the ductility and formability of the RT-200 sample were comparable to those of the traditional cold rolling and annealing combination process, and further improvement was achieved by combining with annealing treatment (AT).
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2023)
Article
Nanoscience & Nanotechnology
Junlei Zhang, Yu Huang, Jin Xiang, Guangsheng Huang, Xiang Chen, Hu Zhou, Bin Jiang, Aitao Tang, Fusheng Pan
Summary: The dissimilar AM60/AZ31 Mg alloys joints were obtained via friction stir welding (FSW) and then remelted using tungsten inert gas (TIG) welding. After arc heating, the joint elongation significantly improved due to the increase of grain size, weakening of texture, and annihilation of initial residual dislocations. This work provides a new method for weakening the strain localization of FSW Mg joints.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2021)
Article
Chemistry, Multidisciplinary
Qianhua Yang, Bowen Yang, Zhibing Chu, Chun Xue, Yugui Li, Leifeng Tuo, Hong Gao
Summary: In this article, the compression behavior of AZ31 magnesium alloy is simulated using the molecular dynamics method. The effects of loading mode, temperature, and strain rate on the compression behavior are analyzed, and the structural evolution and dislocation evolution in the compression process are deeply analyzed.
NANOTECHNOLOGY REVIEWS
(2022)
Article
Nanoscience & Nanotechnology
Zijian Wang, Hanlin Ding, Zhendong Xiao, Chenxi Yang, Chongchen Xiang
Summary: The Mg-0.8Al-0.1Ca-0.4Mn alloy exhibited extraordinary extrudability and superior mechanical properties at high strain rates, attributed to the simultaneous activation of multiple slip systems and the work hardening caused by a large number of dislocations packed and entangled at grain boundaries.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2021)
Article
Materials Science, Multidisciplinary
Xin Chen, Chuming Liu, Shunong Jiang, Yingchun Wan
Summary: Remarkable grain refinement of AZ31 Mg alloy was achieved by low-strain rotary swaging, with nanograins formed in the central region attributed to high strain rates and constantly changing loading directions. The nanocrystallization process in the central region was dominated by tension twinning and the formation of dislocation arrays, while only twins were formed in the edge region due to a single loading direction towards the center.
Article
Materials Science, Multidisciplinary
S. M. Fatemi, H. Paul, A. Hemmati-Hosuri
Summary: An ultrafine-grained AZ31 Mg alloy processed through multipass equal channel angular pressing (ECAP) achieved mean grain sizes of 5 and 0.9 μm after two and four passes, respectively. Tensile testing at high temperatures revealed that the four-pass-processed alloy exhibited a superplastic elongation of 410% at 250 degrees C. The deformation behavior was studied using the Haehner criterion, showing that grain boundary sliding was the rate-controlling mechanism with a strain rate sensitivity of 0.38. The contribution of slip system to superplasticity was discussed using Schmid factors, which showed that slip activity prevalence at high strains induced texture-strengthening effect and low-angle grain boundary formation.
MATERIALS SCIENCE AND TECHNOLOGY
(2023)
Article
Materials Science, Multidisciplinary
Yaocheng Zhang, Li Yang, Lianbei Sun, Yingying Zhang, Song Pang, Tao Meng
Summary: The microstructure of spray deposited and extruded Al-Zn-Mg-Cu alloy after regression re-aging treatment was investigated. The main precipitate phases were short rod-shaped eta', coarse rod-shaped h and G.P. zones. The mechanical properties were influenced by strain rate and sample thickness, which determined the yield and ultimate tensile strength of the alloys. The alloy exhibited mixed-mode fracture and strain hardening was conducted by deformation texture.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2022)
Article
Materials Science, Multidisciplinary
C. Ha, J. Bohlen, X. Zhou, H-G Brokmeier, K. U. Kainer, N. Schell, D. Letzig, S. Yi
Summary: This study investigated the differences in texture development and active deformation mechanisms during sheet rolling for binary Mg-RE or Mg-Ca alloys compared to their ternary counterparts with Zn. The analyses were based on in-situ synchrotron experiments and electron backscatter diffraction measurements, revealing direct experimental evidence of texture development and active deformation mechanisms. Higher activations of nonbasal a c+a 1010 a a c+a a slip in the Zn-containing ternary alloys were confirmed through EBSD misorientation analysis.
MATERIALS CHARACTERIZATION
(2021)
Article
Crystallography
Xiaoyan Fang, Chen Zhou, Jinbao Lin, Wenwen Li
Summary: The deformation mechanism and texture evolution of AZ31 Mg alloy compressed in three different directions were investigated. It was found that the deformation mode played a dominant role in determining the texture evolution by varying the critical resolved shear stress (CRSS) ratio. Basal slip and prismatic slip were the main mechanisms for deflection of grains, while pyramidal slip and {10-12} extension twin led to significant grain deflection. The activation of {10-11} compression twin resulted in different grain deflection patterns depending on the compression direction.
Article
Materials Science, Multidisciplinary
Santanu Mandal, Satyabrata Nigamananda Sahoo, Vamsi K. Balla, Mitun Das, Mangal Roy
Summary: This study focuses on enhancing the antibacterial properties, mechanical properties, and corrosion resistance of Mg-5Zn-0.5Zr-0.7Cu alloy through alloying and thermomechanical processing. The results showed that forging led to significant grain refinement and texture strengthening, resulting in a 1.2 times increase in strength and a 2.3 times reduction in in vitro degradation rate. Both alloys demonstrated complete inhibition of E.Coli bacteria within 32 hours of culture, attributed to the addition of Cu. The non-toxic nature of the alloys was confirmed through cell viability studies, suggesting the potential use of Mg-5Zn-0.5Zr-0.7Cu alloy as internal fracture-fixation material.
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)