Article
Nanoscience & Nanotechnology
Yayun He, Ming Gao, Xi Zhao, Xianwei Ren, Yaojin Wu, Yuzhen Cheng, Beibei Dong, Shaobin Bai, Zhimin Zhang, Shengchuan Wu, Shuchang Li
Summary: This paper investigates the fatigue behavior and failure mechanisms of extruded AZ80 magnesium alloy samples with different initial structures. The results indicate that fine grain and precipitates inhibit twinning-twinning behavior to a certain extent, but promote the initiation of fatigue cracks. Studies on fatigue life and fracture mechanism reveal that both residual twins and precipitated phases can cause fatigue crack initiation, but less damage is caused by twin-induced cracks compared to second phase-induced.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2023)
Article
Nanoscience & Nanotechnology
Yoshikazu Nakai, Shoichi Kikuchi, Kaito Asayama, Hayata Yoshida
Summary: The research revealed that twinning occurs under compressive stress, while detwinning only happens under tensile stress. Compression-compression fatigue tests can lead to continuous twinning, changing grain orientation and causing crack formation.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2021)
Article
Materials Science, Multidisciplinary
Haixuan Wang, Wenzhen Chen, Daqing Fang, Wenke Wang, Wencong Zhang
Summary: The compression-extrusion process for basal texture weakening was employed to improve the low-cycle fatigue life of magnesium alloys. Basal texture weakening promoted basal slip, reduced cyclic tension-compression asymmetry, and inhibited cyclic hardening and fatigue crack initiation.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2023)
Article
Metallurgy & Metallurgical Engineering
Wu Gong, Ruixiao Zheng, Stefanus Harjo, Takuro Kawasaki, Kazuya Aizawa, Nobuhiro Tsuji
Summary: The twinning and detwinning behavior of a commercial AZ31 magnesium alloy during cyclic compression-tension deformation was studied using various characterization techniques. The results showed that the volume fraction and number of residual twins increased with the number of cycles, leading to a decrease in the yield strength of compression deformation.
JOURNAL OF MAGNESIUM AND ALLOYS
(2022)
Article
Nanoscience & Nanotechnology
N. B. Zhang, Y. Y. Zhang, S. Chen, B. B. Zhang, Z. L. Li, H. L. Xie, L. Lu, X. H. Yao, S. N. Luo
Summary: This study investigates the onset of detwinning in magnesium alloy Mg-3Al-1Zn under continuous loading using real-time in situ synchrotron X-ray diffraction. The results reveal that detwinning of the {10 (1) over bar2} extension twins occurs immediately upon unloading, regardless of whether the twins are activated by tension parallel to or compression perpendicular to the c-axis fibers.
SCRIPTA MATERIALIA
(2021)
Article
Nanoscience & Nanotechnology
Takayuki Hama, Taiki Nakata, Koichi Higuchi, Hikaru Yoshida, Yuri Jono
Summary: The plastic deformation behavior of a rolled Mg-1.5Zn-0.1Ca alloy sheet with a thickness of 1 mm under different loading conditions is investigated. It is found that under tension, the stress is greater in the rolling direction than in the transverse direction, leading to an apparent plateau region in the latter. Under compression, similar plateau regions are observed in both directions. Under reverse loading, sigmoidal curves appear, more pronounced in the rolling direction. The macroscopic deformation behaviors are attributed to twinning and slip activities.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2023)
Article
Nanoscience & Nanotechnology
Karol Frydrych, Tomasz Libura, Zbigniew Kowalewski, Michal Maj, Katarzyna Kowalczyk-Gajewska
Summary: The paper presents an experimental and numerical study on the deformation mechanisms in the AZ31B magnesium alloy sheet under cyclic in-plane tensile-compressive deformation, focusing on the influence of slip, twinning, and detwinning on mechanical response and texture evolution. A crystal plasticity model accounting for twinning and detwinning is formulated and identified using an evolutionary algorithm, with discussion on the predicted activity of deformation mechanisms in relation to experimental data.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2021)
Article
Metallurgy & Metallurgical Engineering
Weiqin Tang, Jeong Yeon Lee, Huamiao Wang, Dirk Steglich, Dayong Li, Yinghong Peng, Peidong Wu
Summary: The unloading behaviors of the rare-earth magnesium alloy ZE10 sheet were studied using mechanical tests and crystal plasticity modeling. The study found significant anisotropy and loading path dependency in the unloading behaviors of ZE10 sheets. Inelastic strains varied under different loading conditions, with basal slip, twinning, and de-twinning being responsible for the behaviors.
JOURNAL OF MAGNESIUM AND ALLOYS
(2021)
Article
Metallurgy & Metallurgical Engineering
Yu Lei, Ziyi Wang, Guozheng Kang
Summary: The uniaxial cyclic plasticity of cast AZ91 magnesium alloy was investigated, revealing its unique cyclic plasticity and physical nature. The experimental results show tension-compression symmetry and obvious cyclic hardening in the cast AZ91 alloy.
JOURNAL OF MAGNESIUM AND ALLOYS
(2023)
Article
Materials Science, Multidisciplinary
Qichang He, Xiaodan Zhang, Hua Qiao, Huamiao Wang, Peidong Wu
Summary: Experimental observations suggest that pre-deformation can affect the mechanical properties of magnesium alloys, with annealing after pre-deformation leading to enhanced mechanical properties. Pre-compression with about 3% strain and annealing are found to have the greatest impact on the overall mechanical properties of rolled Mg alloy sheets. Different pre-straining paths and loading directions, as well as the presence of annealing, can result in varying effects on the properties of magnesium alloys.
APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING
(2021)
Article
Metallurgy & Metallurgical Engineering
Yuzhi Zhu, Dewen Hou, Qizhen Li
Summary: The twinning and detwinning behavior, as well as slip behavior, were studied in a textured AZ31 magnesium alloy under compressive and tensile strains along the rolling direction. The results showed that twinning initially occurred under compressive strain, while detwinning took place under reversed tensile strain. Slips were also activated to accommodate plastic deformation.
JOURNAL OF MAGNESIUM AND ALLOYS
(2022)
Article
Materials Science, Multidisciplinary
Mohammadhadi Maghsoudi, Henry Ovri, Tobias Krekeler, Markus Ziehmer, Erica T. Lilleodden
Summary: This investigation examined the impact of solutes on the migration of a Gd-decorated twin boundary in a Mg4wt.% Gd binary alloy. The study focused on the stress-strain response and defect structure after (de)twinning, and compared the results to those of pure Mg under the same conditions. The critical stresses for twinning and detwinning increased by 29% and 10% respectively in the presence of Gd, due to the pinning effect of Gd atoms. In contrast, pure Mg experienced a 68% decrease in detwinning stress due to the absence of solute atoms.
Article
Nanoscience & Nanotechnology
Tianjiao Li, Jiang Zheng, Haoge Shou, Rong Shi, Yongfa Zhang, Guilan Wen, Kang Huang, Dongdi Yin, Jinsong Rao
Summary: This study quantitatively and statistically investigated the effects of 3% Y addition on the deformation modes and transferability of Mg sheets during strain-controlled tension-compression low-cycle fatigue at room temperature. The results showed that Mg-3Y alloy exhibited enhanced activity of various slip systems and lower twinning-detwinning activity compared to pure Mg, and it had a higher likelihood of slip transfer.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2022)
Article
Materials Science, Multidisciplinary
Yu Lei, Chao Yu, Ziyi Wang, Xiang Xu, Hang Li, Guozheng Kang
Summary: A multi-mechanism macroscopic phenomenological constitutive model is established to characterize the uniaxial ratchetting of extruded AZ31 magnesium alloy at room temperature. The model considers the strong basal texture and different deformation mechanisms, including dislocation slipping, twinning, and detwinning. Different yield functions and hardening rules are used to capture these different deformation mechanisms, and the interaction among them is considered in the model. The model shows good agreement with experimental results, validating its reasonability and capability.
MECHANICS OF MATERIALS
(2023)
Article
Nanoscience & Nanotechnology
Hossein Fallahi
Summary: This study used quasi in situ EBSD to monitor the texture evolution of extruded magnesium alloy samples under cyclic tensile loading-unloading. The formation of twins was found to be dependent on slip and twin activity in neighboring grains. Slip-trace analysis showed traces on different glide planes, and overlapping EBSD maps revealed the formation of primary and secondary twins. The position and orientation of the twins were calculated, and it was observed that twin interactions with dislocations can lead to damage accumulation.
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)