Article
Materials Science, Multidisciplinary
Zhiyu Chang, Yujuan Wu, Ning Su, Qingchen Deng, Qianye Wu, Yanting Xue, Liming Peng, Wenjiang Ding
Summary: By using the strain-induced melt activation (SIMA) route, semisolid billets of Mg-10Gd-3Y-1Zn-0.4Zr (wt%) alloy were prepared, and the effects of isothermal heating parameters on the morphology and coarsening kinetics of primary solid grains were studied. The study found that the grain size increased with isothermal time, and the coarsening rate constant increased with isothermal temperature within a certain range.
MATERIALS CHARACTERIZATION
(2021)
Article
Engineering, Manufacturing
Qingchen Deng, Yujuan Wu, Qianye Wu, Yanting Xue, Yu Zhang, Liming Peng, Wenjiang Ding
Summary: A high-strength Mg alloy was prepared using laser powder bed fusion, and the microstructure and mechanical properties were studied in different states. The alloy exhibited improved strength and ductility after solution heat treatment and aging treatment.
ADDITIVE MANUFACTURING
(2022)
Article
Materials Science, Multidisciplinary
Huabing Liu, Xiaoxiao Wei, Shilong Xing, Lianbo Wang, Wenlong Zhu, Chuanhai Jiang, Vincent Ji, Ke Zhan
Summary: The study found that stress shot peening has a more significant improvement on the surface layer characteristics of the nanostructured Mg-8Gd-3Y alloy, resulting in finer microstructures and higher residual stresses.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2021)
Article
Nanoscience & Nanotechnology
H. Miura, P. L. Khoo, M. Kobayashi
Summary: This study utilized extremely high-pressure forging conditions to refine the grain and improve the mechanical properties of magnesium AZ80 alloy by forming mechanical twins and texture strengthening. The hardness, yield strength, and ultimate tensile strength of the material were notably enhanced with increasing forging stress.
SCRIPTA MATERIALIA
(2023)
Article
Nanoscience & Nanotechnology
Peng Peng, Xiantao Yan, Wanchao Zheng, Yuanli Xu, Xudong Zhang, Zhikun Ma, Hong Zhang
Summary: This study investigates the microstructure evolution and mechanical properties of Mg-6.2Li-3.5Al-3Y alloy after different heat treatment processes. The results show that the tensile strength and ductility of the alloy increase first and then decrease with increasing heat treatment time. It is concluded that the improved mechanical properties are attributed to the combined effects of precipitation hardening and solid solution strengthening.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2022)
Article
Nanoscience & Nanotechnology
Nan Wang, Qiang Yang, Xinlin Li, Kai Guan, Jingqi Zhang, Caogen Yao, Xuhu Zhang, Jian Meng, Xin Qiu
Summary: The microstructural evolution and mechanical properties of a Y-rich misch metal modified Mg-9Gd-3Y-0.6Zn-0.4Zr alloy were studied, revealing that the as-extruded and peak-aged alloys exhibit excellent yield strength at room temperature and 250 degrees C, with grain boundary strengthening and precipitation strengthening identified as the dominant mechanisms.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2021)
Article
Materials Science, Multidisciplinary
Huabing Liu, Bo Yang, Jinhan Zhang, Jin Gan, Weiguo Wu, Chengxi Wang, Chuanhai Jiang
Summary: Shot peening treatment is commonly used to enhance the mechanical properties of components. This study used an in-situ X-ray diffraction test technique combined with a micro-tensile tester to determine the mechanical properties of the shot-peened alloy. The results showed the development of a gradient-strengthened layer and the relaxation rule of the surface compressive residual stress under cyclic loading.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2023)
Article
Chemistry, Applied
Zhongtao Jiang, Xiang Meng, Bin Jiang, Shan Jiang, Jiahong Dai, Jingren Dong, Yongfeng Ding
Summary: This study confirmed the effectiveness of Mg-10Al2Y master alloy as a grain refiner for Mg-3Y alloy, with optimum performance observed at 2 wt% addition. The addition of Al2Y particles resulted in significant enhancement in both strength and elongation of the alloy.
JOURNAL OF RARE EARTHS
(2021)
Article
Materials Science, Coatings & Films
Huabing Liu, Jin Gan, Chuanhai Jiang, Weiguo Wu, Mario Guagliano
Summary: A two-step severe shot peening method was used to fabricate nanostructured Mg alloys and investigate the softening mechanism. The results showed that nanocrystalline was formed mainly through continuous dynamic recrystallization. Softening occurred near the surface layer due to partial discontinuous dynamic recrystallization during two-step SSP treatment.
SURFACE & COATINGS TECHNOLOGY
(2022)
Article
Nanoscience & Nanotechnology
Dongdong Zhang, Shuo Yang, Fanzhi Meng, Zheng Tian, Hong Xu, Zhanyi Cao, Jian Meng
Summary: A high-strength Mg alloy with bimodal microstructure was creep tested under various conditions, revealing two stages of steady-state and transient primary creep and proposing reasons for abnormal decrease in creep rate. The alloy showed high stress exponents and activation energies, with dominant creep mechanism being cross-slip of dislocations. Furthermore, phase transformation in hot-worked regions affected creep behavior, with coexistence of different phases playing a role.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2021)
Article
Materials Science, Multidisciplinary
Zhiyu Chang, Qiao Lan, Yujuan Wu, Ning Su, Qingchen Deng, Chenyang Ding, Tateoki Iizuka, Liming Peng, Wenjiang Ding
Summary: In this study, the interfacial reaction and microstructure of a Mg-RE alloy matrix composite reinforced with aluminum borate whisker were investigated through heat treatment. The thickness and composition of the interface layer changed with increasing heating time, revealing the influence of Mg atom concentration gradient and reaction product hindrance on the interfacial reaction.
MATERIALS CHARACTERIZATION
(2022)
Article
Chemistry, Physical
Siqi Liu, Han Ma, Zhenghua Huang, Zhongming Zhang, Chunjie Xu, Xiao Li, Feng Chen, Zhiqiao Yan, Fengyu Kong, Anding Wang, Zhixiang Liu
Summary: The Mg-8Gd-4Y-1Zn-0.5Al alloy prepared by metal type casting was subjected to rolling or extrusion-rolling to obtain sheets, followed by aging treatment. The microstructures and mechanical properties of the sheets were analyzed. The optimal process was determined to be rolling at 793 K with a deformation of 70%, resulting in a sheet with fully dynamic recrystallized grains and strong basal texture. After aging treatment, the sheet exhibited good mechanical properties. The extruded sheets showed grain growth and texture change after rolling at 793 K with a 50% deformation. The 18R-LPSO structures in the sheets affected the mechanical properties. Anisotropy was observed in the mechanical properties of the extrusion-rolled sheet.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Metallurgy & Metallurgical Engineering
Hai Gong, Yong-biao He, Tao Zhang, Kang Chen, Yun-xin Wu, Xu-liang Zhang, Xiao-long Liu
Summary: In this study, the flow behavior of Mg-10Gd-3Y-0.4Zr magnesium alloy during high-temperature deformation was investigated through thermal compression experiments. The results showed that the flow stress decreased with increasing temperature and decreasing strain rate. An improved Arrhenius constitutive equation considering strain compensation was established to describe the variation of rheological stress. However, the model showed deviation in the true stress-strain curves at low temperature and high strain rate. Therefore, a modified Arrhenius-type constitutive model was established that accurately predicted the rheological stress of the magnesium alloy under all conditions during high-temperature compression.
JOURNAL OF CENTRAL SOUTH UNIVERSITY
(2023)
Article
Metallurgy & Metallurgical Engineering
Lixiang Yang, Yuanding Huang, Zhengquan Hou, Lv Xiao, Yuling Xu, Xiwang Dong, Fei Li, Gerrit Kurz, Baode Sun, Zhongquan Li, Norbert Hort
Summary: A Mg-3Y-2Gd-1Nd-0.4Zr alloy with low rare earth content was developed and prepared by sand casting with a differential pressure casting system. The aged alloy exhibited excellent comprehensive mechanical properties due to the formation of fine dense plate-shaped beta' precipitates during aging. This new developed alloy showed better properties compared to commercial WE43 alloy for fabricating large complex thin-walled components.
JOURNAL OF MAGNESIUM AND ALLOYS
(2023)
Article
Chemistry, Physical
Fangyong Niu, Qiyong Wang, Boyang Shan, Xiong Sun, Guangyi Ma, Dongjiang Wu
Summary: This paper proposes a synchronous-hammer-forging-assisted WAAM technology and systematically studies its effects on the macroscopic morphology, microstructure, pores evolution, and mechanical properties of WAAM Al-Mg alloy specimens. The results show that under the synchronous hammer-forging condition, a large plastic deformation of 33.97% can be achieved, and the surface flatness of the specimen is significantly improved. Furthermore, the use of synchronous hammer-forging technology and increased hammer-forging force breaks the precipitated phase dominated by Al3Mg2 and reduces the number and size of pores, resulting in higher yield and tensile strength.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
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)