Article
Nanoscience & Nanotechnology
Shuxia Ouyang, Guangyu Yang, Cheng Chen, Tong Bai, He Qin, Chunhui Wang, Lei Zhang, Wanqi Jie
Summary: The addition of Zn in Mg-rare earth alloys has different effects on the microstructures and creep properties. At low temperatures, Mg-15Gd alloy exhibits better creep resistance, while at high temperatures, Mg-15Gd-1Zn alloy has better creep resistance.
SCRIPTA MATERIALIA
(2022)
Article
Materials Science, Multidisciplinary
R. E. Schaublin, M. Becker, M. Cihova, S. S. A. Gerstl, D. Deiana, C. Hebert, S. Pogatscher, P. J. Uggowitzer, J. F. Loffler
Summary: The impact of Zn and Ca on the microstructure of lean Mg-Zn-Ca alloys was investigated. The precipitation of binary and ternary precipitates was observed at different temperatures. Hardness testing revealed that GP zones were the most effective factor in hardening.
Article
Nanoscience & Nanotechnology
Zhi Zhang, Jinghuai Zhang, Jinshu Xie, Shujuan Liu, Yuying He, Ru Wang, Daqing Fang, Wei Fu, Yunlei Jiao, Ruizhi Wu
Summary: The addition of trace Sm can significantly increase the grain boundary segregation concentration in the dilute Mg-Zn-Ca-Mn alloy, improve its yield strength, inhibit grain growth during annealing, and contribute to the design of advanced Mg alloys.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2022)
Article
Materials Science, Multidisciplinary
Z. H. Li, D. Cheng, K. Wang, E. R. Hoglund, J. M. Howe, B. C. Zhouc, T. T. Sasaki, T. Ohkubo, K. Hono
Summary: This study investigated the precipitation process of a Mg-0.3Ca-0.6Zn alloy during isothermal aging at 200 degrees C using advanced microscopy techniques and first-principles calculations. The results revealed the formation of monolayer G.P. zones, which transformed into tri-atomic layer η'' and η' plates. The η' plates then formed pairs and stacks with pure magnesium layers. The unique structure of coarse η1 plates led to a different precipitate microstructure evolution from other Mg-RE-Zn alloys. First-principles calculations confirmed the crystal structure and stability of the precipitates, supporting a new precipitation sequence.
Article
Chemistry, Physical
Hyo-Sun Jang, Donghyuk Seol, Byeong-Joo Lee
Summary: This study investigates the effect of alloying elements on the recrystallization behavior of magnesium alloys. It is found that grain boundary segregation and solute clustering in solid solutions can affect grain boundary migration, leading to changes in recrystallization behavior. Solute clusters in Mg-Zn-Ca alloys have a stronger dragging effect on grain boundaries compared to Mg-Al-Zn alloys, providing another explanation for the changes in recrystallization behavior.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Nanoscience & Nanotechnology
Z. H. Li, T. T. Sasaki, A. Uedono, K. Hono
Summary: This study investigates the role of Zn in the rapid age-hardening process of magnesium alloys. The results show that the addition of Zn facilitates the formation of Ca-Zn co-clusters, which contributes to the rapid age-hardening.
SCRIPTA MATERIALIA
(2022)
Article
Materials Science, Multidisciplinary
Deping Zhang, Boqiong Li, Jinhui Zhang, Ting Niu, Chunlin Li, Peng Cheng, Liuqing Yang
Summary: This study investigates the influence of RE content on the mechanical properties, creep resistance, and microstructures of a die-cast Mg alloy. The results show that minor content of RE elements can increase both the strength and ductility of the alloy. RE addition refines the microstructure and forms stable phases, leading to improved mechanical properties. In addition, RE addition also enhances the creep resistance of the alloy by preventing grain boundary sliding and suppressing dynamic precipitation of phases.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2023)
Article
Nanoscience & Nanotechnology
Deping Zhang, Boqiong Li, Dongdong Zhang, Chaojie Che, Baosheng Liu, Chunlin Li, Ting Niu, Xiaoyuan Gong, Chao Du, Liren Cheng
Summary: The addition of a minor amount of Nd to the Mg-4Sm-0.6Zn-0.4Zr alloy improves its creep resistance, reducing the minimum creep rate by nearly one order of magnitude compared to the Nd-free alloy. Additionally, the high-temperature tensile strength is improved by over 30 MPa. Nd modification results in the simultaneous precipitation of basal and prismatic precipitates, which create a closed volume and effectively block dislocation motions, leading to enhanced creep resistance. The atomic misfit of Nd with Mg and its lower diffusivity compared to Sm further contribute to the creep resistance of the Nd-modified alloy.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2023)
Article
Materials Science, Multidisciplinary
Junliu Ye, Xianhua Chen, Zhu Luo, Jianbo Li, Yuan Yuan, Jun Tan, Fusheng Pan
Summary: Alloying with Sn in Mg-xSn-Zn-Ca-Ce alloys can simultaneously increase both strength and electromagnetic shielding effectiveness. This is achieved through grain refinement, texture strengthening, and precipitation strengthening, resulting in regularly arranged Mg2Sn precipitates in the basal plane, contributing to great electromagnetic shielding capability.
ADVANCED ENGINEERING MATERIALS
(2021)
Article
Materials Science, Multidisciplinary
Jianhua Chen, Weiying Huang, Bing Liu, Hiromi Nagaumi, Xuyue Yang
Summary: In this study, the creep behaviors of dilute Mg-Mn-Zn alloys with bimodal and homogeneous grain microstructures were investigated. The samples exhibited different types of dislocation slip and creep mechanisms depending on the direction of loading. The bimodal grain microstructure accelerated creep and resulted in inferior creep resistance compared to the homogeneous microstructure.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2023)
Article
Nanoscience & Nanotechnology
Xiaoying Qian, Yuyang Gao, Zhihua Dong, Bin Jiang, Chao He, Cuihong Wang, Ang Zhang, Baoqing Yang, Changyong Zheng, Fusheng Pan
Summary: The micro addition of Ca effectively increases the strength and ductility of Mg-Zn-Ce alloy by enhancing alloying segregation at grain boundary. The addition of Ca leads to enhanced Zn segregation and co-segregation of Zn, Ce, and Ca. This is attributed to the decreased segregation energy and promoted diffusion process of Zn by Ca, which accelerates the thermodynamic and kinetic process of segregation. The controllable segregation at grain boundary, induced by Ca, contributes to the development of advanced magnesium alloys by stabilizing grain boundary, refining grain size, inhibiting dislocation mobility, improving strength, and enhancing grain boundary cohesion and ductility.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2023)
Article
Metallurgy & Metallurgical Engineering
Hewei Chen, Bo Yuan, Rui Zhao, Xiao Yang, Zhanwen Xiao, Antoniac Aurora, Bita Ana Iulia, Xiangdong Zhu, Antoniac Vasile Iulian, Xingdong Zhang
Summary: Alloying treatment is an effective method to regulate the degradation rate of magnesium-based materials. In this study, three magnesium alloys were fabricated and evaluated for their corrosion resistance and degradation rate. The addition of zinc and silver enhanced the antibacterial potential of the magnesium alloys. In vitro cell experiments demonstrated the good biocompatibility of these alloys.
JOURNAL OF MAGNESIUM AND ALLOYS
(2022)
Article
Metallurgy & Metallurgical Engineering
Xiyu Yao, Jincheng Tang, Yinghao Zhou, Andrej Atrens, Matthew S. Dargusch, Bjoern Wiese, Thomas Ebel, Ming Yan
Summary: Utilizing selective laser melting (SLM) for surface modification of magnesium alloys can simultaneously improve corrosion behavior and microhardness, reducing corrosion rate and increasing microhardness while maintaining good biocompatibility. This approach demonstrates the potential of SLM for developing advanced biomedical magnesium alloys.
JOURNAL OF MAGNESIUM AND ALLOYS
(2021)
Article
Materials Science, Multidisciplinary
Chiamaka Okafor, Amit Datye, Shuhan Zhang, Udo D. Schwarz, Yong Cai, Norman Munroe
Summary: This study successfully improved the mechanical and degradation properties of Mg-based bioresorbable stent materials by incorporating lithium. The enhancement was achieved through the reduction of secondary phases, formation of a lithium carbonate surface coating, and phase transformation.
MATERIALS TODAY COMMUNICATIONS
(2022)
Article
Nanoscience & Nanotechnology
Deping Zhang, Jinhui Zhang, Yaqin Zhang, Boqiong Li, Yali Zhao, Chaojie Che, Dongdong Zhang, Jian Meng
Summary: This study investigated the creep behavior and microstructure evolution of cast Mg-48m-2Yb-0.6Zn-0.4Zr alloy. The alloy exhibited temperature-dependent stress exponents and high creep activation energies. The main creep mechanisms were identified as dislocation cross-slip and climb, with the precipitation of intermetallics effectively arresting dislocations and contributing to higher creep resistance.
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)