Article
Materials Science, Multidisciplinary
Zhaocan Li, Jianmin Yu, Dongliang Lu, Guoqin Wu, Ziwei Zhang, Qilin Zhang, Zhiyi Zheng, Dan Wang, Zhimin Zhang
Summary: The effect of repetitive upsetting and extruding (RUE) on microstructure, texture, and mechanical properties anisotropy of Mg-9Gd-4Y-2Zn-0.4Zr alloy was investigated. Results showed that the RUE process led to grain refinement, texture weakening, and reduced anisotropy of the alloy.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(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
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
Nanoscience & Nanotechnology
Dongdong Zhang, Hucheng Pan, Jingren Li, Dongsheng Xie, Deping Zhang, Chaojie Che, Jian Meng, Gaowu Qin
Summary: Ultrahigh strength is achieved in low-cost Mg-4Sm-0.6Zn-0.4Zr alloy by a traditional extrusion process, showing a bimodal microstructure with fine recrystallized grains, coarse hot-worked grains, and numerous nanoscale particles. This alloy has great potential in industrial applications due to its high strength and simple extrusion process.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2022)
Article
Nanoscience & Nanotechnology
Minghang Zhou, Yuhao Xu, Yi Liu, Meng Duan, Ziyang Xia, Liangshun Huang, Rongzheng Zhu, Han Ye, Liming Peng, Yujuan Wu, Yong Liu
Summary: The microstructure and mechanical properties of GZ151K alloy treated by ultrasonic surface rolling process were investigated in this study. The deformation process introduced twins and dislocations, leading to enhanced microhardness and tensile strength but decreased ductility due to the initiation and extension of microcracks. When the pressure during the USRP was 0.3 MPa, minimal surface roughness and superior mechanical properties could be achieved under twin and dislocation strengthening.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2021)
Article
Metallurgy & Metallurgical Engineering
Feng Li, Wei-li Cheng, Hui Yu, Hong-xia Wang, Xiao-feng Niu, Li-fei Wang, Hang LI, Hua Hou
Summary: A novel low-alloyed Mg-Bi-Y-Zn alloy system was successfully developed and extruded at 673 K. The corrosion behavior and tensile properties of the extruded alloy were investigated, showing a nearly fully recrystallized grain structure with scattered extrusion fiber texture and sub-micron precipitates. The alloy exhibited a change in corrosion mode from galvanic induced pitting corrosion to filiform-like corrosion and mixed pitting corrosion during long-term corrosion processes. The tensile properties and corrosion resistance of the Mg-0.5Bi-0.5Y-0.2Zn (wt.%) alloy were determined, indicating its promising potential in biomedical applications due to the balanced combination of tensile strength and corrosion resistance.
TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA
(2023)
Article
Metallurgy & Metallurgical Engineering
Zhengqiu Li, Deming Zhang, Zhihao Zhao, Chunyang Xia, Yijun Zhu, Ziqi Liu
Summary: In this study, a new type of high-strength Mg-5.5Gd-3.5Nd-0.5Zn-0.4Zr alloy was developed and its microstructures and mechanical properties under different heat treatment conditions were investigated. The T6-treated alloy exhibited excellent tensile properties at 250 degrees C, but the strength significantly decreased and the elongation increased at 300 degrees C due to the activation of dislocation cross-slip.
TRANSACTIONS OF THE INDIAN INSTITUTE OF METALS
(2022)
Article
Materials Science, Multidisciplinary
He Xie, Guohua Wu, Xiaolong Zhang, Wencai Liu, Wenjiang Ding
Summary: This study investigates the specific role of Gd element on the microstructural evolution and mechanical properties of Mg-3Nd-0.2Zn-0.5Zr alloy. It is found that increasing Gd content leads to reduced grain size and substantial enhancements in alloy strength. Microstructure characterization shows that the improved solid-solution strengthening effect from Gd additions plays a key role in the significant strength improvements obtained in the as-quenched alloys.
MATERIALS CHARACTERIZATION
(2021)
Article
Metallurgy & Metallurgical Engineering
He Xie, Guo-hua Wu, Xiao-long Zhang, Zhong-quan LI, Wen-cai Liu, Liang Zhang, Bao-de Sun
Summary: This study investigated the effects of different Y additions on the microstructural evolution and mechanical performance of cast Mg-3Nd-0.2Zn-0.5Zr alloy. The results showed that increasing Y content led to changes in the microstructure and increased strength of the alloy.
TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA
(2022)
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
Chemistry, Physical
Qiang Yang, Xiaohan Wu, Wei Zhang, Zixaing Yan, Guodong Tong, Xuegang Chen, Shuhui Lv, Tao Xu, Jun Li, Xin Qiu
Summary: An ultrathin wall Mg-8Zn-8Al alloy with coarse ix-Mg grains, ultra-fine beta-Mg grains, and nano-sized icosahedral quasicrystal phase particles has been manufactured by high-pressure die casting. The alloy exhibits outstanding strength and acceptable elongation. The observations through HAADF-STEM reveal possible amorphous regions, C-containing phase and/or MgO aggregations, and Zn-rich clusters and pyramidal precipitates. The combination of ultra-fine grains and the skeleton consisting of nano-sized I-phase particles and solutes contributes to the ultra-high strength. In addition, the study indicates the unavoidable interaction of alloy melt with CO2 during ultra-thin wall HPDC and the possibility of pyramidal precipitation in Zn-containing magnesium alloys.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Nanoscience & Nanotechnology
Xicong Ye, Zihao Cheng, Chang Liu, Xin Wu, Luer Yu, Mengyu Liu, Dong Fang, Guangwei Zhao, Bo Li
Summary: The emergence of eutectic high entropy alloys (EHEAs) has led to the design and preparation of a set of low-cost Co-free Fe55Cr15Ni(30-x)Nbx (x = 0, 3, 6, 9, 12, and 15 at.%) EHEAs in this study. The addition of Nb content affects the solidification structure and mechanical properties of the alloys.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2022)
Article
Chemistry, Physical
Zijian Yu, Linlin Liu, Adil Mansoor, Ke Liu, Shubo Li, Wenbo Du
Summary: In this study, a high-performance Mg-8Gd-2Y-1Zn-6Li alloy was successfully fabricated, showing significant improvements in yield strength and ultimate tensile strength. The investigation of intermetallic compounds revealed the unique microstructure features and the discovery of a novel island-like beta(1R) phase in Mg-Gd-Li based alloys. These structural components contribute to the high performance of the alloy.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Metallurgy & Metallurgical Engineering
Jie Zheng, Zhaoming Yan, Jinsheng Ji, Yusha Shi, Heng Zhang, Zhimin Zhang, Yong Xue
Summary: This article discusses the effects of heat treatment on the properties of the as-cast Mg-9.5Gd-4Y-2.2Zn-0.5Zr alloy at room temperature, as well as the mechanical properties and microstructure evolution of various peak-aging samples at different tensile temperatures. The optimal heat treatment process for the alloy is determined to be 520°C x 24 h + 200°C x 112 h. The strength initially increases and then decreases as the tensile temperature increases, while the ductility monotonously increases.
JOURNAL OF MAGNESIUM AND ALLOYS
(2022)
Article
Chemistry, Physical
Adil Mansoor, Wenbo Du, Zijian Yu, Ning Ding, Junjian Fu, Feng Lou, Ke Liu, Shubo Li
Summary: The effects of grain refinement and precipitate evolution on the mechanical performance of Mg-12Gd-2Er-0.4Zr alloy fabricated by double extrusion are analyzed. The results show that double extrusion leads to the fragmentation of bulky precipitates and the formation of fine precipitates, resulting in a refined grain structure and increased content of rare-earth elements. The presence of fine precipitates and refined grains contributes to a high yield strength and elongation in the alloy.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
