Article
Metallurgy & Metallurgical Engineering
Wei Liu, Yu Su, Yuntao Zhang, Liwen Chen, Hua Hou, Yuhong Zhao
Summary: This study investigates the variation in LPSO structures, dynamic recrystallization, and mechanical performance of Mg89Y4Zn2Li5 alloys fabricated at different extrusion speeds and die angles. It is found that the block 18R LPSO structures elongate while the lamellar 14H LPSO structures dissolve. The hot-extruded alloys exhibit a full DRX microstructure, and the DRX grain size decreases with decreasing extrusion speed and die angle. The Mg89Y4Zn2Li5 alloy achieves an excellent strength-ductility balance at a low extrusion speed and small die angle.
JOURNAL OF MAGNESIUM AND ALLOYS
(2023)
Article
Materials Science, Multidisciplinary
Guoxin Wang, Pingli Mao, Zhi Wang, Le Zhou, Feng Wang, Zheng Liu
Summary: The hot deformation and dynamic recrystallization (DRX) characteristics of an as-extruded Mg-2.5Zn-4Y alloy containing long-period stacking ordered (LPSO) phases were investigated. It was found that low flow stress was associated with high temperature and low strain rate. An increase in deformation temperature resulted in more dynamic recrystallization. Moreover, decreasing strain rate at a given deformation temperature reduced dislocation pile-up and promoted dynamic recrystallization, leading to lower stress. The test alloy's activation energy value was determined as 212.144 kJ/mol.
Article
Chemistry, Physical
Jiaxin Zhang, Xin Ding, Ruirun Chen, Jinshan Zhang
Summary: This article investigates the difference in corrosion behavior between transverse and longitudinal sections of hot-extruded Mg alloys containing long period stacking ordered (LPSO) phase. Increasing the ram speed can enhance the basal texture and improve the corrosion resistance. Larger dynamically recrystallized (DRXed) grains with a higher volume fraction and finer scaled LPSO strips are beneficial to the corrosion properties.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Metallurgy & Metallurgical Engineering
Jinlong Fu, Wenbo Du, Linyue Jia, Yunfeng Wang, Xunming Zhu, Xian Du
Summary: The solid-soluted Mg-10Gd-1Er-1Zn-0.6Zr alloy exhibited stacking faults and long period stacking ordered phase on the basal planes, with a higher volume fraction of the LPSO phase formed at lower cooling rates. Different cooling rates also influenced the precipitation and tensile properties of the alloy, with the water-quenched sample showing the strongest hardening response.
JOURNAL OF MAGNESIUM AND ALLOYS
(2021)
Article
Metallurgy & Metallurgical Engineering
Ce Zheng, Shuai-Feng Chen, Rui-Xue Wang, Shi-Hong Zhang, Ming Cheng
Summary: The study found that LPSO phases are prone to severe kinking under higher hydrostatic pressure induced by can-compression. The high dislocation density during can-compression process is the main reason for the enhanced LPSO kinking. Additionally, a competitive relationship between intergranular 18R-LPSO phase and intragranular 14H-LPSO phase was observed, impacting each other's kink behaviors significantly.
ACTA METALLURGICA SINICA-ENGLISH LETTERS
(2021)
Article
Chemistry, Physical
Rui Han, Jie Zheng, Zhaoming Yan, Leichen Jia, Jingjing Jia, Liang Liu, Zhimin Zhang, Yong Xue
Summary: This study investigated the evolution of stress-strain curves, microstructure changes, and the behavior of the long-period stacking-ordered (LPSO) phase in a Mg-Gd-Y-Zn-Zr alloy under different thermal compression conditions. The results indicate that increasing deformation temperature and decreasing strain rate promote the occurrence of dynamic recrystallization.
Article
Materials Science, Multidisciplinary
Ming Li, Xu Wang, Zhengbing Xiao, Yu Liu, Yuanchun Huang
Summary: The formation conditions and influence mechanisms of the heterogeneous bimodal microstructure of Mg-9.8Gd-3.5Y-2.0Zn-0.4Zr alloy were systematically studied. It was found that specific deformation conditions can lead to the formation of a heterogeneous bimodal microstructure composed of fine recrystallized grains and coarsely deformed grains. Additionally, the deformation parameters were found to have a strong influence on the long-period stacking order phase and grain boundary segregation.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2023)
Article
Materials Science, Multidisciplinary
Xu Wang, Yongxing Zhao, Yuanchun Huang
Summary: Hot extrusion was used to study the Mg-10Gd-3Y-1.5Zn-0.5Zr alloy, focusing on microstructure evolution, texture configuration and elevated-temperature mechanical properties. The results showed that the LPSO phase network, which was distributed along grain boundaries in the as-cast and homogenized alloys, was broken and elongated after extrusion. The extruded alloy exhibited excellent elevated-temperature mechanical properties, which could be attributed to the presence of streamline-distributed LPSO, numerous SFs with nano spacing, and the texture strengthening effect of hard grain orientation.
METALS AND MATERIALS INTERNATIONAL
(2023)
Article
Metallurgy & Metallurgical Engineering
Q. Q. Jin, X. H. Shao, Y. T. Zhou, B. Zhang, S. J. Zheng, X. L. Ma
Summary: The formation of beta' phase in an Mg88Co5Y7 alloy after aging or electron beam irradiation has been studied using high-angle annular dark-field scanning transmission electron microscopy (HAADF-STEM). It was found that beta' phase precipitated only in the Mg matrix and not in the LPSO structures after aging. However, the LPSO structures with stacking defects transformed into the beta'-long phase during electron beam irradiation.
JOURNAL OF MAGNESIUM AND ALLOYS
(2022)
Article
Nanoscience & Nanotechnology
Yuxiang Han, Sihang He, Tao Chen, Jianbo Shao, Chuming Liu, Zhiyong Chen, Zhao Yang
Summary: This research investigated the microstructure and mechanical properties of Mg97Y2Zn1 alloys rolled at different temperatures. The pre-rolled alloy had alpha-Mg matrix, 18R LPSO phase, and 14H LPSO phase. After rolling, both the 18R LPSO phase and 14H LPSO phase showed obvious kinks, and the alloy rolled at 500 degrees C experienced severe dynamic recrystallization. Tensile testing indicated that the alloy rolled at 450 degrees C had higher yield strength, while the alloy rolled at 500 degrees C had higher ultimate tensile strength and ductility.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2022)
Article
Materials Science, Multidisciplinary
Mozhgan Shokri, Abbas Zarei-Hanzaki, Hamid Reza Abedi, Jae Hyung Cho
Summary: The study investigated the correlation between microstructure/texture evolutions and high temperature flow behavior in Mg alloy containing long period stacking order (LPSO) phases. The annealing treatment effectively strengthened the alloy and decreased ductility, with blocky LPSO assisting dynamic recrystallization and lamellar LPSO increasing alloy strength. The findings suggest that microstructure and texture evolution play a significant role in the high-temperature behavior of the Mg alloy.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2021)
Article
Chemistry, Physical
Yali Duan, Jianmin Yu, Beibei Dong, Huifang Zhang, Mu Meng, Mei Cheng, Zhimin Zhang, Baohong Zhang, Hongyuan Hao, Ping Xu, Huiling Liu
Summary: Rotating backward extrusion (RBE) is a severe plastic deformation (SPD) method used to produce cylindrical components with very large strain by a single pass. The cup-shaped sample formed by RBE exhibited a typical gradient microstructure, with the average grain size decreasing along the radial direction due to different strains and strain rates in different regions. The center region showed the highest deformation and the edge region exhibited the lowest deformation in the RBEed sample.
Article
Materials Science, Multidisciplinary
Z. Aalipour, A. Zarei-Hanzaki, A. Moshiri, H. R. Abedi, Daudi Waryoba, A. Kisko, L. P. Karjalainen
Summary: The microstructure and microtexture changes of an extruded and annealed magnesium alloy were investigated under different strain and processing conditions. The results showed that the material underwent noticeable refinement even at low applied compressive strain. Recrystallization process was completed at a true strain of 0.3, and grain refinement was attributed to the LSN and CDRX mechanisms. At higher strain levels, most grains were found in deformed states and the microtexture only changed in terms of intensity.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2022)
Article
Metallurgy & Metallurgical Engineering
Jinshu Xie, Lele Wang, Jinghuai Zhang, Liwei Lu, Zhi Zhang, Yuying He, Ruizhi Wu
Summary: The effects of fine-grain structure on the mechanical and anti-corrosion properties of magnesium alloys were studied, achieving high strength, good elongation, and low corrosion rate. The weak anodic nature of the nano-lamellar structure was identified for the first time, showing excellent corrosion resistance. Designing magnesium alloys with high mechanical and anti-corrosion properties was proposed through the construction of a homogeneous potential strengthening microstructure.
JOURNAL OF MAGNESIUM AND ALLOYS
(2023)
Article
Materials Science, Multidisciplinary
Di Zhao, Chaoyue Zhao, Xianhua Chen, Yuanding Huang, Norbert Hort, Sarkis Gavras, Fusheng Pan
Summary: This study investigated the compressive deformation behavior of as-extruded magnesium alloys at various deformation temperatures. The results showed that the VZ63 alloy had a higher compressive yield strength at room temperature, a lower deformation activation energy, and a higher fraction of dynamically recrystallized grains.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2022)
Article
Nanoscience & Nanotechnology
Yanghui Jiang, Zhiyong Chen, Congkun Zhan, Tao Chen, Renke Wang, Chuming Liu
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2015)
Article
Nanoscience & Nanotechnology
Zhang Hu, Zhiyong Chen, Jiangying Xiong, Tao Chen, Jianbo Shao, Chuming Liu
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2016)
Article
Nanoscience & Nanotechnology
Jianbo Shao, Zhiyong Chen, Tao Chen, Renke Wang, Yaoling Liu, Chuming Liu
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2018)
Article
Nanoscience & Nanotechnology
Longhui Mao, Chuming Liu, Tao Chen, Yonghao Gao, Shunong Jiang, Renke Wang
SCRIPTA MATERIALIA
(2018)
Article
Nanoscience & Nanotechnology
Tao Chen, Zhiyong Chen, Liu Yi, Jiangying Xiong, Chuming Liu
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2014)
Article
Nanoscience & Nanotechnology
Jiangying Xiong, Zhiyong Chen, Liu Yi, Shaohua Hu, Tao Chen, Chuming Liu
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2014)
Article
Nanoscience & Nanotechnology
Tao Chen, Zhiyong Chen, Jianbo Shao, Renke Wang, Longhui Mao, Chuming Liu
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2019)
Article
Chemistry, Physical
Kai Li, Zhiyong Chen, Tao Chen, Jianbo Shao, Renke Wang, Chuming Liu
JOURNAL OF ALLOYS AND COMPOUNDS
(2019)
Article
Chemistry, Physical
Tao Chen, Zhiyong Chen, Jianbo Shao, Renke Wang, Longhui Mao, Chuming Liu
JOURNAL OF ALLOYS AND COMPOUNDS
(2020)
Article
Nanoscience & Nanotechnology
Tao Chen, Zhiyong Chen, Jianbo Shao, Renke Wang, Kai Li, Longhui Mao, Chuming Liu
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2019)
Article
Nanoscience & Nanotechnology
Tao Chen, Zhiyong Chen, Jianbo Shao, Yuxiang Han, Longhui Mao, Chuming Liu
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2020)
Article
Materials Science, Multidisciplinary
Jianxiong Xiao, Zhiyong Chen, Jianbo Shao, Tao Chen, Xia Lin, Chuming Liu
MATERIALS CHARACTERIZATION
(2020)
Article
Metallurgy & Metallurgical Engineering
Jianbo Shao, Zhiyong Chen, Tao Chen, Zhang Hu, Xiaojie Zhou, Chuming Liu
JOURNAL OF MAGNESIUM AND ALLOYS
(2016)