Article
Nanoscience & Nanotechnology
Zhibo Liu, Jiani Sun, Zhigang Yan, Yaojun Lin, Manping Liu, Hans J. Roven, Arne K. Dahle
Summary: This study focuses on improving the ductility of a cast Al-10 wt%Mg alloy by prolonging time and/or increasing temperature during solid-solution treatment to minimize the amount of the brittle Al3Mg2 phase. The amounts of Al3Mg2 decrease and the concentrations of solute Mg increase with prolonging time and/or increasing temperature, resulting in improved ductility and strength. Complete dissolution of the Al3Mg2 phase is achieved through solid-solution treatment at specific temperatures, leading to significant improvements in both ductility and strength.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2021)
Article
Metallurgy & Metallurgical Engineering
Yong-Kang Li, Min Zha, Hai-Long Jia, Si-Qing Wang, Hong-Min Zhang, Xiao Ma, Teng Tian, Pin-Kui Ma, Hui-Yuan Wang
Summary: By using hard plate rolling process, the volume fraction of fine grains in bimodal grain structure can be effectively tailored, resulting in optimized strength and ductility with a high ultimate tensile strength and decent uniform elongation. The desired bimodal grain structure can be achieved by co-regulating particle effects and inhibiting the growth of recrystallized grains.
JOURNAL OF MAGNESIUM AND ALLOYS
(2021)
Article
Nanoscience & Nanotechnology
Yan Jiang, Yunsong Li, Feng Liu
Summary: This work presents detailed and quantitative analysis of the strengthening effects resulting from different secondary phases in as-cast Al-Mg-Si-Cu alloys by varying the content of Ge and Sb. The study elaborates on three different strength-ductility trade-off relations through deformation, embrittling, and strengthening mechanisms using experiments, models, and calculations. The microalloying-modulated strength-ductility trade-offs are closely related to the special microstructures of the alloys, with the modification of fine precipitates playing a significant role in the increased strength. On the other hand, the decreased ductility is determined by the presence of secondary phases, especially the coarse primary phases.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2022)
Article
Materials Science, Multidisciplinary
Rensong Huang, Mengnie Li, Hongfu Yang, Shumeng Lu, Hanning Zuo, Shanju Zheng, Yonghua Duan, Xiaohong Yuan
Summary: Increasing Mg content in the as-cast Al-Zn-Mg-Cu alloys leads to higher amounts of nonequilibrium eutectic structures and tertiary dendrites in the a(Al) matrix. Additionally, the crystallization temperature range decreases with increasing Mg content.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2022)
Article
Materials Science, Multidisciplinary
Min Zha, Jinming M. Liu, Hailong L. Jia, Debei B. Li, Yongkang K. Li, Cheng Wang, Jiawang W. Song, Pinkui K. Ma, Huiyuan Y. Wang
Summary: Novel high-performance Mg-Al-Sn-Zn-Y (ATZ821-xY) alloys were developed via hard-plate rolling (HPR). The addition of Y led to a more uniform grain structure and significant weakening in basal texture for the HPRed ATZ821 alloy. The enhanced properties of the HPRed ATZ821-1.0Y alloy, such as high strength and ductility, are mainly attributed to factors such as grain boundary strengthening, work hardening, and slips induced by Y atoms.
ADVANCED ENGINEERING MATERIALS
(2021)
Review
Metallurgy & Metallurgical Engineering
Zhong-Zheng Jin, Min Zha, Si-Qing Wang, Shi-Chao Wang, Cheng Wang, Hai-Long Jia, Hui-Yuan Wang
Summary: Magnesium alloys show promising potential as lightweight structural materials in transportation and aerospace fields due to their low density and high specific strength. However, most high-strength magnesium alloys exhibit poor formability and ductility at room temperature, limiting their applications. Recent research has focused on enhancing the ductility of magnesium alloys through alloying design strategies and microstructural control using advanced processing technologies.
JOURNAL OF MAGNESIUM AND ALLOYS
(2022)
Article
Materials Science, Multidisciplinary
Tianxu Zheng, Yaobo Hu, Bin Jiang, Liang Fu, Fusheng Pan, Aitao Tang
Summary: This study investigates the impact of Gd elements on the enhancement of ductility in the Mg-Gd-Zr alloy. It was found that Gd elements can reduce the critical resolved shear stress (CRSS) ratio between non-basal slip and basal slip, facilitating the initiation of more non-basal slip systems to accommodate strain. Furthermore, the segregation of Gd elements at grain boundaries was observed to enhance the grain boundary strength of the alloy, which is a significant factor in the enhancement of ductility.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2023)
Article
Nanoscience & Nanotechnology
Sang Hun Shim, Hesam Pouraliakbar, Sun Ig Hong
Summary: Hierarchical structure with microscale granular phase separation and nanoscale intragranular precipitation developed in CrFeNiMn0.5Cu0.5 high entropy alloy due to the reduction of entropy contribution during solidification. The conventional induction casting method produced hierarchical-structured high entropy alloy with extraordinary mechanical properties, surpassing most thermo-mechanically processed high entropy alloys.
SCRIPTA MATERIALIA
(2022)
Article
Nanoscience & Nanotechnology
Xinbiao Wang, Yaojun Lin, Zhibo Liu, Shengfa Liu
Summary: This research aims to reduce the amount and size of Al-Mg intermetallic phases by rapid solidification and improve the strength and ductility of a cast Al-15 wt% Mg alloy. The results show that the alloy processed by twin-roll casting (TRC) has refined Al grains and refined granular Al3Mg2 particles, as well as increased Mg solid solubility and decreased amount of Al3Mg2 phase. The TRC Al-15 wt% alloy exhibits higher yield strength, ultimate tensile strength, and uniform elongation compared to the conventionally mold cast counterpart.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2022)
Article
Materials Science, Multidisciplinary
Zhong-Zheng Jin, Min Zha, Hui-Yuan Wang, Jian-Gang Ma, Yi-Chun Liu
Summary: A Mg6Zn-0.2Ca alloy prepared through rotated hard-plate rolling (RHPR) exhibits high yield strength and ductility simultaneously, thanks to its fine-grained structure, low angle boundaries (LAGBs), and nano-coherent precipitates. This study provides insights into microstructural control strategies for improving the performance of Mg-Zn-Ca alloys.
MATERIALS & DESIGN
(2023)
Article
Materials Science, Multidisciplinary
Zhong-Zheng Jin, Min Zha, Hai-Long Jia, Pin-Kui Ma, Si-Qing Wang, Jia-Wei Liang, Hui-Yuan Wang
Summary: The utilization of SRS combined with HPR process has led to an increase in elongation with maintained tensile strength in Mg-6Zn-0.2Ca alloy. The refined grain structure and eutectic phase, along with the presence of excessive Ca solute atoms, contribute to the enhanced ductility and strain-hardening ability of the alloy.
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
(2021)
Article
Nanoscience & Nanotechnology
Zijian Zhang, Lin Yuan, MingYi Zheng, Debin Shan, Bin Guo
Summary: This study developed a commercial AZ80 alloy with superior strength-ductility synergy through a combination of extrusion and multi-directional forging processes, reaching the level of wrought Mg-RE alloys.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2022)
Article
Engineering, Mechanical
Tong Wang, Min Zha, Yipeng Gao, Si-Qing Wang, Hai -Long Jia, Cheng Wang, Hui-Yuan Wang
Summary: A novel multiscale hetero-structure was prepared in Mg-9Al-1Zn alloy, which exhibited high strength and high ductility. Diversified strain accommodation mechanisms were induced by the strain incompatibilities near hetero-interfaces in the multiscale hetero-structure. Multiple deformation modes were activated substantially, effectively relaxing local stress concentration and achieving stable plastic flow at a high-stress state, which improved strain-hardening ability and strength-ductility synergy.
INTERNATIONAL JOURNAL OF PLASTICITY
(2023)
Article
Materials Science, Multidisciplinary
Xiaofei Cui, Yan Yang, Yong Zhu, Minmin Li, Chen Wen, Bin Jiang, Xiaodong Peng, Fusheng Pan
Summary: In order to improve the properties of as-rolled Mg-3Y alloy, the microstructure was tailored through annealing at different temperatures. The annealing process transformed the deformed grains into equiaxed grains and resulted in a bimodal structure. The alloy annealed at 300 degrees C exhibited the best comprehensive properties, with high ultimate tensile strength, elongation, and corrosion resistance.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2023)
Article
Materials Science, Multidisciplinary
Zhengwei Guo, Guojian Lin, Lu Li, Peng Cao, Zhentao Yuan, Xiao Wang, Quan Shan, Zulai Li
Summary: This study focuses on enhancing the strength and ductility of semi-solid squeeze cast 6TiB2/Al-17Si-4Cu composites through in-situ particle strengthening and T6 heat treatment. The optimized heat treatment process improves the mechanical properties of the composites, and the mechanisms behind the enhancement are discussed.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2022)