Exploring the effect of bimodal microstructure on the mechanical properties of Mg-15Er binary alloy by regulating the extrusion ratio

doi:10.1016/j.jmrt.2023.12.152

IMR OpenIR

	Exploring the effect of bimodal microstructure on the mechanical properties of Mg-15Er binary alloy by regulating the extrusion ratio
	Li, R. G.1; Zhu, J. X.1; Liu, B. S.1; Zhang, H.1; Li, S. S.1; Wu, D.2; Sha, S.1; Guo, S. G.1
通讯作者	Zhang, H.(zhanghang@syuct.edu.cn) ; Wu, D.(dwu@imr.ac.cn)
	2024
发表期刊	JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
ISSN	2238-7854
卷号	28 页码:2379-2387
摘要	Bimodal-grained Mg-Gd alloys exhibits excellent mechanical strength due to the high solid solubility of Gd element, which facilitates the strong precipitation strengthening. Er element has a higher solid-solubility than Gd in Mg, which may have a great potential in achieving high strength for Mg alloy. In the study, the Mg-15Er alloy with bimodal microstructure of different proportion of two components is fabricated by adjusting the extrusion ratio and microstructures and mechanical properties for the bimodal-structured Mg-15Er alloy are systematically investigated. The results suggest that the ErH2 phase in the Mg-15Er alloys is stable, regardless of the casting state, solid solution state, or extrusion state. Only a small number of dynamic precipitates is formed during extrusion due to the high solid solubility of Er in Mg. Moreover, the formation of dynamic precipitated MgEr3 phase, where the number of Er atoms is greater than that of Mg atoms, also leads to the inability to form highdensity precipitates. The larger extrusion ratio results in higher volume fraction of dynamic recrystallization (from 24 % to 89 %), and larger grain size (from 4.1 mu m to 7.9 mu m). The results show that the ultimate tensile strength decreases from 301 MPa to 235 MPa, and the elongation increases from 12.5 % to 23.5 % with the increase of the extrusion ratio, which are primarily related to the components of unrecrystallized grains and recrystallized grains rather than dynamic precipitates.
关键词	Mg -Er binary alloy Extrusion Microstructure ErH 2 phase Mechanical properties
资助者	National Natural Science Foundation of China ; Natural Science Foundation of Liaoning Province of China
DOI	10.1016/j.jmrt.2023.12.152
收录类别	SCI
语种	英语
资助项目	National Natural Science Foundation of China[52171121] ; National Natural Science Foundation of China[51971151] ; National Natural Science Foundation of China[52201132] ; National Natural Science Foundation of China[52201131] ; National Natural Science Foundation of China[52171055] ; National Natural Science Foundation of China[52371037] ; Natural Science Foundation of Liaoning Province of China[2022-NLTS-18-01]
WOS研究方向	Materials Science ; Metallurgy & Metallurgical Engineering
WOS类目	Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
WOS记录号	WOS:001145596500001
出版者	ELSEVIER
引用统计	被引频次：6[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/183652
专题	中国科学院金属研究所
通讯作者	Zhang, H.; Wu, D.
作者单位	1.Shenyang Univ Chem Technol, Sch Mech & Power Engn, Shenyang 110142, Peoples R China 2.Chinese Acad Sci, Shi Changxu Innovat Ctr Adv Mat, Inst Met Res, Shenyang 110016, Peoples R China
推荐引用方式 GB/T 7714	Li, R. G.,Zhu, J. X.,Liu, B. S.,et al. Exploring the effect of bimodal microstructure on the mechanical properties of Mg-15Er binary alloy by regulating the extrusion ratio[J]. JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T,2024,28:2379-2387.
APA	Li, R. G..,Zhu, J. X..,Liu, B. S..,Zhang, H..,Li, S. S..,...&Guo, S. G..(2024).Exploring the effect of bimodal microstructure on the mechanical properties of Mg-15Er binary alloy by regulating the extrusion ratio.JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T,28,2379-2387.
MLA	Li, R. G.,et al."Exploring the effect of bimodal microstructure on the mechanical properties of Mg-15Er binary alloy by regulating the extrusion ratio".JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T 28(2024):2379-2387.