Microstructure evolution and dynamic recrystallization mechanisms of Mg-Al-Ca-Zn-Sn-Mn alloys with different Ca contents during hot extrusion

doi:10.1016/j.jallcom.2024.178400

IMR OpenIR

	Microstructure evolution and dynamic recrystallization mechanisms of Mg-Al-Ca-Zn-Sn-Mn alloys with different Ca contents during hot extrusion
	Wang, Xizao 1,2; Luo, Tianjiao 1; Zheng, Ce 1; Li, Yingju 1; Huang, Qiuyan 1; Yang, Yuansheng 1
通讯作者	Yang, Yuansheng(ysyang@imr.ac.cn)
	2025-01-15
发表期刊	JOURNAL OF ALLOYS AND COMPOUNDS
ISSN	0925-8388
卷号	1011 页码:13
摘要	Enhancing the strength of Mg-Al-Ca series alloys can significantly expand their range of applications. In this study, we examined the mechanical properties of Mg-Al-Ca-Zn-Sn-Mn alloys with different Ca contents. The study revealed that increased Ca content contributes to higher strength, resulting in approximate increases of 100 MPa. As a result, a high-strength Mg-6Al-5Ca-1Zn-1Sn-Mn alloy with a strength exceeding 300 MPa has been successfully developed. The as-extruded Mg-6Al-5Ca-1Zn-1Sn-Mn alloy shows a bimodal microstructure consisting of DRXed grains alongside elongated unDRXed grains. Further exploration was undertaken regarding the microstructure evolution of the experimental alloys, accompanied by an in-depth analysis of the dynamic recrystallization mechanisms. At the early stage, the (1012) extrusion twinning is the primary deformation mechanism, whereas the PSN mechanism dominates the DRX process in the late stage of hot extrusion. A high density of nano-precipitates, combined with the decreased mobility of non-basal slips, greatly hinders the dynamic recrystallization process in the alloy with higher Ca content. Additionally, increased Ca content enhances the activity of non-basal slips and promotes the formation of the RE texture. Finally, a quantitative analysis focused on the strengthening mechanisms was performed, while a qualitative assessment of the plasticity mechanisms was conducted. It was determined that grain boundary strengthening and texture strengthening are the key factors contributing to the high strength, whereas more twins and second-phase particles tends to reduce ductility. This investigation provides important insights that can contribute to the progressive development of high-strength flame-retardant Mg-Al-Ca series alloys.
关键词	Microstructure PSN High strength Dynamic recrystallization Mg-Al-Ca
资助者	National Key Research and Devel-opment Program of China ; Key Research and Development Plan of Shanxi Province ; Applied Basic Research Program Project of Liaoning Province of China
DOI	10.1016/j.jallcom.2024.178400
收录类别	SCI
语种	英语
资助项目	National Key Research and Devel-opment Program of China[2021YFB3701100] ; Key Research and Development Plan of Shanxi Province[202102050201005] ; Applied Basic Research Program Project of Liaoning Province of China[2023020253-JH2/1016]
WOS研究方向	Chemistry ; Materials Science ; Metallurgy & Metallurgical Engineering
WOS类目	Chemistry, Physical ; Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
WOS记录号	WOS:001405025800001
出版者	ELSEVIER SCIENCE SA
引用统计	被引频次：1[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/321006/180395
专题	中国科学院金属研究所
通讯作者	Yang, Yuansheng
作者单位	1.Chinese Acad Sci, Inst Met Res, Shenyang 110016, Peoples R China 2.Univ Sci & Technol China, Sch Mat Sci & Engn, Shenyang 110016, Peoples R China
推荐引用方式 GB/T 7714	Wang, Xizao,Luo, Tianjiao,Zheng, Ce,et al. Microstructure evolution and dynamic recrystallization mechanisms of Mg-Al-Ca-Zn-Sn-Mn alloys with different Ca contents during hot extrusion[J]. JOURNAL OF ALLOYS AND COMPOUNDS,2025,1011:13.
APA	Wang, Xizao,Luo, Tianjiao,Zheng, Ce,Li, Yingju,Huang, Qiuyan,&Yang, Yuansheng.(2025).Microstructure evolution and dynamic recrystallization mechanisms of Mg-Al-Ca-Zn-Sn-Mn alloys with different Ca contents during hot extrusion.JOURNAL OF ALLOYS AND COMPOUNDS,1011,13.
MLA	Wang, Xizao,et al."Microstructure evolution and dynamic recrystallization mechanisms of Mg-Al-Ca-Zn-Sn-Mn alloys with different Ca contents during hot extrusion".JOURNAL OF ALLOYS AND COMPOUNDS 1011(2025):13.