Reasonable utilization of {10-12} twin for optimizing microstructure and improving mechanical property in a Mg-Gd-Y alloy

doi:10.1016/j.matdes.2020.108600

IMR OpenIR

	Reasonable utilization of {10-12} twin for optimizing microstructure and improving mechanical property in a Mg-Gd-Y alloy
	Lu, S. H.1,2; Wu, D.1; Chen, R. S.1; Han, En-Hou 1
通讯作者	Wu, D.(dwu@imr.ac.cn) ; Chen, R. S.(rschen@imr.ac.cn)
	2020-06-01
发表期刊	MATERIALS & DESIGN
ISSN	0264-1275
卷号	191 页码:21
摘要	During the deformation of Mg alloys, {10-12} extension twin, as one of the most active deformation mechanisms, contributed much to the formation of basal texture, yet little to dynamic recrystallization (DRX) grains, i.e., effective grain refinement. In this work, {10-12} extension twin had been creatively utilized to achieve grain refinement and property improvement in a Mg-Gd-Y alloy by multi-directional impact forging (MDIF). Firstly, flourishing {10-12} extension twins divided the parent grain into many fine independent regions (similar to 10 mu m). Meanwhile, a large number of twin boundaries were pinning mainly by interaction with neighboring dislocations in twin or matrix. Secondly, those pinned twin boundaries can effectively accumulate dislocation slips and promote the formation of extensive low angle grain boundaries (LAGBs). These high densities of LAGBs can further subdivide the independent regions provided by extension twins into micro-regions (similar to 5 mu m). Thirdly, those fine micro-regions developed to be DRX after a dynamic recovery. Finally, we obtained a yield isotropy high-strength Mg alloy with an ultimate tensile strength of 354 MPa after MDIF of 110 passes. This work proposed a brand new insight to prepare wrought Mg alloy with fine grain, yet without strong texture, which is beneficial to better formability and mechanical property isotropy. (C) 2020 The Authors. Published by Elsevier Ltd.
关键词	Mg alloy Forging Twin DRX Texture
资助者	National Key Research and Development Program of China ; National Natural Science Foundation of China (NSFC) ; National Science and Technology Major Project of China ; Natural Science Foundation of Liaoning province
DOI	10.1016/j.matdes.2020.108600
收录类别	SCI
语种	英语
资助项目	National Key Research and Development Program of China[2016YFB0301104] ; National Natural Science Foundation of China (NSFC)[51531002] ; National Natural Science Foundation of China (NSFC)[51301173] ; National Natural Science Foundation of China (NSFC)[51601193] ; National Natural Science Foundation of China (NSFC)[51701218] ; National Science and Technology Major Project of China[2017ZX04014001] ; Natural Science Foundation of Liaoning province[20180550799]
WOS研究方向	Materials Science
WOS类目	Materials Science, Multidisciplinary
WOS记录号	WOS:000536937200022
出版者	ELSEVIER SCI LTD
引用统计	被引频次：52[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/321006/139165
专题	中国科学院金属研究所
通讯作者	Wu, D.; Chen, R. S.
作者单位	1.Chinese Acad Sci, Inst Met Res, Grp Magnesium Alloys & Their Applicat, 62 Wencui Rd, Shenyang 110016, Peoples R China 2.Univ Sci & Technol China, Sch Mat Sci & Engn, 72 Wenhua Rd, Shenyang 110016, Peoples R China
推荐引用方式 GB/T 7714	Lu, S. H.,Wu, D.,Chen, R. S.,et al. Reasonable utilization of {10-12} twin for optimizing microstructure and improving mechanical property in a Mg-Gd-Y alloy[J]. MATERIALS & DESIGN,2020,191:21.
APA	Lu, S. H.,Wu, D.,Chen, R. S.,&Han, En-Hou.(2020).Reasonable utilization of {10-12} twin for optimizing microstructure and improving mechanical property in a Mg-Gd-Y alloy.MATERIALS & DESIGN,191,21.
MLA	Lu, S. H.,et al."Reasonable utilization of {10-12} twin for optimizing microstructure and improving mechanical property in a Mg-Gd-Y alloy".MATERIALS & DESIGN 191(2020):21.