Microstructure, texture and mechanical properties in an as-cast AZ61 Mg alloy during multi-directional impact forging and subsequent heat treatment

IMR OpenIR

	Microstructure, texture and mechanical properties in an as-cast AZ61 Mg alloy during multi-directional impact forging and subsequent heat treatment
	Jiang, M. G.; Yan, H.; Chen, R. S.; hyan@imr.ac.cn; rschen@imr.ac.cn
	2015
发表期刊	MATERIALS & DESIGN
ISSN	0261-3069
卷号	87 页码:891-900
摘要	Multi-directional impact forging (MDIF) and subsequent heat treatment were applied to an as-cast AZ61 Mg alloy and the microstructure, texture evolution and mechanical properties were systematically investigated. The microstructural evolution during MDIF was classified into twinning-active and dynamic recrystallization (DRX)-predominant stages. During the early forging passes, a complicated twinning behavior was observed, including {10-12} primary, {10-12}-{10-12} secondary and {10-12}-{10-12}-{10-12} ternary twins with various twin variants, and even detwinning behavior. With further continuous forging, {10-12} twins disappeared leading to the formation of coarse DRXed grains, and fine DRXed grains began to nucleate at serrated grain boundaries of the coarse DRXed grains due to discontinuous DRX mechanism and progressively consumed the coarse DRXed grains, eventually resulting in a bimodal microstructure. Meanwhile, as-cast random texture turned into a special non-basal texture. After subsequent heat treatment at 400 degrees C for 2 h, the coarse eutectic network completely disappeared with fine beta-Mg17AlI2 particles uniformly locating at grain boundaries and the non-basal texture stayed stable, thereby resulting in a good balance of strength (ultimate tensile strength of 259 MPa) and ductility (20.6%). (C) 2015 Elsevier Ltd. All rights reserved.
部门归属	[jiang, m. g. ; yan, h. ; chen, r. s.] chinese acad sci, grp magnesium alloys & their applicat, inst met res, shenyang 110016, peoples r china ; [jiang, m. g.] univ chinese acad sci, beijing 100049, peoples r china
关键词	Magnesium Alloy Forging Twinning Dynamic Reaystallization Texture Mechanical Properties
资助者	National Basic Research Program of China (973 Program) [2013CB632202]; National Natural Science Foundation of China (NSFC) [51301173]
收录类别	sci
语种	英语
WOS记录号	WOS:000363816000101
引用统计	被引频次：70[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/321006/74997
专题	中国科学院金属研究所
通讯作者	hyan@imr.ac.cn; rschen@imr.ac.cn
推荐引用方式 GB/T 7714	Jiang, M. G.,Yan, H.,Chen, R. S.,et al. Microstructure, texture and mechanical properties in an as-cast AZ61 Mg alloy during multi-directional impact forging and subsequent heat treatment[J]. MATERIALS & DESIGN,2015,87:891-900.
APA	Jiang, M. G.,Yan, H.,Chen, R. S.,hyan@imr.ac.cn,&rschen@imr.ac.cn.(2015).Microstructure, texture and mechanical properties in an as-cast AZ61 Mg alloy during multi-directional impact forging and subsequent heat treatment.MATERIALS & DESIGN,87,891-900.
MLA	Jiang, M. G.,et al."Microstructure, texture and mechanical properties in an as-cast AZ61 Mg alloy during multi-directional impact forging and subsequent heat treatment".MATERIALS & DESIGN 87(2015):891-900.