PLC effect and its explanation of LA41 magnesium alloys

IMR OpenIR

	PLC effect and its explanation of LA41 magnesium alloys
	Wang, C ; Xu, YB ; Han, EH
通讯作者	Wang, C(congwang@imr.ac.cn)
	2006-02-11
发表期刊	ACTA METALLURGICA SINICA
ISSN	0412-1961
卷号	42 期号:2 页码:191-194
摘要	Uni-axial tensile deformation of LA41 magnesium alloy has been carried out and PLC (Portevin-Le Chatelier) effect, also known as serrated flow or plastic instability, is observed. This kind of alloy exhibits negative strain rate sensitivity (SRS) at room temperature, that is, SRS is negative at the strain rate range from 3.33 x 10(-4) to 6.66 x 10(-3) s(-1) at ambient temperature. Both ultimate stress (sigma(b)) and 0.2% proof stress (sigma(0.2)) decrease with increasing strain rate, whilst critical strain (epsilon(c)) of serrated flow is found to rise with enhancing strain rate. A new explanation for this unusual phenomenon is presented. The model of dynamic strain aging (DSA) is established though diffusion of solute atoms to mobile dislocations, which are temporarily arrested at obstacles. Such interaction renders the movement of mobile dislocations more difficult, consequently, necessitates the required force to overcome the obstacles.
关键词	magnesium alloy PLC effect dynamic strain aging strain rate sensitivity
收录类别	SCI
语种	英语
WOS研究方向	Metallurgy & Metallurgical Engineering
WOS类目	Metallurgy & Metallurgical Engineering
WOS记录号	WOS:000235929000017
出版者	SCIENCE PRESS
引用统计	被引频次：9[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/321006/85527
专题	中国科学院金属研究所
通讯作者	Wang, C
作者单位	1.Chinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, Shenyang 110016, Peoples R China 2.Chinese Acad Sci, Inst Met Res, Environm Corros Ctr, Shenyang 110016, Peoples R China
推荐引用方式 GB/T 7714	Wang, C,Xu, YB,Han, EH. PLC effect and its explanation of LA41 magnesium alloys[J]. ACTA METALLURGICA SINICA,2006,42(2):191-194.
APA	Wang, C,Xu, YB,&Han, EH.(2006).PLC effect and its explanation of LA41 magnesium alloys.ACTA METALLURGICA SINICA,42(2),191-194.
MLA	Wang, C,et al."PLC effect and its explanation of LA41 magnesium alloys".ACTA METALLURGICA SINICA 42.2(2006):191-194.