Role of oriented stress fields in two-way shape-memory alloys

IMR OpenIR

	Role of oriented stress fields in two-way shape-memory alloys
	Zhang, XM ; Fernandez, J ; Guilemany, JM ; Li, B ; Liu, M ; Sha, XW
	2001
发表期刊	SHAPE MEMORY MATERIALS AND ITS APPLICATIONS
ISSN	0255-5476
卷号	394-3 页码:221-224
摘要	The common procedures of two-way shape memory effect (TWSNE) training include thermomechanical cycling, pseudoelastic cycling and constrained aging. During thermomechanical cycling or pseudoelastic cycling, dislocations are induced by deformation. For constrained aging, precipitates are induced. These defects are irreversible during forward and reverse transformations, However, oriented internal stresses around these defects were stored. TEM observation showed that the oriented strain fields around precipitates in the austenite attributed their strain fields to martensite variant preference during cooling, During heating to austenite, the stress fields around the precipitates can be recovered again The stress fields of the pair dislocation band were analyzed by molecular dynamics (MD) simulation. The MD simulation indicated that oriented tension stress fields in the middle line of the dislocation band are favorable sites for the martensite nucleation and growth to preference variant. It was found that after training under applied stress, some oriented microstress fields in re-oriented martensite have two-way memory effect during forward and reverse transformation. These oriented stress fields can be termed two-way memory stress fields (TWMSF), The TWMSF contribute their stress fields to the formation of the preferential martensite variants that present TWSME.
关键词	CuZnAl shape-memory alloy internal stress field two-way shape-memory effect
收录类别	SCI
语种	英语
WOS研究方向	Materials Science
WOS类目	Materials Science, Multidisciplinary
WOS记录号	WOS:000176290100047
出版者	TRANS TECH PUBLICATIONS LTD
引用统计	被引频次：2[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/321006/112255
专题	中国科学院金属研究所
作者单位	1.Univ Barcelona, ES-08028 Barcelona, Spain 2.Chinese Acad Sci, Inst Met Res, Shenyang 110015, Peoples R China
推荐引用方式 GB/T 7714	Zhang, XM,Fernandez, J,Guilemany, JM,et al. Role of oriented stress fields in two-way shape-memory alloys[J]. SHAPE MEMORY MATERIALS AND ITS APPLICATIONS,2001,394-3:221-224.
APA	Zhang, XM,Fernandez, J,Guilemany, JM,Li, B,Liu, M,&Sha, XW.(2001).Role of oriented stress fields in two-way shape-memory alloys.SHAPE MEMORY MATERIALS AND ITS APPLICATIONS,394-3,221-224.
MLA	Zhang, XM,et al."Role of oriented stress fields in two-way shape-memory alloys".SHAPE MEMORY MATERIALS AND ITS APPLICATIONS 394-3(2001):221-224.