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Role of oriented stress fields in two-way shape-memory alloys
Zhang, XM; Fernandez, J; Guilemany, JM; Li, B; Liu, M; Sha, XW
2001
Source PublicationSHAPE MEMORY MATERIALS AND ITS APPLICATIONS
ISSN0255-5476
Volume394-3Pages:221-224
AbstractThe 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.
KeywordCuZnAl shape-memory alloy internal stress field two-way shape-memory effect
Indexed BySCI
Language英语
WOS Research AreaMaterials Science
WOS SubjectMaterials Science, Multidisciplinary
WOS IDWOS:000176290100047
PublisherTRANS TECH PUBLICATIONS LTD
Citation statistics
Cited Times:1[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/112255
Collection中国科学院金属研究所
Affiliation1.Univ Barcelona, ES-08028 Barcelona, Spain
2.Chinese Acad Sci, Inst Met Res, Shenyang 110015, Peoples R China
Recommended Citation
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.
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