IMECH-IR  > 流固耦合系统力学重点实验室
In-situ investigation of dynamic deformation in NiTi shape memory alloys under laser induced shock
Wang X(王曦); Xia WG(夏伟光); Wu XQ(吴先前); Wei YP(魏延鹏); Huang CG(黄晨光); Wang, X (reprint author), Beijing Jiaotong Univ, Sch Mech Elect & Control Engn, Beijing 100044, Peoples R China.
Source PublicationMECHANICS OF MATERIALS
2017-11-01
Volume114Pages:69-75
ISSN0167-6636
AbstractThe free surface particle velocity of NiTi target shocked with a pulsed laser beam was measured with a photonic Doppler velocimetry (PDV) system to study the dynamic deformation behavior of NiTi alloys at ultra-high strain rate of 10(6)similar to 10(7)/s. Through the analysis of the particle velocity profiles, the shock wave intensity was found to have the influence on the process of austenite-martensite transformation. Theoretical analysis of shock wave propagation showed that the first plateau in the velocity profile was caused by martensitic transformation and the second plateau if existing is caused by the subsequent plastic yielding of shock induced martensite. Residual martensite of the NiTi, which exhibited as needlelike structures, was observed in the laser shocked region. Based on the present results, and the studies by Nemat-Nasser et al. (2005), Liao et al. (2012), and Wang et al. (2013), we concluded that laser induced shock can cause the martensitic transformation as long as the laser induced shock pressure reaches a critical value. The dynamic transition stress and the dynamic tensile strength of NiTi alloys were also determined from the experimentally measured surface velocity profile. (C) 2017 Elsevier Ltd. All rights reserved.
KeywordShape Memory Alloy Laser Induced Shock Martensitic Transformation Strain Rate Photonic Doppler Velocimetry
DOI10.1016/j.mechmat.2017.06.009
Indexed BySCI ; EI
Language英语
WOS IDWOS:000417009200006
WOS KeywordPLASTICITY ; MODEL
WOS Research AreaMaterials Science ; Mechanics
WOS SubjectMaterials Science, Multidisciplinary ; Mechanics
Funding OrganizationNational Natural Science Foundation of China [11002150, 11332011, 11402277]
Classification二类
Ranking2
Citation statistics
Cited Times:2[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://dspace.imech.ac.cn/handle/311007/72128
Collection流固耦合系统力学重点实验室
Corresponding AuthorWang, X (reprint author), Beijing Jiaotong Univ, Sch Mech Elect & Control Engn, Beijing 100044, Peoples R China.
Recommended Citation
GB/T 7714
Wang X,Xia WG,Wu XQ,et al. In-situ investigation of dynamic deformation in NiTi shape memory alloys under laser induced shock[J]. MECHANICS OF MATERIALS,2017,114:69-75.
APA 王曦,夏伟光,吴先前,魏延鹏,黄晨光,&Wang, X .(2017).In-situ investigation of dynamic deformation in NiTi shape memory alloys under laser induced shock.MECHANICS OF MATERIALS,114,69-75.
MLA 王曦,et al."In-situ investigation of dynamic deformation in NiTi shape memory alloys under laser induced shock".MECHANICS OF MATERIALS 114(2017):69-75.
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