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Title:
Microstructure and mechanical properties of an austenite NiTi shape memory alloy treated with laser induced shock
Author: Wang X(王曦); Xia WG(夏伟光); Wu XQ(吴先前); Wei YP(魏延鹏); Huang CG(黄晨光)
Source: MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
Issued Date: 2013-08-20
Volume: 578, Pages:1-5
Abstract: In this study, microstructure and mechanical properties of an austenite NiTi alloy treated with laser shock peening (LSP) was investigated. It was found that the thickness of shock affected layer is about 250-300 μm. The surface hardness of the specimen is increased by approximately 10% after LSP. Laser induced shock introduces slightly residual compressive stress in the peened specimen. The superleastic stress-strain curves of the fully LSP processed NiTi material show no change in phase transition stress, about 100 MPa decrease in martensite yield stress, and a loss of maximum transition strain about 12% after LSP. The ultrahigh-strain-rate plastic deformation by LSP results in dislocation substructure and amorphization underneath the surface which are responsible for the hardness increase and superelastic strain loss.
Keyword: Laser shock peening ; Shape memory alloy ; Plastic deformation ; Amorphization ; Superelasticity
Language: 英语
Indexed Type: SCI ; EI
Corresponding Author: Wang, X (reprint author), Chinese Acad Sci, Inst Mech, Key Lab Mech Fluid Solid Coupling Syst, Beijing 100190, Peoples R China.
Correspondent Email: xiwang@imech.ac.cn
Related URLs: 查看原文
WOS ID: WOS:000321595500001
ISSN: 0921-5093
Rank: [Wang, Xi; Xia, Weiguang; Wu, Xianqian; Wei, Yanpeng; Huang, Chenguang] Chinese Acad Sci, Inst Mech, Key Lab Mech Fluid Solid Coupling Syst, Beijing 100190, Peoples R China
Subject: 固体力学::冲击动力学
Department: LMFS冲击与耦合效应(LHO)
Classification: 一类
Citation statistics:
Content Type: 期刊论文
URI: http://dspace.imech.ac.cn/handle/311007/47438
Appears in Collections:流固耦合系统力学重点实验室(2012-)_期刊论文

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Recommended Citation:
Wang X,Xia WG,Wu XQ,et al. Microstructure and mechanical properties of an austenite NiTi shape memory alloy treated with laser induced shock[J]. MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING,2013-08-20,578:1-5.
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