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Microstructure and mechanical properties of an austenite NiTi shape memory alloy treated with 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), Chinese Acad Sci, Inst Mech, Key Lab Mech Fluid Solid Coupling Syst, Beijing 100190, Peoples R China.
2013-08-20
发表期刊MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
卷号578页码:1-5
ISSN0921-5093
摘要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.
关键词Laser Shock Peening Shape Memory Alloy Plastic Deformation Amorphization Superelasticity
学科领域冲击动力学
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收录类别SCI ; EI
语种英语
WOS记录号WOS:000321595500001
项目资助者National Natural Science Foundation of China [11002150, 10972228]; Basic Research Equipment Project of Chinese Academy of Sciences [YZ200930]
课题组名称LMFS冲击与耦合效应(LHO)
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文献类型期刊论文
条目标识符http://dspace.imech.ac.cn/handle/311007/47438
专题流固耦合系统力学重点实验室
通讯作者Wang, X (reprint author), Chinese Acad Sci, Inst Mech, Key Lab Mech Fluid Solid Coupling Syst, Beijing 100190, Peoples R China.
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GB/T 7714
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,2013,578:1-5.
APA Wang X,Xia WG,Wu XQ,Wei YP,Huang CG,&Wang, X .(2013).Microstructure and mechanical properties of an austenite NiTi shape memory alloy treated with laser induced shock.MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING,578,1-5.
MLA Wang X,et al."Microstructure and mechanical properties of an austenite NiTi shape memory alloy treated with laser induced shock".MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING 578(2013):1-5.
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