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Open AccessArticle

Scaling Law in Laser-Induced Shock Effects of NiTi Shape Memory Alloy

1
School of Mechanical, Electronic and Control Engineering, Beijing Jiaotong University, Beijing 100044, China
2
The 38th Research Institute of China Electronic Technology Corporation, Hefei 230088, China
3
Key Laboratory for Mechanics in Fluid Solid Coupling Systems, Institute of Mechanics, Chinese Academy of Sciences, Beijing 100190, China
*
Author to whom correspondence should be addressed.
Metals 2018, 8(3), 174; https://doi.org/10.3390/met8030174
Received: 29 January 2018 / Revised: 3 March 2018 / Accepted: 6 March 2018 / Published: 10 March 2018
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Abstract

The shock effects in laser shock processing of NiTi shape memory alloy were studied by dimensional analysis and finite element simulation. The essential dimensionless parameters controlling the residual stress distribution and plastically affected depth were found to be dimensionless pressure duration and peak pressure. By adopting the constitutive model considering the martensitic transformation and plasticity of deformation induced martensite, the influence of dimensionless parameters on the shock effects of shape memory alloy was studied numerically. The numerical results reveal the scaling law of shock effects on those dimensionless parameters quantitatively and the relationship between the plastically affected depth and peak pressure was validated with experimental results. A window of the optimal processing parameters could be obtained based on this study. View Full-Text
Keywords: shape memory alloy; laser shock peening; dimensionless parameters; residual stress; plastically affected depth shape memory alloy; laser shock peening; dimensionless parameters; residual stress; plastically affected depth
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Wang, X.; Xia, W.; Wu, X.; Huang, C. Scaling Law in Laser-Induced Shock Effects of NiTi Shape Memory Alloy. Metals 2018, 8, 174.

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