首页|(163011)Effect of laser shock peening without protective coating on the surface mechanical properties of NiTi alloy

(163011)Effect of laser shock peening without protective coating on the surface mechanical properties of NiTi alloy

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  • NSTL
  • Elsevier
We study the effect of laser shock peening (LSP) without protective coating on the surface mechanical property of NiTi alloy. The Vickers microhardness and wear resistance are measured to determine the mechanical property of NiTi samples treated with different LSP parameters (3 J with 10 ns and 5 J with 20 ns). From the electron backscatter diffraction (EBSD) analysis, it can be found that the laser shock peening does not induce obvious grain refinement in the surface region of NiTi alloy. Both compressive and tensile residual stress in the top layer are determined using the hole drilling method. The results show that the LSP treatment without a protective coating increases the roughness and enhances the surface mechanical properties of NiTi alloy.

Laser shock peeningNiTi alloyMechanical propertyMicrohardnessResidual stressWear resistance

Yuling Chang、Hao Wang、Soren Keller

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Steel Institute, RWTH Aachen University, 52072 Aachen, Germany

Chair of Applied Laser Technologies, Ruhr-Universitat Bochum, UniversitatsstraBe 150, 44801 Bochum, Germany

Institute of Materials Mechanics, Department of Laser Processing and Structural Assessment, Helmholtz-Zentrum Hereon, Max-Planck-Str. 1,21502 Geesthacht, Germany

2022

10.1016/j.jallcom.2021.163011

Journal of Alloys and Compounds

Journal of Alloys and Compounds

EISCI
ISSN：0925-8388
年,卷(期)：2022.896
  • 10
  • 35