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Volume 40 Issue 4
Apr.  2014
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Journal of Beijing University of Aeronautics and Astronautics  > 2014  >  40(4): 444-448.
Zhu Ying, Fan Bowen, Guo Wei, et al. Influence of laser shock peening times on microstructure and hardness of TA15 titanium alloy[J]. Journal of Beijing University of Aeronautics and Astronautics, 2014, 40(4): 444-448. doi: 10.13700/j.bh.1001-5965.2013.0305(in Chinese)
Citation: Zhu Ying, Fan Bowen, Guo Wei, et al. Influence of laser shock peening times on microstructure and hardness of TA15 titanium alloy[J]. Journal of Beijing University of Aeronautics and Astronautics, 2014, 40(4): 444-448. doi: 10.13700/j.bh.1001-5965.2013.0305(in Chinese)
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Influence of laser shock peening times on microstructure and hardness of TA15 titanium alloy

doi: 10.13700/j.bh.1001-5965.2013.0305

  • School of Mechanical Engineering and Automation, Beijing University of Aeronautics and Astronautics, Beijing 100191, China

  • Received Date: 29 May 2013
  • Publish Date: 20 Apr 2014
    Abstract
  • Q-switched Nd glass laser with 20 J energy was used to shock TA15 titanium alloy in different times. Results show that laser shock peening (LSP) can produce micro plastic deformation, form dense micro pits and refine the grain size. When the number of impact times increases, the depth of the micro pits increases, but after the impact times is more than twice, the depth of the pits will stop increasing, so the highest impact times is twice in this experiment. Under the impact times of twice, the dislocation density is increasing with the increase of impact times. In the process, the dislocation will pile up, snarl, and proliferate. The hardness of the material increases because of the variation of microstructure above. The surface hardness and the depth of affected layers increase due to the increase of the shock times.

     

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