High Strain and Microstructure Transforming in Laser Peening Ti-6Al-4V

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  • SHIKUN Zou
    College of Mechanical Science and Engineering, Huazhong University of Science and Technology Beijing Aeronautical Manufacturing Technology Research Institute
  • SHUILI Gong
    College of Mechanical Science and Engineering, Huazhong University of Science and Technology Beijing Aeronautical Manufacturing Technology Research Institute
  • ENMING Guo
    College of Mechanical Science and Engineering, Huazhong University of Science and Technology

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Abstract

In order to analyze high strain produced by laser peening during tens of ns, which can’t be performed in so short process, the surface profi le of after laser peening with square spots was compared with that with circle spots, steep sidestep showed high stain and deformation produced in laser peening with square spot. The microstructure transforming in laser peening titanium alloy Ti-6Al-4V in the center of shocked zone and at the edge of square spot was researched in this paper. The results showed that nanometers size crystals were formed at the edge of square spots because of the shearing strain produced during laser peening of titanium alloy Ti-6Al-4V.

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