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ZHANG Mingyang, ZHU Ying, GUO Wei, HUANG Shuai, HOU Guo. Effects of laser shock processing on fatigue properties of TC17 titanium alloy[J]. LASER TECHNOLOGY, 2017, 41(2): 231-234. DOI: 10.7510/jgjs.issn.1001-3806.2017.02.017
Citation: ZHANG Mingyang, ZHU Ying, GUO Wei, HUANG Shuai, HOU Guo. Effects of laser shock processing on fatigue properties of TC17 titanium alloy[J]. LASER TECHNOLOGY, 2017, 41(2): 231-234. DOI: 10.7510/jgjs.issn.1001-3806.2017.02.017
shu

Effects of laser shock processing on fatigue properties of TC17 titanium alloy

  • 1.

    School of Mechanical Engineering and Automation, Beihang University, Beijing 100191, China

  • 2.

    School of Physics and Nuclear Energy Engineering, Beihang University, Beijing 100191, China

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  • Received Date: February 29, 2016
  • Revised Date: April 10, 2016
  • Published Date: March 24, 2017
    Graphical Abstract
    • Abstract
  • To study the effects of laser shock processing (LSP) on the high-cycle fatigue properties of titanium alloy, TC17 titanium alloy was treated by LSP. The TC17 samples with or without the treatment by LSP were evaluated by high frequency fatigue experiment. The fatigue fracture and microstructures were observed by scanning electron microscope and transmission electron microscope. After two times of LSP treatment by 7J laser energy, the fatigue life of the material under 300MPa increased two times of those of the material without treatment. Compared with the base metal samples, crack source of the strengthened specimen was located in the subsurface layer. The fatigue bands in expansion zone arranged more closely. The results show that, after LSP treatment, high density of dislocations and dislocation tangles are produced in the surface hardening region of samples. The defects can effectively prevent the initiation and extension of fatigue crack and improve the high-cycle fatigue performance of TC17 titanium alloy.
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    • References (15)
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