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Volume 26 Issue 3
Sep.  2013
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Citation:
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Fatigue growth rate of laser shock processed metal sheet

  • 1.

    Beijing Aeronautical Manufacturing Technology Research Institute, Beijing, 100024;

  • 2.

    Beijing University of Aeronautics and Astronautics , Beijing, 100083

  • Received Date: 2001-05-15
    Accepted Date: 2001-09-03
  • Compact tension(CT) specimens of superalloy with thickness of 1.5mm and a high strength steel sheet with thickness of 1.7mm are processed by laser shock,with three spots with diameter of 6mm overlapped along the extension line of precut crack.The fatigue crack growth rates of laser shock processed specimens are compared with those without LSP.The results show that effects of laser shock strengthening have much difference along the crack growth line,the fatigure growth rates can not be fitted by the Paris formula,but laser shock processing can decrease the fatigue crack growth rate in whole distincctly.
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  • [1]

    Peyre P,Fabbro R,Berthe L et al. J Laser Application,1996,8(3):135～141.
    [2]

    Chu J P,Rigsbee J M,Banas G et al. Metallurgical & Materials Transactions A,1995,26(A):1507～1517.
    [3]

    Eisner K,Lang A,Schutte K et al. SPIE,1996,2789:274～280.
    [4]

    Obata M,Sano Y,Mukai N et al. Effect of Laser Peening on Residual Stress and Stress Corrosion Cracking for TYPE 304Stailless Steel. The 7th International Conference on Shot Peening,Institute of Precision Mechanics,Warsaw,Poland,1999:387～394.
    [5] 高镇同主编.疲劳性能试验设计和数据处理.北京:北京航空航天大学出版社,1999.
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Fatigue growth rate of laser shock processed metal sheet

  • 1. Beijing Aeronautical Manufacturing Technology Research Institute, Beijing, 100024;
  • 2. Beijing University of Aeronautics and Astronautics , Beijing, 100083
  • Received Date: 2001-05-15
  • Accepted Date: 2001-09-03
  • Available Online: 2002-05-25

Abstract: Compact tension(CT) specimens of superalloy with thickness of 1.5mm and a high strength steel sheet with thickness of 1.7mm are processed by laser shock,with three spots with diameter of 6mm overlapped along the extension line of precut crack.The fatigue crack growth rates of laser shock processed specimens are compared with those without LSP.The results show that effects of laser shock strengthening have much difference along the crack growth line,the fatigure growth rates can not be fitted by the Paris formula,but laser shock processing can decrease the fatigue crack growth rate in whole distincctly.

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