Journal of the Korean Society of Manufacturing Technology Engineers (한국생산제조학회지)

The Korean Society of Manufacturing Technology Engineers (한국생산제조학회)
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Improving the Residual Stress Characteristics of the Metal Surface by Nd:YAG Laser Shock Peening

Nd:YAG 레이저 충격 피닝에 의한 금속표면의 잔류응력 특성 개선

  • 양세영 (금오공과대학교 대학원 생산기계공학과) ;
  • 최성대 (금오공과대학교 기계공학부) ;
  • 전재목 (한국폴리텍 VI대학 컴퓨터응용기계과) ;
  • 공병채 (한국폴리텍 IV대학 컴퓨터응용금형과)
  • Received : 2010.05.26
  • Accepted : 2010.08.04
  • Published : 2010.08.15
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Abstract

Laser shock peening is useful to improve fatigue characteristic of multiple number of metals and alloys. This process induces a compressive residual stress on the metal surface, and when tensile load is applied, growth of crack is delayed and which changes the characteristic of the metal surface. It is an innovative surface treatment technique for strengthening metals. Specimens of SM45C are used in this study. The effect of an inertial tamping layer on the residual stress field using laser shock peening setup and Nd:YAG laser power is evaluated. Residual stress distribution measured by X-ray diffraction. As a result of this study it can be presented that following condition of Nd:YAG laser power and inertial tamping layer parameters, compressive residual stress is generated on the surface of the SM45C. Results to experimental data indicate that laser shock peening has great potential as a means of improving the mechanical performance of the metal surface.

Keywords

References

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