Journal of the Korean Society for Heat Treatment (열처리공학회지)

The Korean Society for Heat Treatment (한국열처리공학회)
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The Effects of Heat Treatment on the Fatigue Life and Welding Residual Stress of Welded Carbon Steel Plates

탄소강 후판용접부의 피로수명 및 잔류응력에 미치는 열처리 영향

  • An, I.T. (Dept. of Mechanical Engineering, Pusan National University) ;
  • Kim, W.T. (Dept. of Mechanical Engineering, Pusan National University) ;
  • Jo, J.R. (Division of Mechanical Engineering, Korea Maritime University) ;
  • Moon, Y.H. (Dept. of Mechanical Engineering, Pusan National University)
  • 안익태 (부산대학교 정밀기계공학과) ;
  • 김원태 (부산대학교 정밀기계공학과) ;
  • 조종래 (해양대학교 기계공학부) ;
  • 문영훈 (부산대학교 정밀기계공학과)
  • Received : 2003.04.05
  • Published : 2003.05.31
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Abstract

The effects of heat treatment on the fatigue life and welding residual stress of welded plates were investigated in this study. The plates were welded by flux cored arc welding process, and post weld heat treated at $600^{\circ}C$ for 1 hour. The residual stresses of welded plates before and after post weld heat treatment were measured by hole drilling method. To measure the fatigue life of welded plates, low cycle fatigue tests under strain control and high cycle fatigue tests under load control were performed respectively, by using cylindrical specimens containing weld metal and heat affected zone. The obtained result shows that the post weld heat treatment reduces the residual stress, and resultantly changes the fatigue life of welded plate. Goodman diagrammatic analysis has also been performed to study the effect of post weld heat treatment on the high cycle fatigue life.

Keywords

References

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