The Fatigue Behavior of Laser Weldment in Heterogeneous Materials

이종재료 레이저 용접부의 피로거동

  • 권응관 (경희대 대학원 기계공학과) ;
  • 오택열 (경희대 기계공학과) ;
  • 곽대순 (경희대 대학원 기계공학과) ;
  • 이종재 (수원과학대 금형설계학과)
  • Published : 1997.10.01

Abstract

In this study, Fatigue behavior of laser weldment in heterogeneous materials was investigated. Fatigue strength test and fatigue crack propagation test were performed for specimens with laser weldment in heterogeneous materials, and hardness test was performed. From the fatigue strength test. it was observed that the difference of strength between heterogeneous materials had eflect on crack initiation position and fatigue limit. From the fatigue crack propagation test. it was observed that fatigue behavior of laser weldment in heterogeneous materials is different from that in same materials. The difference of strength between heterogeneous materials and laser weldment had effect on fatigue crack propagation rate.