Journal of the Korean Society for Heat Treatment (열처리공학회지)

The Korean Society for Heat Treatment (한국열처리공학회)
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Changes of Low Cycle Fatigue Behavior of AI-Mg-Si Alloy with Severe Plastic Deformation and Heat Treatment

강소성 가공 및 열처리에 의한 Al-Mg-Si합금의 저주기 피로특성변화

  • Kim, W.H. (Department of Materials Science and Engineering, Korea University) ;
  • Kwun, S.I. (Department of Materials Science and Engineering, Korea University)
  • 김원회 (고려대학교 신소재공학과) ;
  • 권숙인 (고려대학교 신소재공학과)
  • Published : 2009.07.30
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Abstract

The effects of severe plastic deformation by equal channel angular pressing (ECAP) and subsequent heat treatment on the low cycle fatigue behaviors of Al-Mg-Si alloy were investigated. The specimens which were peak aged at $175^{\circ}C$ after solution treatment showed cyclic hardening at all strain amplitudes, while the specimens ECAPed after solution treatment showed cyclic softening at all strain amplitudes during fatigue. The specimens aged at $100^{\circ}C$ after ECAP showed slight cyclic hardening. Various changes of cyclic fatigue behavior after severe plastic deformation and/or heat treatment were discussed in terms of the microstructural changes and precipitation conditions.

Keywords

References

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