Proceedings of the Korean Society for Technology of Plasticity Conference (한국소성가공학회:학술대회논문집)

The Korean Society for Technology of Plasticity and materials processing (한국소성∙가공학회)
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Load Relaxation and Creep Transition Behavior of a Spray Cast Hypereutectic Al-Si Based Alloy

분무 주조 과공정 Al-Si계 합금의 응력이완 및 Creep 천이 거동

  • 김민수 (포항공과대학교 신소재 공학과) ;
  • 방원규 (포항산업과학연구원 부품 신소재 연구센터) ;
  • 박우진 (포항산업과학연구원 부품 신소재 연구센터) ;
  • 장영원 (포항공과대학교 신소재 공학과)
  • Published : 2005.05.01
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Abstract

Spray casting of hypereutectic Al-Si based alloy has been reported to provide distinct advantages over ingot metallurgy (IM) or rapid solidification/powder metallurgy (RS/PM) process in terms of microstructure refinement. Hypereutectic Al-Si based alloys have been regarded attractive for automotive and aerospace application, due to high specific strength, good wear resistance, low coefficient of thermal expansion, high thermal stability, and good creep resistance. In this study, hypereutectic Al-25Si-2.0Cu-1.0Mg alloy was prepared by OSPREY spray casting process. High temperature deformation behavior of the hypereutectic Al-Si based alloy has been investigated by applying the internal variable theory proposed by Chang et al. The change of strain rate sensitivity and Creep transition were analyzed by using the load relaxation test and constant creep test.

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