Proceedings of the Korean Society for Technology of Plasticity Conference (한국소성가공학회:학술대회논문집)
- 2005.05a
- /
- Pages.176-179
- /
- 2005
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
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.
Keywords
- Hypereutectic Al-Si Based Alloy;
- Deformation Behavior;
- Load Relaxation Test;
- Constant Creep Test;
- Internal Variable Theory