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

The Korean Society for Technology of Plasticity and materials processing (한국소성∙가공학회)
권호 표지

Flow Softening Behavior during the High Temperature Deformation of AZ31 Mg alloy

AZ31 Mg 합금의 고온 변형 시의 동적 연화 현상

  • Lee, Byoung-Ho ;
  • Reddy, N.S. ;
  • Yeom, Jong-Teak ;
  • Lee, Chong-Soo
  • 이병호 (포항공과대학교 신소재공학과) ;
  • ;
  • 염종택 (한국기계연구원 소재성형연구센터) ;
  • 이종수 (포항공과대학교 신소재공학과)
  • Published : 2006.05.11
Download PDF
⟨ Previous Next ⟩

Abstract

In the present study, the flow-softening behavior occurring during high temperature deformation of AZ31 Mg alloy was investigated. Flow softening of AZ31 Mg alloy was attributed to (1) thermal softening by deformation heating and (2) microstructural softening by dynamic recrystallization. Artificial neural networks method was used to derive the accurate amounts of thermal softening by deformation heating. A series of mechanical tests (High temperature compression and load relaxation tests) was conducted at various temperatures ($250^{\circ}C{\sim}500^{\circ}C$) and strain rates ($10^{-4}/s{\sim}100/s$) to formulate the recrystallization kinetics and grain size relation. The effect of DRX kinetics on microstructure evolution (fraction of recrystallization) was evaluated by the unified SRX/DRX (static recrystallization/dynamic recrystallization) approaches

Keywords