pISSN : 1598-706X / eISSN : 2288-8381
한국주조공학회지 (32권2호 75-80)
Microstructure Evolution of Semi Solid AZ31+(Ca) Magnesium Alloys during Reheating Process
Ca첨가 반응고 AZ31 마그네슘 합금의 재가열에 따른 미세조직 변화
Hee-Kyung Kim, Bong-Hak Seong, Guen-Ho Van, Dae-Hwan Kim, Yeong-Rok Seong*, Su-Gun Lim
Gyeongsang National University, *HEESUNG PRECISION
In this study, we are aimed to prevent grain growth of semi-solid AZ31 magnesium alloys during reheating process. The semi-solid AZ31+(Ca) billets were investigated by using metallographic analysis, X-ray diffraction, scanning electron microscopy and energy dispersive spectroscopy in order to elucidate the effect of Ca addition during reheating process. The grain growth of semi-solid AZ31+(Ca) billet was reduced with increasing Ca content during reheating. The grain size of AZ31+ (Ca) billet decreased with increasing volume fraction of Al2Ca particles. The grain growth rate constant K calculated by Oswald ripening LSW theory in AZ31+1.5wt.% Ca billet was the lowest 129.
AZ31 Mg alloy, Cooling plate, Semi-solid metal, Reheating, Microstructure.
PDF