The Effect of Hot Tearing in Semi Solid Casting of Aluminum A201 Alloy

Abstract

The effects of rheocasting times on the hot tearing defect in semi-solid die casting of aluminum A201 alloy have been investigated. This study found that no hot cracking formed in the semi-solid A201 alloy parts at a rheocasting time of 10 seconds, implying that the hot tearing suscepability (HTS) index value is zero. Moreover, the HTS index values for all semi-solid casting conditions were lower than those found in conventional casting samples. The microstructure of the as semi-solid casting parts consisting of non-dendritic structures and smaller grain size helped to improve the hot tearing resistance of aluminum A201 alloy. These results support the feasibility of semi-solid die casting of aluminum A201 alloy by using Gas Induced Semi-Solid (GISS) technique.