In situ observation of tensile deformation of high-pressure die-cast specimens of AM50 alloy

In situ observation of HPDC AM50 alloy in the SEM chamber was performed to study the changes of the micro-voids and the beta phase during tensile deformation. The results suggested that micro-voids had little change in the elastic region, opened linearly with increasing load in the plastic region and led to final fracture. The detachment of beta phase from the interface was also observed in the plastic region and there was no evidence to suggest that the detachment led to the final fracture. (C) 2009 Elsevier B.V. All rights reserved.