Martensite in die-cast magnesium alloy?

Abstract: In this paper, the microstructures of a thin-wall die-cast commercial magnesium (Mg) alloy, aged at 200°C for various times, were investigated using transmission electron microscopy. A martensite-like phase was observed. The crystal lattice parameters of this phase are a =0.30948nm, c =0.50498nm, and axial ratio c/a =1.6314. Orientation relationship of the martensite-like phase and the parent has been determined as , and or . The driving force of the possible martensitic transformation (MT) might came from the residual microstructure stresses left during die-cast process. [Copyright &y& Elsevier]