Micromechanical modeling of damage and fracture in magnesium alloys

Abstract eng:
Processes of damage and fracture in magnesium alloys are modeled using a micromechanics-based framework. The formulation has two main components (i) a void growth model; and (ii) a criterion for the onset of void/crack coalescence. Application to two magnesium alloys shows that their fracture loci are well predicted using only one fitting parameter. The analysis suggests that the ductile fracture of magnesium alloys involves limited void opening/blunting and is controlled by void coalescence. The results provide the groundwork for understanding the effects of microstructural and loading variables on damage and fracture in these materials.

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