Analysis of creep rupture life of Mg–Al–Mn alloy produced by die-casting

Creep rupture tests were performed for a die-cast Mg–Al–Mn alloy, AM50, at temperatures between 423 and 498 K under stresses between 30 and 120 MPa, and the creep rupture lives were evaluated by using the Larson-Miller parameter (LMP). The value of LMP is uniquely described by the logarithm of the applied stress for the alloy, when the Larson-Miller constant is chosen as fifteen rather than twenty. The Larson-Miller constant depends predominantly on the morphology of intermetallic phases in microstructure for magnesium alloys.