Abstract:
Magnesium being the lightest structural material, is being increasingly used in automotive industry
but at elevated temperatures, alloys like AZ91D, AM60B, AM50A etc. exhibit poor creep resistance
which hinders the powertrain applications. This article summarizes the various creep deformation
mechanisms prevailing in magnesium alloys at elevated temperatures by the influence of elemental
additions. The main creep mechanisms are found to be dislocation climb, diffusion creep, and grain
boundary sliding. The variation of creep mechanisms for different Mg alloys with respect to the
activation energy (Q), stress exponent (n) for different stresses and temperatures are reported
