Fatigue characteristics of rolled Mg-3Al-1Zn (AZ31) alloy were investigated by performing the low-cycle fatigue test along the rolling direction. The alloy was found to have a strong basal texture so that the fatigue deformation was predominated by the alternation of twinning and detwinning during each cycle, and this made the cyclic stress response unstable and introduced a non-zero mean stress and/or strain depending on the loading condition. An energy-based concept was successfully used to predict the low-cycle fatigue life because a plastic strain energy density was found to have good characteristics as a fatigue parameter; it was stabilized at the early stage of fatigue life and nearly invariant through entire life. In the life prediction model, the effect of mean stress was appropriately considered. © 2010 Elsevier Ltd. All rights reserved.
Hyuk Park, S., Hong, S. G., Ho Lee, B., Bang, W., & Soo Lee, C. (2010). Low-cycle fatigue characteristics of rolled Mg-3Al-1Zn alloy. International Journal of Fatigue, 32(11), 1835–1842. https://doi.org/10.1016/j.ijfatigue.2010.05.002