Effects of extrusion ratio on the ratcheting behavior of extruded AZ31B magnesium alloy under asymmetrical uniaxial cyclic loading

▶ A cyclic softening was followed by a cyclic hardening, and finally a stable state. ▶ Extrusion ratio did not affect the cyclic softening/hardening behavior. ▶ The values of ratcheting strain decreased with extrusion ratio. ▶ Extrusion ratio affected the final ratcheting strain variation with stress amplitude.