Abstract
AbstractUniaxial and multiaxial fatigue characteristics of as‐extruded and extruded‐then‐forged ZK60 magnesium alloys were examined to understand the influence of low‐temperature forging on its deformation mechanics. Upon forging, basal texture weakening and grain refinement occurred in ZK60 extrusion. Based on uniaxial results, forging process led to improvements in quasi‐static tensile strength and axial cyclic response in high‐cycle fatigue regime, whereas shear responses remained unaffected. Biaxial non‐proportional tests demonstrated that changing phase angle shift between axial and torsional waveforms had no effect on cyclic axial response, contrary to the shear response. Lastly, critical‐plane and energy‐based life prediction models were assessed.
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