Investigation of fatigue anisotropy in an extruded magnesium alloy

This work presents an investigation on the fatigue behavior of magnesium AM30 alloy in the extruded and transverse directions. Experimental results from strain-controlled fatigue tests showed that the extruded direction exhibited a lower low-cycle fatigue life but a better high-cycle fatigue life compared to the transverse direction. Differences in the cyclic stress–strain response between the two directions were also observed. Lastly, scanning electron microscopy revealed that fatigue cracks predominantly initiated at cracked intermetallic particles.