Abstract
We carried out the fatigue tests on magnesium alloy. Magnesium alloy has the highest specific strength among the structural metals. We investigated the mechanism of the endurance limit of AZ91D magnesium alloy. We examined the effect of the environment and stress condition on the fatigue limit of the alloy. We have recognized the existence of endurance limit in the alloy. We observed the fractography of the alloy. It would be concluded that the fatigue crack initiation played the important role in the S-N curve.
