Host: The Japan Society of Mechanical Engineers
Name : [in Japanese]
Date : October 08, 2016 - October 10, 2016
The effect of initial loading direction on fatigue life of AZ 31 magnesium alloy plate was investigated. Axial fatigue test at high stress amplitude were performed at room temperature. We recorded stress-strain hysteresis loops to investigate the cyclic deformation behavior. There were noticeable changes in N-S curves at stress amplitude of 90 MPa and 100 MPa, fatigue lives of initial loading from tension were longer than that of initial loading from compression. On the other hand, at stress amplitude of 110 MPa fatigue life of initial loading from compression was shorter than the initial loading form tension. As the maximum tensile strain at the first cycle became larger, the fatigue life became longer at the same stress amplitude.
