An experimental study of fatigue crack propagation in extruded AZ31B magnesium alloy

Mode I fatigue crack growth (FCG) experiments were carried out using extruded AZ31B magnesium alloy in ambient air. The cracks in the experiments using compact tension (CT) specimens were oriented in three different directions with respect to the extrusion direction. With constant load amplitude, the experiments were conducted with three load ratios (minimum load over maximum load in a loading cycle): 0.1, 0.5 and 0.75. The experimental results...