Effect of loading waveform on high temperature fatigue crack propagation

摘要

The high temperature fatigue crack growth behavior of STS 316L and P92 steel were investigated under the four loading waveforms using CT type specimens. The loading and unloading times for the four waveforms were in the combinations of 1 sec. and 50 sec., which were two symmetrical waveforms and two unsymmetrical waveforms. The behavior was characterized using the AK parameter.