Fig. 17. Manson-Coffin plots for specimens subjected to TMF cycling with dwells and without dwells. The analysis of the fatigue lives in thermomechanical fatigue cycling with dwells indicates that plastic strain amplitude is not the only quantity deciding the fatigue life since time factor plays also an important role. It is expected that still longer dwell times in a cycle would increase fatigue damage further and contribute to the reduction of the fatigue life.