Fig. 5.

Experimentally measured results (symbols) of plastic strain amplitude ($\mathrm{\Delta }{\mathit{\epsilon }}_{\mathbf{p}\mathbf{l}}/2$) against fatigue cycle to failure (N_f) for the Al6XN stainless steel, showing a deviation from the classical Coffin−Manson rule (i.e., a single linear curve in a double logarithmic plot). The solid lines are the fitting curves.