CYCLIC DEFORMATION AND FATIGUE OF SELECTED FERRITIC AND AUSTENITIC STEELS - SPECIFIC ASPECTS

Some recent work on the cyclic deformation and fatigue behaviour of se lected ferritic and austenitic steels is reviewed. The steels consider ed are the ferritic plain carbon steels SAE 1010 and SAE 1045, the mar iensitically or bainitically hardened roller bearing steel SAE 52100 a nd metastable austenitic steels of the type AISI 304 L. The review dea ls with several specific aspects. In particular, experimental data are presented and discussed for the following topics: cyclic deformation (hardening/softening) and its temperature dependence, the cyclic stres s-strain behaviour in single-and multiple-step tests and in the increm ental step lest, the characteristic microstructural changes and disloc ation mechanisms, cyclic plasticity and Masing or non-Masing behaviour , some effects of mean stress, dynamic strain ageing phenomena and the ir effects on fatigue life in stress-and strain-controlled tests and, finally, the enhancement of the monotonic strength and the fatigue res istance of metastable austenitic steels by exploitation of the fatigue -induced martensitic deformation, in particular at low temperatures.