Abstract
Fatigue behavior and phase transformation in the metastable austenitic steels AISI 304, 321 and 348 were investigated in the temperature range from -60°C to 25°C by means of stress-strain hysteresis, electrical resistance and magnetic measurements. The steels show differences in austenite stability, which lead to significant changes in deformation induced martensite formation and fatigue behavior in total strain controlled low cycle fatigue tests. Dependent on the type of steel and testing temperature similar values of martensite fraction but different strengths developed.
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