Microstructural investigation of the fatigue behavior and phase transformation in metastable austenitic steels at ambient and lower temperatures
Source abstract
Abstract
Abstract Microstructural investigations of the fatigue behavior and phase transformation in the metastable austenitic steels AISI 304 and 348 were performed. The specimens were cyclically loaded with a constant total-strain-amplitude in the temperature range −60 °C to 25 °C. By means of stress–strain hysteresis and magnetic measurements, the fatigue behavior and phase transformation were characterized. Microstructural changes were evaluated by transmission electron microscopy and by scanning electron microscopy by means of electron backscatter diffraction technique at defined fatigue states. The steels show differences in austenite stability, which lead to significant changes in the deformation induced martensite formation and the fatigue behavior. Dependent on the type of steel and the testing temperature similar α′-martensite fractions but different strengths developed.
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Research context
OpenAlex topics: Microstructure and Mechanical Properties of Steels · Hydrogen embrittlement and corrosion behaviors in metals · Fatigue and fracture mechanics
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
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