A comparative assessment of cyclic deformation behavior of SA333 Gr-6 steel at ambient and elevated temperatures

摘要: The aim of this investigation is to study the comparative cyclic deformation behavior SA333 Gr-6 steel at two different temperatures. Strain-controlled low cycle fatigue experiments were carried out 1 × 10–3 s–1 strain rate room temperature and 300 °C. Cyclic hardening was observed both However, greater 300 °C for all amplitudes. Non-Masing Greater deviation from Masing due generation more dislocation activities. Higher density sub-cell structure formation associated with characteristic material. Lower lives amplitudes in comparison temperature. This deleterious effect dynamic aging, which activated fracture surface reveals that an increase amplitude number crack initiation sites increases region decreases, leads a reduction life.