Effect of strain rate induced M23C6 distribution on cyclic deformation behavior: Cyclic hardening model

Cyclic deformation mechanism of Sanicro 25 alloy was investigated under different strain rates (ε˙) at 700 °C. When ε˙ increased, the maximum stress amplitude σa decreased and the fatigue life Nf increased. The saturated hysteresis energy ΔWp first decreased and then increased with increasing ε˙. It is attributed to the variation of stress amplitude, which is related to the interaction of precipitates and dislocations. HAADF STEM analysis shows...