|About this Abstract
||2020 TMS Annual Meeting & Exhibition
||High Entropy Alloys VIII
||J-48: Low Cycle Fatigue Behavior and Cyclic Plastic Response of Equiatomic CrCoNi Medium-entropy Alloy with Partially and Fully Recrystallized Microstructures
||Milan Heczko, Connor E Slone, Veronika Mazanova, Ivo Kubena, Easo P. George, Tomas Kruml, Jaroslav Polak, Michael J. Mills
|On-Site Speaker (Planned)
Equiatomic CrCoNi medium-entropy alloy was cold-rolled and heat-treated to produce partially and fully recrystallized microstructures. Alloys with these two different microstructural states were subjected to total strain controlled low cycle fatigue tests at room temperature over a wide range of strain amplitudes. Fatigue hardening/softening curves, cyclic stress-strain curves and fatigue life curves were evaluated. Simultaneously, the hysteresis loops during cyclic loading were analyzed using a generalized statistical theory. The probability density distribution function of the internal critical stresses, the effective saturated stress, and their evolution during cycling were derived for various strain amplitudes. The internal structure and the surface relief were studied and correlated with the cyclic response and the evolution of the probability density function of the internal critical stresses. The effect of partially and fully recrystallized microstructures on the low cycle fatigue behavior of the equiatomic CrCoNi medium-entropy alloy is also discussed.
||Planned: Supplemental Proceedings volume; Planned: Supplemental Proceedings volume