| About this Abstract |
| Meeting |
2021 TMS Annual Meeting & Exhibition
|
| Symposium
|
High Entropy Alloys IX: Alloy Development and Properties
|
| Presentation Title |
Low Cycle Fatigue Behavior and Cyclic Plastic Response of Equiatomic CrCoNi Medium-entropy Alloy |
| Author(s) |
Milan Heczko, Veronika Mazanova, Connor E Slone, Ivo Kubena, Jiri Tobias, Tomas Kruml, Easo P. George, Maryam Ghazisaeidi, Jaroslav Polak, Michael J Mills |
| On-Site Speaker (Planned) |
Milan Heczko |
| Abstract Scope |
Equiatomic CrCoNi alloy was subjected to strain-controlled low cycle fatigue tests at room temperature in a wide interval of strain amplitudes. Fatigue hardening/softening curves, cyclic stress-strain curves and fatigue life curves were evaluated. The evolution of the internal critical stresses and the effective saturated stress during cyclic loading was analyzed using a generalized statistical theory of the hysteresis loop model. The deformation substructure was studied by atomic resolution electron microscopy and correlated with the cyclic response. Correlation of mechanical test data, modeling and characterization reveals details of the deformation mechanisms such as highly planar slip, deformation twinning and FCC-HCP transformation, which govern cyclic strength, cyclic plastic response and the fatigue life. Performance of the CrCoNi alloy, which is characterized by good cyclic strength combined with superior resistance to cyclic plastic deformation, is compared and discussed in relation to other structural alloys used in real service conditions. |
| Proceedings Inclusion? |
Planned: |