About this Abstract |
| Meeting |
2026 TMS Annual Meeting & Exhibition
|
| Symposium
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Fatigue in Materials: Fundamentals, Multiscale Characterizations and Computational Modeling
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| Presentation Title |
Fatigue Properties of CrCoNi-Based Multi-Principal Element Alloys – The Effects of Additively Manufactured (L-PBF) Microstructure |
| Author(s) |
Milan Heczko, Timothy M Smith, Andreas Bezold, Dhruv Anjaria, Eva Zabloudilová, Ivo Kuběna, Jaroslav Polák, Jean-Charles Stinville, Michael J Mills |
| On-Site Speaker (Planned) |
Milan Heczko |
| Abstract Scope |
Multi-principal-element alloys based on CrCoNi system are topic of significant interest thanks to their outstanding properties as well as the success of 3D printed NASA GRX-810 alloy (Nature, 2023). Recently, it was also reported that CrCoNi belongs to the class of materials exhibiting a new phenomenon of dynamic plastic deformation delocalization, which is suggested to greatly enhance fatigue strength. However, further utilization of these materials in real applications is currently limited by knowledge gaps in the understanding of their fundamental fatigue behavior. In this work CrCoNi-based alloys were subjected to strain-controlled low cycle fatigue tests. Fatigue hardening/softening curves, cyclic stress-strain and fatigue life curves were evaluated. The deformation substructure was analyzed by multi-scale electron microscopy and correlated with the cyclic response. Fatigue performance of the alloys in both as-cast and 3D printed condition were compared and discussed in relation to other structural alloys used in real service conditions. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Additive Manufacturing, High-Entropy Alloys, Mechanical Properties |