| About this Abstract |
| Meeting |
2020 TMS Annual Meeting & Exhibition
|
| Symposium
|
Understanding and Predicting Dynamic Behavior of Materials
|
| Presentation Title |
Alloying and Strain Rate Effects on the Deformation Mechanisms of CoCrNi MPEAs |
| Author(s) |
John A. Copley, Francisco Coury, Jonah Klemm-Toole, Yaofeng Guo, Jinling Gao, Kester Clarke, Benjamin Ellyson, Chandler Gus Becker, Brian Milligan, Christopher Finfrock, Niranjan Parab, Kamel Fezzaa, Tao Sun, Wayne Chen, Amy J. Clarke |
| On-Site Speaker (Planned) |
John A. Copley |
| Abstract Scope |
Multi-Principal Element Alloys (MPEAs), which have evolved from studies of High Entropy Alloys (HEAs), are a new and promising class of materials that have potential in structural applications. Some MPEAs, especially those from the CoCrNi family, have shown high toughness, even at cryogenic temperatures. These MPEAs gain their high toughness from deformation mechanisms such as transformation and twinning induced plasticity (TRIP and TWIP, respectively), which increase work hardening and consequently, toughness. Understanding of strain rate effects on toughness-enhancing deformation mechanisms is important for the development of structural materials for use in extreme environments. As the compositional landscape for MPEAs is vast, high-throughput methods for determining the TRIP/TWIP viability of alloys are required. To this end, a series of CoCrNi alloys were prepared and tested across decades of strain rate, including in-situ dynamic testing at the Advanced Photon Source at Argonne National Laboratory, to study the deformation mechanisms exhibited. |
| Proceedings Inclusion? |
Undecided |