| About this Abstract |
| Meeting |
2021 TMS Annual Meeting & Exhibition
|
| Symposium
|
High Entropy Alloys IX: Structures and Modeling
|
| Presentation Title |
Grain-scale Plastic Response of Equiatomic CoCrFeMnNi High-entropy Alloy Using High Energy Diffraction Microscopy |
| Author(s) |
Jerard V. Gordon, Rachel Lim, Tony Rollett, Darren Pagan |
| On-Site Speaker (Planned) |
Jerard V. Gordon |
| Abstract Scope |
High-entropy alloys (HEAs) greatly expand the design space for structural materials by enabling almost unlimited compositional tuning. In particular, Cantor-based CoCrFeMnNi alloys and their derivatives have been shown to possess high strength and ductility values exceeding certain stainless steels. However, three-dimensional microstructure-to-property relationships for Cantor-based HEAs are not well understood and preclude significant advances in employing these materials in engineering design. Synchrotron-based High Energy Diffraction Microscopy (HEDM) was used to spatially map lattice orientation and the grain-average elastic strain tensor evolution of a equiatomic high-entropy alloy during in-situ deformation. Interrupted far-field (ff) HEDM scans were taken throughout deformation to capture the elastic regime, elastic-plastic transition, and subsequent plastic flow behavior up to 1% macroscopic strain. Furthermore, interrupted ff-HEDM scans were also performed during cyclic loading experiments at 0.3% and 0.5% strain in order to determine the evolution orientation gradients and Type II residual stress with cycling. |
| Proceedings Inclusion? |
Planned: TMS Journal: Metallurgical and Materials Transactions |
| Keywords |
High-Entropy Alloys, Mechanical Properties, Modeling and Simulation |