About this Abstract |
Meeting |
3rd World Congress on High Entropy Alloys (HEA 2023)
|
Symposium
|
HEA 2023
|
Presentation Title |
Short Range Order and the Evolution of Deformation Mechanisms in the CrCoNi Medium Entropy Alloy |
Author(s) |
Andrew M. Minor |
On-Site Speaker (Planned) |
Andrew M. Minor |
Abstract Scope |
This talk will describe our recent results utilizing electron microscopy and nanomechanical testing techniques to provide insight into multiscale deformation phenomena in the CrCoNi medium entropy alloy. In order to understand the effect of Short Range Order (SRO) in terms of the evolution of plasticity at different stages, the technique of 4D-STEM was used during in situ deformation and fracture experiments. 4D-STEM can provide both real-space imaging and diffraction analysis during in situ testing, making it possible to perform strain mapping via diffraction pattern analysis during in-situ deformation in a TEM. Our results from electron microscopy are then correlated with mechanical testing including nanoindentation to examine how SRO evolves with different processing conditions. Lastly, we will consider the role of both SRO and planar defects in the both the mechanical response as well as structural determination via electron diffraction as a function of heat treatment in the CrCoNi MEA. |
Proceedings Inclusion? |
Planned: Metallurgical and Materials Transactions |