About this Abstract |
Meeting |
2020 TMS Annual Meeting & Exhibition
|
Symposium
|
High Entropy Alloys VIII
|
Presentation Title |
J-103: Investigating BCC Refractory Multi-principal Element Alloys by Heaviside Digital Image Correlation |
Author(s) |
Leah H. Mills, Jean-Charles Stinville, Marie-Agathe Charpagne, Valery Valle, Noah R. Philips, Oleg N. Senkov, Tresa M. Pollock |
On-Site Speaker (Planned) |
Leah H. Mills |
Abstract Scope |
Multi-Principal Element (MPE) alloys offer a new approach to design single-phase solid solutions through the addition of multiple elements in high concentrations, thus expanding upon the conventional alloy design space consisting of minor elemental additions to only one or two base elements. Motivated by their potential for extreme high-temperature applications, MPEs composed of refractory elements with high melting-points and body-centered cubic crystal structures exhibit promising mechanical properties compared to the more rigorously studied face-centered cubic MPEs. These refractory MPEs compel the study of underlying dislocation mechanisms in comparison to those observed in conventional BCC alloys. Innovative developments in SEM-DIC provided slip plane and direction analysis by elucidating slip trace geometry, heterogeneity of slip on a grain-to-grain basis and the tendency for plastic localization and transmission. This approach has been deployed for critical comparisons of the slip system behavior between pure Nb and two equiatomic MPEs: MoNbTi and HfNbTaTiZr. |
Proceedings Inclusion? |
Planned: Supplemental Proceedings volume; Planned: Supplemental Proceedings volume |