About this Abstract |
| Meeting |
MS&T25: Materials Science & Technology
|
| Symposium
|
High-Entropy Materials: Solid Solutions, Intermetallics, Ceramics, Functional Materials and Beyond VI
|
| Presentation Title |
Bridging Scales: A Deep Dive into Macroscopically Smooth Plastic Flow in Al-Containing High-Entropy Alloys |
| Author(s) |
Jamieson Brechtl, Rui Feng, Peter K. Liaw, Benoît Beausir, Hafsa Jaber, Tatiana Lebedkina, Mikhail Lebyodkin |
| On-Site Speaker (Planned) |
Jamieson Brechtl |
| Abstract Scope |
High-entropy alloys (HEAs), which are characterized by complex microstructures and chemical disorder, can exhibit dynamically complex dynamic strain aging that may result in intricate dislocation dynamics. However, the interaction and self-organization of dislocations can also be hidden in macroscopically-smooth plastic flow that still has underlying complexity at the mesoscopic-scale. This presentation will summarize some recent findings pertaining to mesoscale-complex plastic flow exhibited by an Al0.3CoCrFeNi HEA. This investigation used a multifaceted approach which combined different experimental methods with complementary nonlinear analyses. The results revealed some important findings on the transition between distinct dynamical regimes. For instance, these transitions may be assimilated with colored noise behavior that seldom occur in complex systems. In summary, the results of this study advance our fundamental understanding of plastic deformation in HEAs. |