About this Abstract |
| Meeting |
2023 TMS Annual Meeting & Exhibition
|
| Symposium
|
Advances in Multi-Principal Element Alloys II
|
| Presentation Title |
J-77: Transmission Electron Microscopy of Temperature Dependent Deformation Mechanisms in Multi-principal Element Alloys |
| Author(s) |
Madelyn Payne, Mingwei Zhang, Punit Kumar, Mark D Asta, Robert Ritchie, Andrew Minor |
| On-Site Speaker (Planned) |
Madelyn Payne |
| Abstract Scope |
Multi-principal element alloys (MPEAs) have attracted attention from the metallurgy community due to their exceptional properties, often at both high and low temperatures. Transmission electron microscopy (TEM) provides a means to investigate various deformation mechanisms producing remarkable mechanical properties in both face-centered cubic (fcc) and body-centered cubic (bcc) MPEA systems. High-resolution TEM and four-dimensional scanning electron microscopy (4D-STEM) analysis reveal an extended sequence of deformation mechanisms that produce exceptional fracture toughness. Spatially-resolved structural information from 4D-STEM datasets uncover how stacking faults, hcp laths, and nanotwins operate synergistically to prolong strain-hardening. Here we report both ex situ and in situ TEM observations of deformation mechanisms in both fcc MPEAs and bcc refractory MPEAs across a wide range of temperatures. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
High-Entropy Alloys, Mechanical Properties, |