| About this Abstract |
| Meeting |
2023 TMS Annual Meeting & Exhibition
|
| Symposium
|
Advances in Multi-Principal Element Alloys II
|
| Presentation Title |
Uncovering Unique Multi-Principal Element Alloy Properties Using Atom Probe Tomography |
| Author(s) |
Jonathan Poplawsky, Ying Yang, Xing Wang, Rui Feng |
| On-Site Speaker (Planned) |
Jonathan Poplawsky |
| Abstract Scope |
Multi-principal element alloys (MPEAs) have become increasingly popular because of improvements in mechanical properties and radiation resistance compared to traditional alloys, which is due to unique microstructures, lattice modification, etc. The microstructures and material properties can be tweaked by the alloy composition, fabrication route (i.e. additive manufacturing, casting, etc.), and processing conditions. For example, an Fe-Ni-Al-Ti medium entropy alloy (MEA) has exceptional strength, work hardening, and ductility due to a unique L12 precipitate structure and matrix composition that allows for austenite retention during quenching that transforms into martensite during plastic deformation. Atom probe tomography (APT) was vital for determining the necessary precipitate sizes and matrix composition needed for this unique physical property. The importance of APT data for the development and characterization of MPEAs will be highlighted with this example along with others. APT was conducted at ORNL's CNMS, which is a U.S. DOE Office of Science User Facility. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
High-Entropy Alloys, Characterization, |