About this Abstract |
Meeting |
2020 TMS Annual Meeting & Exhibition
|
Symposium
|
High Entropy Alloys VIII
|
Presentation Title |
Integrating Theory and Experiment in the Design of Multiprincipal Element Alloys |
Author(s) |
Mu Li, Zhaohan Zhang, Arashdeep Thind, Rohan Mishra, Katharine M. Flores |
On-Site Speaker (Planned) |
Katharine M. Flores |
Abstract Scope |
Multiprincipal element alloys (MPEAs) have garnered significant interest as potential next-generation structural materials due to their unique lack of a dominant solvent species and the resulting potential for deviations from conventional structure-property models. In this work, we apply high-throughput alloy synthesis and screening methods to rapidly identify potential MPEA compositions of interest, and use density functional theory (DFT) calculations to gain a better understanding of the origin and stability of the observed structures. In one model refractory system, NbTixVZr, we observe that the microstructure of the ternary alloy (x = 0) consists of a BCC solid solution and hexagonal (C14) and cubic (C15) Laves phases. The addition of Ti destabilizes the Laves phases, resulting in a single BCC solid solution in the quaternary alloy. Micromechanical and STEM measurements are used to examine deformation mechanisms, particularly the role of stacking faults observed in the Laves phases. Implications for the selection of additional alloying elements will be discussed. |
Proceedings Inclusion? |
Planned: Supplemental Proceedings volume; Planned: Supplemental Proceedings volume |