About this Abstract |
Meeting |
2nd World Congress on High Entropy Alloys (HEA 2021)
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Symposium
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2nd World Congress on High Entropy Alloys (HEA 2021)
|
Presentation Title |
Atomistic Simulations of the Local Slip Resistances in Four Refractory Multi-principal Element Alloys |
Author(s) |
Rebecca Alexandra Romero, Shuozhi Xu, Wurong Jian, Irene Beyerlein, Chintalapalle V Ramana |
On-Site Speaker (Planned) |
Rebecca Alexandra Romero |
Abstract Scope |
Multi-principal element alloys (MPEAs) are alloys containing three or more principal elements on simple underlying lattices. They have intermediate structural and chemical complexities between single-element regular metals and multi-element disordered metallic glasses. The combination of refractory metals with oxidation resistance enhancing elements make them ideal candidates for high temperature applications. Due to their unique microstructures and chemical compositions, MPEAs exhibit excellent mechanical properties at elevated temperatures. Improving the mechanical properties of MPEAs requires knowledge of plastic deformation mechanisms, the core of which is dislocation slip. In metals, dislocation slip is intimately connected to the generalized stacking fault energies (GSFEs) and local slip resistances (LSRs). In this work, we conduct atomistic calculations to obtain GSFEs and LSRs on three slip planes – {110}, {112}, and {123} – in four refractory MPEAs. The four MPEAs have differing values of GSFE and LSR, and plastic anisotropy. The origin of these differences is discussed. |
Proceedings Inclusion? |
Undecided |