About this Abstract |
Meeting |
MS&T21: Materials Science & Technology
|
Symposium
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High Entropy Materials: Concentrated Solid Solutions, Intermetallics, Ceramics, Functional Materials and Beyond II
|
Presentation Title |
Deformation of Refractory Multi-principal Element Alloy Nanowires |
Author(s) |
Shuozhi Xu, Yanqing Su |
On-Site Speaker (Planned) |
Shuozhi Xu |
Abstract Scope |
Multi-principal element alloys (MPEAs) are alloys that form solid solution phases and consist of three or more principal metallic elements. They are considered to have intermediate structural and chemical complexities between single-element regular metals and multi-element disordered metallic glasses. Due to their unique microstructures and chemical compositions, MPEAs exhibit excellent mechanical properties such as high strength at elevated temperatures and excellent ductility at low temperatures. Among all MPEAs, refractory MPEAs mainly consist of refractory metals, and some of them can retain reasonably high strengths at 1600 oC. Here, atomistic simulations are performed to study the tensile and compressive loadings of a series of refractory MPEA nanowires. The MPEAs considered in this work include ternaries, quaternaries, and quinaries, differing in chemical compositions. Results demonstrate the relation between the strengthening and lattice distortion of MPEAs. The origin of this relationship is discussed. |