About this Abstract |
Meeting |
2022 TMS Annual Meeting & Exhibition
|
Symposium
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Advances in Multi-Principal Elements Alloys X: Structures and Modeling
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Presentation Title |
Simulations of Deformation and Fracture in Multi-principal Element Alloys |
Author(s) |
Diana Farkas |
On-Site Speaker (Planned) |
Diana Farkas |
Abstract Scope |
This talk reports multi-scale studies of deformation and fracture response in a model equi-atomic quinary high entropy FCC alloy. The simulations are based on molecular dynamics techniques at the atomistic level to study the deformation mechanisms and bridging with continuum fracture mechanics. The atomistic part is based on empirical interatomic potentials to study plasticity response for increasingly higher applied stresses. Deformation and fracture response are analyzed focusing on the role that the local composition in the random alloy plays in the deformation mechanisms. For this purpose, comparative simulations are performed with a corresponding “average atom” material that has the same average properties as the complex alloy but no local randomness. The complex high entropy alloy is both higher and has higher fracture resistance than the average atom material. These effects are analyzed in terms of dislocation nucleation and propagation mechanisms. |
Proceedings Inclusion? |
Planned: TMS Journal: Metallurgical and Materials Transactions |
Keywords |
Computational Materials Science & Engineering, High-Entropy Alloys, Mechanical Properties |