About this Abstract |
Meeting |
2023 TMS Annual Meeting & Exhibition
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Symposium
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Additive Manufacturing of Metals: Applications of Solidification Fundamentals
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Presentation Title |
In-situ Alloying of High Entropy Alloys by Laser Powder Bed Fusion: Insights from Molecular Dynamics Simulations |
Author(s) |
Yulia Klunnikova, Arne J. Klomp, Karsten Albe, Marie Joëlle Charrier |
On-Site Speaker (Planned) |
Marie Joëlle Charrier |
Abstract Scope |
Conventional additive manufacturing by laser powder bed fusion (LPBF) produces a complete part by successive sintering of layers of pre-alloyed particles. Alternatively, one can also start with a powder blend of single element particles and harness in-situ alloying, which could significantly accelerate processing. Multi-component systems, including high entropy alloys (HEA), are of particular interest due to their good printability with high consolidation and uniform high hardness.
We present results from large scale molecular dynamics and finite difference method simulations of LPBF of the CoCrFeMnNi Cantor HEA. These simulations reveal that the individual elements mix in the melt pool and solidify partially in crystalline and amorphous states. Resulting elemental distributions, microstructures, quantity of crystal defects (stacking faults, twinning, and vacancies) are investigated with an eye on the influence of powder particles size, processing parameters, heat transport, and interdiffusion. |
Proceedings Inclusion? |
Planned: |
Keywords |
Additive Manufacturing, Modeling and Simulation, High-Entropy Alloys |