About this Abstract |
Meeting |
2nd World Congress on High Entropy Alloys (HEA 2021)
|
Symposium
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2nd World Congress on High Entropy Alloys (HEA 2021)
|
Presentation Title |
Effect of Cooling Rate on the Crystallization Temperatures and Lattice Distortion of AlCoCrFeNi MPEA |
Author(s) |
Praveen Sreeramagiri, Ankit Roy, Ganesh Balasubramanian |
On-Site Speaker (Planned) |
Praveen Sreeramagiri |
Abstract Scope |
Crystallographic features and phases formed during synthesis of a high entropy alloy, influence their structural properties significantly. We investigate the effect of cooling rates exerted during the synthesis of AlCoCrFeNi high entropy alloy on the crystallization (and glass formation) using molecular dynamics simulations. An increased cooling rate contributes to a severe under cooling during homogenous nucleation, reducing the crystallization temperatures, while promoting phase transformations. Our results predict the critical cooling rate of this alloy system to be 2.5 × 10^10 K/s, beyond which the melt will solidify into an amorphous solid. In addition, higher cooling rates contribute to an increased lattice distortion during solidification and enhance the structural properties by promoting the formation of deformation twins and increased dislocation densities. |
Proceedings Inclusion? |
Undecided |