About this Abstract |
Meeting |
2nd World Congress on High Entropy Alloys (HEA 2021)
|
Symposium
|
2nd World Congress on High Entropy Alloys (HEA 2021)
|
Presentation Title |
High-throughput Approach for Exploration of FCC High Entropy Alloys Based on Deformation Pathways |
Author(s) |
K V Vamsi, Marie-Agathe Charpagne, Tresa M Pollock |
On-Site Speaker (Planned) |
K V Vamsi |
Abstract Scope |
Exploration of novel multicomponent systems has gained interest since the discovery of Cantor alloy and its subsets. It is known that unstable stacking/twin fault energies along with stable stacking faults in the generalized planar/stacking fault energy profiles control the deformation pathways in FCC structures. Estimation of these intrinsic energy barriers for arbitrary compositions is still a challenge experimentally and computationally and there is a need for high-throughput methodologies. In this work, we present a new approach for the exploration, using the FCC ternary Ni-Co-Ru system as a model, based on an operating deformation mechanism. Employing first-principles calculations, the stable stacking fault energies are estimated from a diffuse multi-layer fault model and the unstable fault energies are estimated by a recently found correlation with shear modulus in FCC structures. Deformation mode maps are developed, and regions are classified based on the deformation mode activated. Experimental results validating these predictions are discussed. |
Proceedings Inclusion? |
Undecided |