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 |
Atomistic Simulations of Deformation Response in High Entropy Alloys |
Author(s) |
Diana Farkas |
On-Site Speaker (Planned) |
Diana Farkas |
Abstract Scope |
This talk reports atomistic simulation studies of mechanical behavior in a model quinary high entropy FCC alloy. The simulations are based on empirical interatomic potentials and use molecular dynamics atomistic techniques to study deformation. Virtual mechanical tests were performed using large-scale simulations and the material response analyzed using various techniques. The focus is on understanding the role that the local composition in the random alloy plays in the deformation mechanisms. It is found that it is most meaningful to compare the alloy deformation response with a corresponding “average atom” material that has the same average properties but no local randomness. The complex high entropy alloy presents a higher strength, and overall less plastic deformation for the same stress level. This is mostly driven by the fact that the dislocations do not glide as easily in the random alloy as they do in the average atom material. |
Proceedings Inclusion? |
Undecided |