|About this Abstract
||2020 TMS Annual Meeting & Exhibition
||High Entropy Alloys VIII
||Atomistic Simulations of Dislocations and Deformation in FCC Ni-based Binary Concentrated Alloys
||Haixuan Xu, Liubin Xu, Jaswanth Bommidi
|On-Site Speaker (Planned)
The emergence of concentrated alloys, such as medium/high entropy alloys, has attracted tremendous research interest, and also posted challenges to traditional solid-solution strengthening theory. To extend the theory, we carried out atomistic simulations to determine the Peierls stress across a wide compositional range in the selected Ni-based binary concentrated alloys. The Peierls stress is found to be influenced by local chemical environments, and the compositional dependence deviates from either strong or weak interaction models. Moreover, we performed nanoindentation simulations to understand the effects of alloy compositions on deformation behavior. The dislocation evolution during the atomistic nanoindentation simulations is examined. The proportion of different types of dislocations generated is associated with the stacking fault energies (SFEs) of the alloys, which may provide insights in understanding the strengthening of these alloys.
||Planned: Supplemental Proceedings volume; Planned: Supplemental Proceedings volume