|About this Abstract
||2021 TMS Annual Meeting & Exhibition
||Deformation Induced Microstructural Modification
||Grain Boundary Segregation in Nanocrystalline Alloys: Multicomponent, Anisotropy, and Stress Effects
||Malek Alkayyali, Yasir Mahmood, Josh Arrington, Fadi Abdeljawad
|On-Site Speaker (Planned)
The ever-growing demand for advanced structural alloys with optimal properties underpins the need to fundamentally understand the many microstructural features affecting materials performance. Of particular interest is the interaction of elemental species with grain boundaries (GBs), as it greatly influences the thermal stability and mechanical behavior of these systems. In this talk, we will present our recent efforts, employing atomistic simulations and mesoscale models, to investigate the impact of GB solute segregation on GB migration in nanocrystalline (NC) alloys. Several mesoscale phase field studies will be presented highlighting the role of multi-elemental segregation and GB anisotropy effects in grain growth processes in NC alloys. Atomistic simulations of stress-driven migration of pure and doped GBs highlight the paramount role of solute drag in the thermal stability of NC alloys. On the whole, our results reveal a plethora of mesoscale dynamical processes that emerge when multicomponent and anisotropy effects are considered.
||Computational Materials Science & Engineering, Nanotechnology, Mechanical Properties