|About this Abstract
||2018 TMS Annual Meeting & Exhibition
||Mechanical Behavior at the Nanoscale IV
||Effect of Ag and Zr Solutes on Dislocation Emission from the Σ11(332) Symmetric Tilt Grain Boundary in fcc Cu.
||Valery Borovikov, Mikhail I. Mendelev, Alexander H. King
|On-Site Speaker (Planned)
Addition of immiscible solute atoms is commonly used to stabilize nanocrystalline materials against grain growth. It was argued recently that the solutes with a larger size mismatch are the most effective. Meanwhile, segregating at grain boundaries, solutes can affect the process of dislocation emission under applied stress. Using atomistic simulations, we demonstrate that the solutes with a smaller size mismatch can be more effective in suppressing dislocation emission from grain boundaries. It means that the solutes perfectly suited for the purpose of stabilization of the material against grain growth, may have little or no effect on nucleation of the dislocations from grain boundaries. While, ideally, the goal of solute addition should be at least two-fold: to stabilize the material against grain growth, at the same time effectively suppressing nucleation of the dislocations from grain boundaries.
||Planned: Supplemental Proceedings volume