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Meeting 2017 TMS Annual Meeting & Exhibition
Symposium The John Cahn Memorial Symposium
Presentation Title A DSC Model for Grain Boundary Migration and Properties
Author(s) David J Srolovitz, Jian Han, Spencer Louis Thomas, Vaclav Vitek
On-Site Speaker (Planned) David J Srolovitz
Abstract Scope John Cahn and co-workers developed a predictive model for the coupling between stress and grain boundary (GB) migration that has since been validated by both atomistic simulation and experiment. In this presentation, we propose a generalization of this approach based on DSC disconnections. We demonstrate that the Cahn results represent a special case of the more general model. In particular, we will show how GB migration is coupled to a range of different driving forces, how GB migration can generate stress, and how these stresses can lead to switching between different GB migration mechanisms. The importance of these effects will be demonstrated by molecular dynamics simulation of the motion of individual GBs and within a polycrystal. We will then demonstrate the coupling between GB structure and the interactions between GB and plasticity (i.e., grain boundaries as barriers to dislocation motion and as sites for dislocation absorption, emission, and transmission). We briefly discuss how inclusion of thermal effects on GB structure can be related to GB roughening and GB sliding within the same model.
Proceedings Inclusion? Undecided

OTHER PAPERS PLANNED FOR THIS SYMPOSIUM

A DSC Model for Grain Boundary Migration and Properties
Beyond the Gorsky Effect – Exploring Larché-Cahn Open System Elasticity in Experiment
Dislocations, Trijunctions and Grain Rotation
Energetic Trends for Twin Boundaries in HCP Metals
Experimental Measures of Stress-coupled Boundary Migration and the Attendant Mechanical Behavior of Nanocrystalline Films
How Some Quasicrystals Might Grow
John Cahn's Boss, Really?
John Cahn and Aesthetics of Materials
Molecular Dynamics Simulations of Faceted, Incoherent Twin Boundaries
Phase Transition and Anomalous Diffusion in Metastable β Ti-Mo
Quasi-history of Quasi-crystallinity
Thin Film Grain Growth for Twin Related Orientations of Grains

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