Nonequilibrium Interface Dynamics:
Fundamental Physical Issues in Nonequilibrium Interface Dynamics

CSIC Building (#406), Seminar Room 4122.
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Dislocation Dynamics

Dr. David Srolovitz

Princeton Material Institute at Princeton University

Abstract:   Plastic deformation in most crystalline systems is carried by line defects, known as dislocations. The mechanisms by which dislocations move and how they interact with microstructural constituents determines the nature of the mechanical response of such materials. I will present the results of a study of dislocation motion within the framework of a kinetic Monte Carlo model that focuses on the mechanisms of dislocation motion in pure and impure metals. The final result is a dislocation force-velocity relation. The second half of the talk presents results of a level-set calculation of dislocation motion in the presence of a particle dispersion. In this study, we focus on the wide range and often surprising mechanisms by which dislocations by-pass particles.