Please consider attending the following:
MATERIALS ENGINEERING
“Review of dislocation junctions in FCC Metals”
By
Vignesh Vivekanandan
Purdue MSE Ph.D. Preliminary Exam
Advisor: Professor Anter El-Azab
ABSTRACT
Plastic deformation of metals occurs by dislocation motion. The density of dislocations increase during plastic deformation giving rise to hardening. This process is controlled by dislocation-dislocation interaction,
especially the so-called forest cutting and junction formation. In this review, the different types of junctions and their contribution to hardening in FCC metals are discussed. First, the junction formation process is explained based on linear elastic models
of dislocations. Then the shortcomings of such models are discussed and the need for dislocation dynamics simulations is emphasized. Following that, different algorithms used to model and characterize junctions in dislocation dynamics are summarized. Based
on the characterization, different ways of incorporating these effects into dislocation-based crystal plasticity models and continuum dislocation dynamics models are discussed.
Date: Monday, November 26, 2018
Time: 10:30 A.M.
Place: ARMS 1109