2D dislocation dynamics in thin metal layers Conference Paper uri icon

abstract

  • The paper deals with a discrete dislocation dynamics study of plastic deformation in a thin film caused by thermal mismatch with its substrate. A unit analysis is carried out, with dislocations in the film being represented by line singularities in an isotopic linear elastic medium. Their mutual interactions as well as the interactions with the interface and the free surface are accounted for by means of a coupled dislocation dynamics-finite elements technique. The formation includes a set of constitutive rules to model generation, glide, annihilation and pinning of dislocations at point obstacles. The simulation tracks the evolution of the dislocation structure as thermal stress builds up as well as during relaxation under constant temperature, leading to dense dislocation distributions near the interface and a dislocation-free zone along the strees-free surface of the film. © 2001 Elsevier Science B.V. All rights reserved.

published proceedings

  • Materials Science and Engineering: A

author list (cited authors)

  • Nicola, L., Van der Giessen, E., & Needleman, A

citation count

  • 20

complete list of authors

  • Nicola, L||Van der Giessen, E||Needleman, A

publication date

  • July 2001