Computer Simulation of Plastic Deformation Through Planar Glide in an Idealized Crystal

[+] Author and Article Information
S. Altintas, K. Hanson, J. W. Morris

Inorganic Materials Research Division, Lawrence Berkeley Laboratory and Department of Materials Science and Engineering, College of Engineering, Berkeley, Calif.

J. Eng. Mater. Technol 98(1), 86-91 (Jan 01, 1976) (6 pages) doi:10.1115/1.3443341 History: Received November 04, 1974; Revised March 12, 1975; Online August 17, 2010


In this paper we report the behavior of the plastic deformation of an idealized crystal made by stacking parallel slip planes. Each slip plane is assumed to contain active sources of dislocations leading to a constant density of non-interacting dislocations in the plane which glide through randomly distributed localized point obstacles, representing small precipitates. The dislocation is assumed to have a constant line tension and the dislocation-obstacle interaction is taken to have a simple step form. Using results of computer simulation of thermally activated glide through random arrays of point obstacles we modeled deformation as a function of temperature and applied stress, determining the strain rate and the morphological characteristics of slip.

Copyright © 1976 by ASME
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