A Dislocation Density Based Constitutive Model for Cyclic Deformation

[+] Author and Article Information
Y. Estrin, H. Braasch

Department of Mechanical and Materials Engineering, University of Western Australia, Nedlands WA 6907, Australia

Y. Brechet

Laboratoire de Thermodynamique et Physico-Chimie Metallurgiques, Institut National Polytechnique de Grenoble, B.P. 75, 38402 Saint Martin d’Heres Cedex, France

J. Eng. Mater. Technol 118(4), 441-447 (Oct 01, 1996) (7 pages) doi:10.1115/1.2805940 History: Received June 25, 1995; Revised February 01, 1996; Online November 27, 2007


A new constitutive model describing material response to cyclic loading is presented. The model includes dislocation densities as internal variables characterizing the microstructural state of the material. In the formulation of the constitutive equations, the dislocation density evolution resulting from interactions between dislocations in channel-like dislocation patterns is considered. The capabilities of the model are demonstrated for INCONEL 738 LC and Alloy 800H.

Copyright © 1996 by The American Society of Mechanical Engineers
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