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Spatio-Temporal Evolution of Dislocation Patterns in Fatigued Metals: Fundamental Limitations Imposed by Grain Size

Published online by Cambridge University Press:  15 February 2011

Michael V. Glazov  and
Campbell Laird
Michael V. Glazov
Affiliation:
Department of Materials Science and Engineering, LRSM, The University of Pennsylvania,Philadelphia, PA 19104
Campbell Laird
Affiliation:
Department of Materials Science and Engineering, LRSM, The University of Pennsylvania,Philadelphia, PA 19104
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Abstract

An attempt to employ the self-organization theory has been made in order to describe different types of dislocation patterning in fatigued metals. We demonstrate that the formation of certain patterns can be understood as a result of competition between the intrinsic length scales of the “reaction+diffusion” model, on the one hand, and grain size, L on the other hand. Our results indicate that a critical grain size, Lcr, exists such that below Lcr the formation of dislocation structures of any type in fatigued metals becomes impossible.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 362: Symposium J – Grain-Size and Mechanical Properties--Fundamentals and Applications , 1994 , 79
Copyright
Copyright © Materials Research Society 1995

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