Title:
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Statistical dynamics of dislocation systems: The influence of dislocation-dislocation correlations.
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Author:
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Zaiser, Michael; Miguel López, María del Carmen; Groma, I.
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Other authors:
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Universitat de Barcelona |
Abstract:
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During plastic deformation of crystalline materials, the collective dynamics of interacting dislocations gives rise to various patterning phenomena. A crucial and still open question is whether the long range dislocation-dislocation interactions which do not have an intrinsic range can lead to spatial patterns which may exhibit well-defined characteristic scales. It is demonstrated for a general model of two-dimensional dislocation systems that spontaneously emerging dislocation pair correlations introduce a length scale which is proportional to the mean dislocation spacing. General properties of the pair correlation functions are derived, and explicit calculations are performed for a simple special case, viz pair correlations in single-glide dislocation dynamics. It is shown that in this case the dislocation system exhibits a patterning instability leading to the formation of walls normal to the glide plane. The results are discussed in terms of their general implications for dislocation patterning. |
Subject(s):
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-Dislocacions en cristalls -Física estadística -Matèria condensada -Termodinàmica -Plasticitat -Dislocations in crystals -Statistical physics -Condensed matter -Thermodynamics -Dislocations in crystals -Plasticity -Condensed matter |
Rights:
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(c) The American Physical Society, 2001
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Document type:
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Article Article - Published version |
Published by:
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The American Physical Society
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