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Modelling of the Evolution of Dislocation Cell Misorientation under Severe Plastic Deformation

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Abstract:

A model describing the evolution of the misorientation angle between dislocation cells with plastic strain is proposed. The model is applied to the case of equal channel angular pressing (ECAP) of copper. In a basic version of the model, the evolution of the average misorientation angle is traced. A way of handling the evolution of the misorientation angle distribution function using a probabilistic description is also outlined.

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Periodical:

Materials Science Forum (Volumes 503-504)

Pages:

675-680

DOI:

https://doi.org/10.4028/www.scientific.net/MSF.503-504.675

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Online since:

January 2006

Authors:

Yuri Estrin, László S. Tóth, Yves Bréchet, Hyoung Seop Kim

Keywords:

Dislocation Cell Misorientation, Equal-Channel Angular Pressing (ECAP), Fokker-Planck Equation, Langevin Approach, Modeling, Severe Plastic Deformation (SPD)

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© 2006 Trans Tech Publications Ltd. All Rights Reserved

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