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Microstructure evolution in the equal channel angular extrusion process

Sivakumar, Srinivasan M. and Ortiz, Michael (2004) Microstructure evolution in the equal channel angular extrusion process. Computer Methods in Applied Mechanics and Engineering, 193 (48-51). pp. 5177-5194. ISSN 0045-7825. doi:10.1016/j.cma.2004.01.036.

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We apply a theory of single-crystal plasticity with microstructure to the simulation of the ECAE process. The specific microstructures considered in the simulations are of the sequential lamination type. The size of the microstructure is estimated a posteriori by means of a nonlocal extension of the theory which accounts for dislocation energies. Texture evolution is calculated simply by recourse to Taylor’s hypothesis. Calculations concerned with an FCC material (Al–Cu alloy) and 90° ECAE reveal a wealth of information regarding the geometry, size, and texture evolution of subgrain microstructures. The predicted sizes and textures are in good quantitative agreement with the available experimental data.

Item Type:Article
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URLURL TypeDescription
Ortiz, Michael0000-0001-5877-4824
Additional Information:© 2004 Elsevier. Received 24 October 2003, Revised 23 January 2004, Accepted 23 January 2004, Available online 2 September 2004. The authors gratefully acknowledge the support of the Department of Energy through Caltech’s ASCI ASAP Center for Simulating Dynamic Response of Materials. We are grateful to Dr. Carlos Tomé and Dr. Irene Beyerlein for many useful discussions, for making the POLE program available to us, and for making unpublished work available to us. We gratefully acknowledge Mr. Matt Fago for providing a program for plotting sequential laminates.
Funding AgencyGrant Number
Department of Energy (DOE)UNSPECIFIED
Subject Keywords:Single crystals; Non-convex; Dislocation structures; ECAE; Textures; Crystal plasticity
Issue or Number:48-51
Record Number:CaltechAUTHORS:20171128-114315582
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Official Citation:Srinivasan M. Sivakumar, Michael Ortiz, Microstructure evolution in the equal channel angular extrusion process, In Computer Methods in Applied Mechanics and Engineering, Volume 193, Issues 48–51, 2004, Pages 5177-5194, ISSN 0045-7825, (
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:83525
Deposited By: Lydia Suarez
Deposited On:28 Nov 2017 22:02
Last Modified:15 Nov 2021 20:11

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