A constitutive model for high strain rate deformation in FCC metals based on irreversible thermodynamics

Huang, Mingxin and Rivera-Díaz-del-Castillo, Pedro E.J. and Bouaziz, Olivier and van der Zwaag, Sybrand (2009) A constitutive model for high strain rate deformation in FCC metals based on irreversible thermodynamics. Mechanics of Materials, 41 (9). pp. 982-988. ISSN 0167-6636

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Abstract

The present work extends a recent model for plastic deformation of polycrystalline metals based on irreversible thermodynamics. A general dislocation evolution equation is derived for a wide range of strain rates. It is found that there is a transitional strain rate (∼103 s-1) over which the phonon drag effects play a dominant role in dislocation generation resulting in a significant raise in the dislocation density and flow stress. The model reduces to the classical Kocks-Mecking model at low strain rates.

Item Type: Journal Article
Journal or Publication Title: Mechanics of Materials
Uncontrolled Keywords: /dk/atira/pure/subjectarea/asjc/2200/2211
Subjects:
Departments: Faculty of Science and Technology > Engineering
ID Code: 125502
Deposited By: ep_importer_pure
Deposited On: 24 May 2018 15:40
Refereed?: Yes
Published?: Published
Last Modified: 25 Feb 2020 08:22
URI: https://eprints.lancs.ac.uk/id/eprint/125502

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