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:
ID Code:
125502
Deposited By:
Deposited On:
24 May 2018 15:40
Refereed?:
Yes
Published?:
Published
Last Modified:
25 Feb 2020 08:22