Modelling plastic deformation of metals over a wide range of strain rates using irreversible thermodynamics

Huang, Mingxin and Rivera-Díaz-Del-Castillo, Pedro E J and Bouaziz, Olivier and Van Der Zwaag, Sybrand (2009) Modelling plastic deformation of metals over a wide range of strain rates using irreversible thermodynamics. IOP Conference Series: Materials Science and Engineering, 3. ISSN 1757-8981

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Abstract

Based on the theory of irreversible thermodynamics, the present work proposes a dislocation-based model to describe the plastic deformation of FCC metals over wide ranges of strain rates. The stress-strain behaviour and the evolution of the average dislocation density are derived. It is found that there is a transitional strain rate (∼ 104 s-1) over which the phonon drag effects appear, resulting in a significant increase in the flow stress and the average dislocation density. The model is applied to pure Cu deformed at room temperature and at strain rates ranging from 10-5 to 106 s-1 showing good agreement with experimental results.

Item Type:
Journal Article
Journal or Publication Title:
IOP Conference Series: Materials Science and Engineering
Uncontrolled Keywords:
/dk/atira/pure/subjectarea/asjc/2500
Subjects:
ID Code:
125504
Deposited By:
Deposited On:
24 May 2018 15:44
Refereed?:
Yes
Published?:
Published
Last Modified:
01 Jan 2020 11:21