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

被引：8
|
作者：
Huang, Mingxin [1 ,2 ]
Rivera-Diaz-del-Castillo, Pedro E. J. [1 ]
Bouaziz, Olivier [2 ]
van der Zwaag, Sybrand [1 ]
机构：
[1] Delft Univ Technol, Fac Aerosp Engn, Kluyverweg 1, NL-2629 HS Delft, Netherlands
[2] ArcelorMittal Maizieres, Res & Dev, F-57283 Maizieres les Metz, France
来源：
DISLOCATIONS 2008 | 2009年 / 3卷
关键词：
CONSTITUTIVE DESCRIPTION; DEPENDENT DEFORMATION; STRESS; COPPER;
D O I：
10.1088/1757-899X/3/1/012006
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
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 (similar to 10(4) 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 10(6) s(-1) showing good agreement with experimental results.
引用
收藏
页数：6
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