Final published version
Research output: Contribution to Journal/Magazine › Journal article › peer-review
Article number | 012006 |
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<mark>Journal publication date</mark> | 2009 |
<mark>Journal</mark> | IOP Conference Series: Materials Science and Engineering |
Volume | 3 |
Number of pages | 7 |
Publication Status | Published |
<mark>Original language</mark> | English |
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.