Final published version
Research output: Contribution to Journal/Magazine › Journal article › peer-review
<mark>Journal publication date</mark> | 09/2009 |
---|---|
<mark>Journal</mark> | Mechanics of Materials |
Issue number | 9 |
Volume | 41 |
Number of pages | 7 |
Pages (from-to) | 982-988 |
Publication Status | Published |
<mark>Original language</mark> | English |
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.