Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
797764 | Mechanics of Materials | 2009 | 7 Pages |
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.
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Mechanical Engineering
Authors
Mingxin Huang, Pedro E.J. Rivera-Díaz-del-Castillo, Olivier Bouaziz, Sybrand van der Zwaag,