Abstract
The eect of deformation-induced disorientations on work-hardening of metals is modelled by dislocation dynamics. By incorporating excess dislocations related to disori- entations, Kocks' dislocation model describing stage III hardening is extended to stage IV. Disorientations evolving from purely statistical reasons still lead to stage III behavior and a saturation of the ow stress, but deterministic contributions to the development of disorienta- tions, as dierences in activated slip systems across boundaries, cause a linear increase of the flow stress at large strains. Such a constant work-hardening rate is characteristic for stage IV.
Original language | English |
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Journal | Materials Science Forum |
Volume | 482 |
Pages (from-to) | 155-158 |
ISSN | 0255-5476 |
DOIs | |
Publication status | Published - 2005 |
Event | 4th International Conference on Materials Structure and Micromechanics of Fracture - Brno, Czech Republic Duration: 23 Jun 2004 → 25 Jun 2004 |
Conference
Conference | 4th International Conference on Materials Structure and Micromechanics of Fracture |
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Country/Territory | Czech Republic |
City | Brno |
Period | 23/06/2004 → 25/06/2004 |
Keywords
- Dislocation Dynamics
- Disorientation
- Modeling
- Stage IV
- Work-Hardening