Dislocations emitted from nanocrystalline grain boundaries: nucleation and splitting distance
The nucleation and propagation of dissociated full dislocations from grain boundaries in nanocrystalline fcc metals is discussed in terms of the splitting distance between two partial dislocations. It is demonstrated that the use of the splitting distance assumes the existence of the partial disloca...
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| Veröffentlicht in: | Acta materialia 2004-12, Vol.52 (20), p.5863-5870 |
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| container_title | Acta materialia |
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| creator | Frøseth, A.G. Derlet, P.M. Van Swygenhoven, H. |
| description | The nucleation and propagation of dissociated full dislocations from grain boundaries in nanocrystalline fcc metals is discussed in terms of the splitting distance between two partial dislocations. It is demonstrated that the use of the splitting distance assumes the existence of the partial dislocations and therefore can not account for nucleation criteria. Moreover, even once both partial dislocations are nucleated, the local stress distribution seems to play an important role in the separation of the partials. |
| doi_str_mv | 10.1016/j.actamat.2004.09.001 |
| format | Article |
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| source | Elsevier ScienceDirect Journals |
| subjects | Condensed matter: structure, mechanical and thermal properties Defects and impurities in crystals microstructure Exact sciences and technology Linear defects: dislocations, disclinations Physics Structure of solids and liquids crystallography Theories and models of crystal defects |
| title | Dislocations emitted from nanocrystalline grain boundaries: nucleation and splitting distance |
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