On Basal slip and basal twinning in sapphire (α-Al 2O 3)—II. A new model of basal twinning
Based on a new model for basal slip in sapphire developed in Part I of this series of papers, the formation of a basal twin is considered. It is shown that deformation twinning is a natural outgrowth of the present model of slip when the material is deformed in a particular regime of temperature and...
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| Veröffentlicht in: | Acta materialia 1996-05, Vol.44 (5), p.2153-2164 |
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| container_title | Acta materialia |
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| creator | Pirouz, P. Lawlor, B.F. Geipel, T. Bilde-Sørensen, J.B. Heuer, A.H. Lagerlo¨f, K.P.D. |
| description | Based on a new model for basal slip in sapphire developed in Part I of this series of papers, the formation of a basal twin is considered. It is shown that deformation twinning is a natural outgrowth of the present model of slip when the material is deformed in a particular regime of temperature and stress. The model is based on the glide of a leading partial dislocation on a basal slip plane and double-cross-slip to the next-but-one slip plane. The model predicts a Type-II twin, i.e. a twin related to the matrix by a 2-fold axis along the direction of shear,
η
1 = [101¯0〉, and lying in the twin/matrix interface. |
| doi_str_mv | 10.1016/1359-6454(95)00265-0 |
| format | Article |
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η
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η
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η
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| identifier | ISSN: 1359-6454 |
| ispartof | Acta materialia, 1996-05, Vol.44 (5), p.2153-2164 |
| issn | 1359-6454 1873-2453 |
| language | eng |
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| source | Access via ScienceDirect (Elsevier) |
| subjects | Condensed matter: structure, mechanical and thermal properties Defects and impurities in crystals microstructure Exact sciences and technology Grain and twin boundaries Physics Structure of solids and liquids crystallography |
| title | On Basal slip and basal twinning in sapphire (α-Al 2O 3)—II. A new model of basal twinning |
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