Slip structures and cross-slip of screw dislocations during the deformation of NaCl single crystals at low temperatures
| Autor: | A.V. Nikiforov, F. Appel, U. Messerschmidt, O.V. Klyavin, V. Schmidt |
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| Rok vydání: | 1982 |
| Předmět: |
musculoskeletal diseases
Materials science Liquid helium Lüders band General Engineering Cross Slip Slip (materials science) Liquid nitrogen Physics::Geophysics law.invention Physics::Fluid Dynamics Condensed Matter::Materials Science Crystallography law Impurity Homogeneous Partial dislocations Composite material |
| Zdroj: | Materials Science and Engineering. 56:211-218 |
| ISSN: | 0025-5416 |
| DOI: | 10.1016/0025-5416(82)90096-9 |
| Popis: | NaCl single crystals were deformed at liquid helium temperature and at liquid nitrogen temperature. The slip structure was investigated by the gold decoration technique. At liquid helium temperature, relatively pure crystals show a predominance of sharp narrow slip bands with a high internal strain. Localized displacements of the bands are frequently indicated by microcracks. At liquid nitrogen temperature the slip is homogeneous in most cases. In the work reported in this paper, the slip steps of individual dislocations are imaged, and the cross-slip processes of screw dislocations were investigated as a function of the concentration of divalent cationic impurities. Both the cross-glide events were almost identical with the corresponding room temperature data. The results suggest that cross-slip is initiated by long-range internal stresses. |
| Databáze: | OpenAIRE |
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