| Autor: |
Dobromyslov, A., Taluts, N., Dolgikh, G., Kozlov, E. |
| Zdroj: |
Physics of Metals & Metallography; Apr2011, Vol. 111 Issue 4, p375-384, 10p |
| Abstrakt: |
Methods of X-ray diffraction, optical metallography, scanning and transmission electron microscopy, and microhardness measurements have been used for a layer-by-layer examination of the structure of a niobium single crystal after loading by spherically converging shock waves. It has been found that after loading the sample acquires a polycrystalline structure in the most part of its volume. It has been revealed that the basic mechanisms of high-strain-rate plastic deformation of the niobium single crystal are slip and the formation of a vortex structure through the development of deformation localization bands and the simultaneous formation and expansion of an internal cavity. The method of loading used in the study does not lead to the formation of adiabatic shear bands in niobium single crystals. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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