Basal slip localization in zinc single crystals. The Considére analyses

Mirosław Wróbel (1) , Krzysztof Pieła (2)

1 Metal Engeenering and Industrial Computer Science
2 Non-Ferrous Metals

The tensile and compression tests of zinc single crystals oriented for slip in the basal slip system were performed. During the first stage of the stress-strain curve, the localized necking was typical to the strain localization in the tensile specimens. Single or multiple necks were formed along the specimen length. The range of temperature and the strain rate for the single necking of the sample was determined. It was found that the formation of such necking depends on strain hardening characteristics and can be predicted by the Considére criterion. On the other hand, propagation of the necked area along the sample length was not predictable by this criterion. Localized sliding and specimen kinking was indicative of the strain localization observed for different specimens compressed under the same conditions, i.e., temperature and strain rate. A decrease in the compression force and in the cross-sectional area with anvils displacements produced localized sliding. On the other hand, a continuous increase in the compression force was representative of tests leading to specimen kinking.

Mots clés: Physical Sciences

Mirosław Wróbel, Krzysztof Pieła. Basal slip localization in zinc single crystals. The Considére analyses. Philosophical Magazine, 2010, 90 (14), pp.1873-1891. ⟨10.1080/14786430903571446⟩. ⟨hal-00587605⟩