Cross-slip of twinning dislocations on crossing domain boundaries in ordered Ni3V
- 1 February 1983
- journal article
- research article
- Published by Taylor & Francis in Philosophical Magazine A
- Vol. 48 (2) , 265-277
- https://doi.org/10.1080/01418618308244314
Abstract
Zigzag propagation of deformation microtwins across the domain structure, as observed by electron microscopy in ordered Ni3V alloy, is shown to be due to cross-slip of partial dislocations via the stair-rod mode (Fleischer 1959). Twin bands change direction to preserve the long-range order inside domains. The peculiarities of the interaction of twinning dislocations with domain boundaries are studied, and an activation energy for such a cross-slip mechanism is evaluated. It is shown that local stress concentration at the microtwin tip makes cross-slip easier.Keywords
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