On low temperature plastic instability in pure niobium single crystals
- 1 August 1971
- journal article
- research article
- Published by Taylor & Francis in Philosophical Magazine
- Vol. 24 (188) , 437-449
- https://doi.org/10.1080/14786437108227399
Abstract
Niobium single crystals of good purity and of various orientations were tested in tension between 2·17 and 17°K. At temperatures below about 12°K. heterogeneous deformation takes place. It seems possible to explain this behaviour by the local heating due to moving dislocations. The thermal origin of this instability is deduced by comparing stress–strain curves performed at 2·17°K in the normal and superconductive states. The influence of purity and temperature on thermal softening is discussed.Keywords
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