DISSIPATIVE DISLOCATION TUNNELING AT FINITE TEMPERATURES

Citation
Bv. Petukhov et al., DISSIPATIVE DISLOCATION TUNNELING AT FINITE TEMPERATURES, Philosophical magazine. A. Physics of condensed matter. Structure, defects and mechanical properties, 77(4), 1998, pp. 1041-1052
Citations number
28
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Physics, Applied","Material Science","Physics, Condensed Matter","Metallurgy & Metallurigical Engineering
ISSN journal
1364-2804
Volume
77
Issue
4
Year of publication
1998
Pages
1041 - 1052
Database
ISI
SICI code
1364-2804(1998)77:4<1041:DDTAFT>2.0.ZU;2-2
Abstract
A theory for thermally assisted dislocation tunnelling through the Pei erls barrier is developed. The theory takes into account the influence of dissipation on the underbarrier motion and describes the temperatu re and stress dependences of kink pair formation for any values of dis location viscosity. Macroscopic plastic deformation parameters such as the flow stress and the stran-rate sensitivity are calculated and com pared with the experimental data on low-temperature plastic deformatio n of lithium hydride.