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Interaction of Cascade‐Generated Nonlinear Elastic Waves with Dislocation Structure Elements in Metals
Author(s) -
Zhukov V. P.,
Boldin A. A.
Publication year - 1991
Publication title -
physica status solidi (b)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.51
H-Index - 109
eISSN - 1521-3951
pISSN - 0370-1972
DOI - 10.1002/pssb.2221660203
Subject(s) - dislocation , cascade , action (physics) , diffusion , collision cascade , plane (geometry) , condensed matter physics , nonlinear system , physics , phase (matter) , materials science , mechanics , chemistry , geometry , quantum mechanics , mathematics , thin film , chromatography , sputtering
The collective action of spherical elastic waves generated in atomic collision cascades under ion bombardment is shown to give rise to a random force similar to white noise in the dislocation glide plane. By way of example, the behaviour of radiation‐produced perfect dislocation loops and dislocation structure segments under the action of this force is investigated. It is found that the loop depth distribution obeys the diffusion equation with a “diffusion coefficient” proportional to the ion current density J while dislocation generation due to Frank‐Read source activation can be described in the framework of first‐order phase transformation theory, with J in the role of temperature.