Abstract
In this work, computer-modeling methods have been used to consider the formation of a dislocation loop. The barrier strengths correspond to the reacting (unactivated) and unreacting (activated) forest dislocations. It is determined that the minimum operating stress of the source coincides with the classical, critical Frank-Read stress only for a rather narrow range of length of the sources. In a majority of the cases, it is comparable to the critical stress for flow past a network of barriers. Beyond the front of the dislocations propagating from the source, dislocation loops formed by the Orowan mechanism remain, the total length of which is equal to 12–14% of the length of the loop formed.
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Tomsk Structural Engineering Institute. Translated from Izvestiya Vysshikh Uchebnykh Zavedenii, Fizika, No. 10, pp. 20–24, October, 1992.
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Golosova, T.N., Slobodskoi, M.I. & Popov, L.E. Modeling of a dislocation source in the field of activated and unactivated discrete barriers. Russ Phys J 35, 912–916 (1992). https://doi.org/10.1007/BF00559882
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DOI: https://doi.org/10.1007/BF00559882