Effect of external stresses on efficiency of dislocation sinks in BCC (Fe, V) and FCC (Cu) crystals

doi:10.1134/S2075113315050184

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DOI Доступ к ресурсу на сайте издателя			10.1134/S2075113315050184

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Title: Effect of external stresses on efficiency of dislocation sinks in BCC (Fe, V) and FCC (Cu) crystals
Creator: Sivak, A. B.
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Romanov, V. A.
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Chernov, Viatcheslav M.
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Sivak, P. A.
Date: 2015
DOI: 10.1134/S2075113315050184
Description: The efficiency of linear sinks for selfpoint defects (SPDs) elastically interacting (dislocations) and not interacting with sinks with the density of 3 × 1014 m–2 is calculated for BCC (Fe, V) and FCC (Cu) crystals at the temperature 293 K using the object kinetic Monte Carlo technique, depending on type and value of applied mechanical load (up to 200 MPa) and types of linear sinks. Full straight dislocations in slip systems [111](1 0), [111](11 ), [100](001), and [100](011) for Fe and V and [100](001) for Cu are considered for dislocation sinks (DSs). Orientations of noninteracting linear sinks (NILSs) coincide with those of DSs. Interaction of SPDs with internal (dislocation) and external stress fields is calculated within the framework of anisotropic linear theory of elasticity. Relative changes in efficiency of different codirectional linear sinks (either interacting or not interacting with SPDs) under action of applied stress are approximately identical under low stress. Radiation creep rates are calculated for the considered crystals under uniaxial stress in the stationary regime of Frenkel pairs generation. The creep rate strongly depends on the loading direction and Burgers vector of dislocations in Fe and V, and it is almost independent of these parameters in Cu. At the same generation rate of Frenkel pairs, the radiation creep rate averaged over all loading directions is significantly higher in BCC (Fe, V) crystals containing dislocations with the Burgers vector a/2〈111〉 than in FCC (Cu) crystals.

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collection(s): Сибирский физико-технический институт
Identifier: смотреть в электронном каталоге НБ ТГУ
Type: статьи в журналах
Source: Inorganic materials: applied research. 2015. Vol. 6, № 5. P. 466-472
Language: eng

Created: 12-10-2016

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Сибирский физико-технический институт Effect of external stresses on efficiency of dislocation sinks in BCC (Fe, V) and FCC (Cu) crystals