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题名: Energetics analysis of interstitial loops in single-phase concentrated solid-solution alloys
作者: Wang, XX;  Niu, LL;  Wang, SQ
发表日期: 2018-4-1
摘要: Systematic energetics analysis on the shape preference, relative stability and radiation-induced segregation of interstitial loops in nickel-containing single-phase concentrated solid-solution alloys have been conducted using atomistic simulations. It is shown that the perfect loops prefer rhombus shape for its low potential energy, while the Frank faulted loops favor ellipse for its low potential energy and the possible large configurational entropy. The decrease of stacking fault energy with increasing compositional complexity provides the energetic driving force for the formation of faulted loops, which, in conjunction with the kinetic factors, explains the experimental observation that the fraction of faulted loops rises with increasing compositional complexity. Notably, the kinetics is primarily responsible for the absence of faulted loops in nickel-cobalt with a very low stacking fault energy. We further demonstrate that the simultaneous nickel enrichment and iron/chromium depletion on interstitial loops can be fully accounted for by their energetics. (C) 2018 Elsevier B.V. All rights reserved.
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Recommended Citation:
Wang, XX,Niu, LL,Wang, SQ. Energetics Analysis Of Interstitial Loops In Single-phase Concentrated Solid-solution Alloys[J]. Journal Of Nuclear Materials,2018,501:94-103.

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