Effects of high helium production rate on microstructural evolution in aluminium during 600 MeV proton irradiation

Green, W.V.; Green, S.L.; Singh, B.N.; Leffers, T.

doi:10.1016/0022-3115(82)90768-1

Cited by 20 publications

(1 citation statement)

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“…Given that extended lattice defects, for example, grain boundaries, affect the motion of point defects and defect clusters in a radically different way, we may expect that in the vicinity of those extended defects the growth of cavities is going to be characterized by features that are different from those characterizing the growth in the interior area of the grains. It has been observed experimentally [17][18][19] that in the vicinity of grain boundaries the distribution of growing cavities becomes highly inhomogeneous. The growth of cavities is suppressed in the immediate vicinity of a grain boundary and the rate of growth is maximum at a certain distance from the boundary, decreasing again in the interior region of the grain.…”

Section: Introductionmentioning

confidence: 99%

Inhomogeneous nucleation and growth of cavities in irradiated materials

Dudarev

2000

Phys. Rev. B

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The origin of the effect of inhomogeneous swelling observed near grain boundaries in irradiated materials is examined taking into account both nucleation and diffusional growth of cavities, and the interaction of cavities with mobile interstitial clusters produced in collision cascades. The model shows the formation of a characteristic profile of inhomogeneous swelling that exhibits features similar to those observed experimentally. The rate of swelling is found to be strongly dependent on the size of cavities, with cavities growing near the boundary being able to reach substantially larger sizes than those growing in the interior area of the grain. The distance z* between the peak of swelling and the grain boundary scales with the density of cavities N 0 as z*ϳN 0 Ϫ␤ , where ␤ is close to 1/3.

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Section: Introductionmentioning

confidence: 99%