The effects of dislocation movement in enhancing swelling in α-uranium during irradiation

Speight, M.V.; Greenwood, G. W.

doi:10.1016/0022-3115(65)90120-0

Cited by 11 publications

(1 citation statement)

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“…Fission bubble growth was argued to be negligible at the burnups for which these pores were observed [44], though a few arguments were put forward to support the assertion that the observed pores were gas bubbles which then grew enormously, leading to high swelling above 723 K. Pugh [44] suggested that the large "breakaway swelling" volumes were formed by the diffusion of gaseous fission products to alpha grain boundary cracks, ultimately driving plastic deformation of the matrix. Speight and Greenwood [50] later proposed that dislocation sweeping could promote the breakaway condition by increasing the average bubble size through bubble coalescence. It was also demonstrated that enhanced swelling may arise in α-U for >823 K if the intergranular stresses due to irradiation growth are high enough to move dislocations.…”

Section: Irradiation-induced Growth and Swellingmentioning

confidence: 99%

A Review of Irradiation Damage and Effects in α-Uranium

2022

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Understanding irradiation damage and effects in α-uranium (α-U) is critical to modeling the behavior of U-based metallic fuels. The aim of this review is to address the renewed interest in U-based metallic fuels by examining the state-of-the-art knowledge associated with the effect of irradiation on the microstructure, dimensional changes, and properties of α-U. We critically review the research progress on irradiation-induced growth and swelling, the enhancement of plastic flow and superplasticity by irradiation, and the effect of irradiation on thermal and electrical properties of α-U. Finally, we outline the research directions that require advancements, specifically the need to carry out fundamental research on several of the less understood mechanisms of irradiation damage and effects in α-U.

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Section: Irradiation-induced Growth and Swellingmentioning

confidence: 99%