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Grain size threshold for enhanced irradiation resistance in nanocrystalline and ultrafine tungsten

El-Atwani, O., Hinks, J. A., Greaves, Graeme, Allain, J. P. and Maloy, S. A. (2017) Grain size threshold for enhanced irradiation resistance in nanocrystalline and ultrafine tungsten. Materials Research Letters, 5 (5). pp. 343-349. ISSN 2166-3831

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Abstract

Nanocrystalline metals are considered highly radiation-resistant materials due to their large grain boundary areas. Here, the existence of a grain size threshold for enhanced irradiation resistance in high-temperature helium-irradiated nanocrystalline and ultrafine tungsten is demonstrated. Average bubble density, projected bubble area and the corresponding change in volume were measured via transmission electron microscopy and plotted as a function of grain size for two ion fluences. Nanocrystalline grains of less than 35 nm size possess ∼10–20 times lower change in volume than ultrafine grains and this is discussed in terms of the grain boundaries defect sink efficiency

Item Type: Article
Subjects: Q Science > QC Physics
Schools: School of Computing and Engineering
School of Computing and Engineering > Electron Microscopy and Materials Analysis
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Depositing User: Jonathan Hinks
Date Deposited: 22 Jun 2017 08:01
Last Modified: 06 Nov 2017 18:11
URI: http://eprints.hud.ac.uk/id/eprint/32275

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