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Effect of rhenium irradiations on the mechanical properties of tungsten for nuclear fusion applications / Aneeqa Khan, Robert Elliman, Cormac Corr, Joven J.H. Lim, Andrew Forrest, Paul Mummery, Llion Evans

Journal of Nuclear Materials, Volume: 477, Pages: 42 - 49

Swansea University Author: Llion Evans

Abstract

As-received and annealed tungsten samples were irradiated at a temperature of 400 °C with Re and W ions to peak concentrations of 1600 appm (atomic parts per million) and damage levels of 40 dpa (displacements per atom). Mechanical properties were investigated using nanoindentation, and the orientat...

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Published in: Journal of Nuclear Materials
ISSN: 0022-3115
Published: 2016
Online Access: Check full text

URI: https://cronfa.swan.ac.uk/Record/cronfa39996
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Abstract: As-received and annealed tungsten samples were irradiated at a temperature of 400 °C with Re and W ions to peak concentrations of 1600 appm (atomic parts per million) and damage levels of 40 dpa (displacements per atom). Mechanical properties were investigated using nanoindentation, and the orientation and depth dependence of irradiation damage was investigated using Electron Back Scatter Diffraction (EBSD). Following irradiation there was a 13% increase in hardness in the as received sheet and a 23% increase in the annealed material for both tungsten and rhenium irradiation. The difference between the tungsten and rhenium irradiated samples was negligible, suggesting that for the concentrations and damage levels employed, the presence of rhenium does not have a significant effect on the hardening mechanism. Energy dependent EBSD of annealed samples provided information about the depth distribution of the radiation damage in individual tungsten grains and confirmed that the radiation damage is orientation dependant.
Keywords: radiation damage, fusion, tungsten, rhenium, nanoindentation, electron back scatter diffraction, mechanical properties
College: College of Engineering
Start Page: 42
End Page: 49