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Residual stress in a laser welded EUROFER blanket module assembly using non-destructive neutron diffraction techniques

Hughes, D; Koukovini-Platia, E and Heeley, Ellen (2014). Residual stress in a laser welded EUROFER blanket module assembly using non-destructive neutron diffraction techniques. Fusion Engineering and Design, 89(2) pp. 104–108.

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DOI (Digital Object Identifier) Link: https://doi.org/10.1016/j.fusengdes.2013.12.041
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Abstract

Whilst the structural integrity and lifetime considerations in welded joints for blanket modules can be predicted using finite element software, it is essential to prove the validity of these simulations. This paper provides detailed analysis for the first time, of the residual stress state in a laser-welded sample with integral cooling channels. State-of-the-art non-destructive neutron diffraction was employed to determine the triaxial stress state and to understand microstructural changes around the heat affected zone. Synchrotron X-ray diffraction was used to probe the variation of strain-free lattice reference parameter around the weld zone allowing correction of the neutron measurements. This paper details an important experimental route to validation of predicted stresses in complex safety-critical reactor components for future applications.

Item Type: Journal Item
Copyright Holders: 2014 Elsevier B.V.
ISSN: 0920-3796
Keywords: EUROFER; laser welds; blanket assemblies; residual stress
Academic Unit/School: Faculty of Science, Technology, Engineering and Mathematics (STEM) > Life, Health and Chemical Sciences
Faculty of Science, Technology, Engineering and Mathematics (STEM)
Item ID: 39623
Depositing User: Ellen Heeley
Date Deposited: 28 Feb 2014 10:39
Last Modified: 07 Dec 2018 12:48
URI: http://oro.open.ac.uk/id/eprint/39623
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