Kundu, A.; Bouchard, P. J.; Kumar, S.; Venkata, K. A.; Francis, J. A.; Paradowska, A.; Dey, G. K. and Truman, C. E.
|DOI (Digital Object Identifier) Link:||http://doi.org/10.1179/1362171812Y.0000000076|
|Google Scholar:||Look up in Google Scholar|
This paper describes the characterisation of residual stress in electron beam welded P91 ferritic– martensitic steel plates (9 mm thick) by neutron diffraction and contour measurement methods. The novelty of the work lies in revealing the residual stress profile at a fine length scale associated with a ∼1 mm wide fusion zone. A characteristic ‘M’ shaped distribution of stresses across the weld line is observed with high tensile peaks situated just beyond the heat affected zone/parent material boundary. Measured stresses close to the weld centreline are significantly less tensile than the adjacent peaks owing to martensitic phase transformation during cool down of the weld region. The effect of applying a second smoothing weld pass is shown to be undesirable from a residual stress standpoint because it increases the tensile magnitude and spread of residual stress. The results are suitable for validating finite element predictions of residual stress in electron beam welds made from ferritic–martensitic steels.
|Item Type:||Journal Article|
|Copyright Holders:||2013 Institute of Materials, Minerals and Mining. Published by Maney on behalf of the Institute|
|Keywords:||ferritic–martensitic steel; neutron diffraction; type IV cracking; phase transformation|
|Academic Unit/Department:||Faculty of Science, Technology, Engineering and Mathematics (STEM) > Engineering and Innovation
Faculty of Science, Technology, Engineering and Mathematics (STEM)
|Depositing User:||Olivia Acquah|
|Date Deposited:||06 Nov 2012 12:04|
|Last Modified:||02 Aug 2016 14:22|
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