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Quantification of Residual Stresses in Electron Beam Welded Fracture Mechanics Specimens

Kapadia, Priyesh; Davies, Catrin; Pirling, Thilo; Hofmann, Michael ; Wimpory, Robert; Hosseinzadeh, Foroogh; Dean, David and Nikbin, Kamran (2017). Quantification of Residual Stresses in Electron Beam Welded Fracture Mechanics Specimens. International Journal of Solids and Structures, 106-107 pp. 106–118.

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Residual stress measurements have been made in a range of electron beam welded samples to study how the weld induced residual stresses redistributed during fabrication of compact tension, C(T), specimens. The samples were manufactured from Type 316H stainless steel in the ex-service material condition and in material which had been preconditioned by inducing 8% plastic strain. Measurements made using neutron diffraction, slitting and the contour method were generally in good agreement and showed residual stress components of up to three times the base material's yield strength existed in the samples. When sectioning a sample to perform the contour method, large elastic deformations occurred at the cut tip due to the large residual stresses present. A correction was applied to the measured surface displacements to account for this deformation. Neutron diffraction measurements were made at various stages of the fabrication process, which showed significant stress redistribution occurred as the welded samples were machined into C(T) specimens. However the tensile stresses near the crack tip of the C(T) specimens remained large and could significantly influence subsequent crack growth tests.

Item Type: Journal Item
Copyright Holders: 2016 Elsevier Ltd
ISSN: 0020-7683
Project Funding Details:
Funded Project NameProject IDFunding Body
Research Infrastructures283883 NMI3 IIEuropean Union FP7
Keywords: Residual stress; Neutron diffraction; Contour method; Slitting; Electron beam welding; Type 316H stainless steel
Academic Unit/School: Faculty of Science, Technology, Engineering and Mathematics (STEM) > Engineering and Innovation
Faculty of Science, Technology, Engineering and Mathematics (STEM)
Item ID: 48926
Depositing User: Foroogh Hosseinzadeh
Date Deposited: 14 Mar 2017 15:27
Last Modified: 15 Mar 2017 14:04
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