Neutron Diffraction Residual Stress Measurements in Electron Beam Welded Compact Tension Specimens

Priyesh Kapadia; Catrin M. Davies; Thilo Pirling; David W. Dean; Kamran M. Nikbin

doi:10.4028/www.scientific.net/MSF.777.99

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HomeMaterials Science ForumMaterials Science Forum Vol. 777Neutron Diffraction Residual Stress Measurements...

Neutron Diffraction Residual Stress Measurements in Electron Beam Welded Compact Tension Specimens

Abstract:

In a study to investigate the effect of residual stress relaxation on Creep Crack Growth (CCG) a novel fracture mechanics specimen has been designed. Compact Tension, C(T), specimens are fabricated from blocks with Electron Beam (EB) welds such that residual stresses induced during welding are retained in the specimen. Finite element analyses of EB welding and machining processes have been developed to predict the stresses in such C(T) specimens which will drive crack growth in future CCG studies. The residual stresses and strains in these samples have been quantified using the neutron diffraction measurement technique at various stages of the fabrication process and have been used to validate numerical simulations of the fabrication processes.

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Periodical:

Materials Science Forum (Volume 777)

Pages:

99-104

DOI:

https://doi.org/10.4028/www.scientific.net/MSF.777.99

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Online since:

February 2014

Authors:

Priyesh Kapadia, Catrin M. Davies, Thilo Pirling, David W. Dean, Kamran M. Nikbin

Keywords:

Electron Beam Welding, Neutron Diffraction, Residual Stress, Weld Modelling

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