ISIS Neutron and Muon Source Data Journal

The Effect of Closure Weld Thermal Cycles on the Evolution of Residual Stresses at the Dissimilar Metal Weld-buttering Interface of Forged C

Abstract: Cr-Mo steel forgings are used in oil and gas components to provide flow control and protection against over-pressure. Joining forgings to flow line requires 2 steps: Dissimilar metal weld-buttering layer deposited to forging in-shop followed by post-weld heat-treatment (PWHT); then a closure weld is made in-field joining the weld-buttered layer to pipe steel and no PWHT is done. As PWHT is completed in step 1 reducing residual stress, further thermal cycles from closure weld will increase stress at the forging-weld-buttering interface. Studies report failure at interface from damaging microstructure and hydrogen up-take. However, quantification of residual stress at the interface was not studied, nor contribution to cracking determined. This proposal aims to quantify the effect of closure weld thermal cycles on the evolution of residual stresses at the forging-weld-buttering interface.

Principal Investigator: Dr Mark Callaghan
Experimenter: Professor Philip Withers
Experimenter: Dr John Francis
Experimenter: Dr Saurabh Kabra

DOI: 10.5286/ISIS.E.RB1410310

ISIS Experiment Number: RB1410310

Publisher: STFC ISIS Neutron and Muon Source

Data format: RAW/Nexus
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Data Citation

The recommended format for citing this dataset in a research publication is as:
[author], [date], [title], [publisher], [doi]

For Example:
Dr Mark Callaghan et al; (2015): The Effect of Closure Weld Thermal Cycles on the Evolution of Residual Stresses at the Dissimilar Metal Weld-buttering Interface of Forged C, STFC ISIS Neutron and Muon Source, https://doi.org/10.5286/ISIS.E.RB1410310

Data is released under the CC-BY-4.0 license.