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An experimental validation of residual stresses in weld clad pipelines

Schnier, Gladys and Wood, James and Galloway, Alexander (2013) An experimental validation of residual stresses in weld clad pipelines. In: Research and Applications in Structural Engineering, Mechanics & Computation. Taylor and Francis, CRC Press, pp. 613-617. ISBN 978-1-138-00061-2

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    Abstract

    The nature and distribution of residual stresses are invariably critical for fatigue life with dissimilar material joints often inducing high tensile residual stresses. A fatigue-resistant concept of weld cladding process pipelines, producing compressive residual stresses, is under investigation to examine how these stresses may be influenced. Simplified weld cladding simulations have successfully illustrated the development and distribution of residual stresses through the joint. The study has highlighted the importance of accurate material data for clad and substrate materials with current analysis assumptions in a simple thick-walled pipe discussed. Experimental validation, using ICHD, measured residual stresses with depth on weld clad specimens, resulting in good correlation between simulation and experiment for a nickel-chromium-based superalloy clad on low alloy carbon steel as discussed. Future work, including a full 3D representation of the cladding process and a comparison of residual stress measurement methods, are also discussed.