Numerical analysis of retained residual stresses in C(T) specimen extracted from a multi-pass austenitic weld and their effect on crack growth

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dc.contributor.authorMuránsky, Oen_AU
dc.contributor.authorSmith, MCen_AU
dc.contributor.authorBendeich, PJen_AU
dc.contributor.authorHosseinzadeh, Fen_AU
dc.contributor.authorEdwards, Len_AU
dc.date.accessioned2016-10-10T00:20:53Zen_AU
dc.date.available2016-10-10T00:20:53Zen_AU
dc.date.issued2014-08en_AU
dc.date.statistics2016-10-10en_AU
dc.description.abstractSmall scale fracture mechanics test specimens of austenitic stainless steel weld and heat affected zone material are often extracted from non-heat-treated weldments, which contain significant weld residual stresses. Although these stresses are substantially relaxed by the process of specimen extraction, they may still reach levels that can affect subsequent testing if the applied loads are low and deformation is elastic. Long-term creep crack growth testing is one such case, where failure to take account of retained residual stresses could result in unrealistically high measurements of creep crack growth at applied load levels equivalent to those in operating plant. This paper describes a research programme to predict the start-of-creep-test levels of retained residual stress and residual stress intensity factor in compact tension C(T) specimen blanks extracted from non-post heat-treated AISI 316 weldments. The simulations were validated using neutron diffraction and slitting residual stress measurements and stress intensity factor measurement. A pass-by-pass finite element simulation of the original weldment is performed first, and followed by extraction of the C(T) specimen blank. The predicted retained residual stresses in the specimen are compared with residual stress measurements made on similar blank using neutron diffraction, and slitting techniques. The elastic stress intensity factor due to residual stress is then evaluated on the crack plane of the C(T) specimen and compared with experimental measurements made using the slitting method. Good agreement is achieved between measurement and simulation, providing validated basis for future modelling of long term creep crack growth tests. © 2014, Elsevier Ltd.en_AU
dc.identifier.citationMuránsky, O., Smith, M. C., Bendeich, P. J., Hosseinzadeh, F., & Edwards, L. (2014). Numerical analysis of retained residual stresses in C(T) specimen extracted from a multi-pass austenitic weld and their effect on crack growth. Engineering Fracture Mechanics, 126, 40-53. doi:10.1016/j.engfracmech.2014.04.008en_AU
dc.identifier.govdoc7240en_AU
dc.identifier.issn0013-7944en_AU
dc.identifier.journaltitleEngineering Fracture Mechanicsen_AU
dc.identifier.pagination40-53en_AU
dc.identifier.urihttp://dx.doi.org/10.1016/j.engfracmech.2014.04.008en_AU
dc.identifier.urihttp://apo.ansto.gov.au/dspace/handle/10238/7678en_AU
dc.identifier.volume126en_AU
dc.language.isoenen_AU
dc.publisherElsevieren_AU
dc.subjectResidual stressesen_AU
dc.subjectWeldingen_AU
dc.subjectElementsen_AU
dc.subjectStainless steelsen_AU
dc.subjectCreepen_AU
dc.subjectNeutron diffractionen_AU
dc.titleNumerical analysis of retained residual stresses in C(T) specimen extracted from a multi-pass austenitic weld and their effect on crack growthen_AU
dc.typeJournal Articleen_AU
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