HAZ cold cracking - a restrained view

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dc.contributor.authorSquires, IFen_AU
dc.contributor.authorFeng, Ben_AU
dc.contributor.authorMercer, Den_AU
dc.contributor.authorPayten, WMen_AU
dc.contributor.authorDunne, Den_AU
dc.contributor.authorAlam, Nen_AU
dc.date.accessioned2024-04-22T04:17:51Zen_AU
dc.date.available2024-04-22T04:17:51Zen_AU
dc.date.issued1994en_AU
dc.date.statistics2024-04-12en_AU
dc.descriptionPhysical copy held at by ANSTO Library at DDC: 671.52/12en_AU
dc.description.abstractHeat affected zone (HAZ) hydrogen cracking occurs after the weld has cooled to ambient temperature when the HAZ has transformed and hydrogen has had time to diffuse into it from the weld metal. It is therefore referred to as “cold cracking”. For cracking to occur, a stress needs to be present This will arise inevitably from the local heating and cooling when making the weld, however, the magnitude of the stress will depend on the restraint applied to the weld, the welding conditions used and the geometry of the weld. Recommendations to assist with the avoidance of HAZ cold cracking are available in publications such as WTIA Technical Note 1 “Weldability of Steels” but these cover essentially only the control of the thermal cycle and hydrogen level. The more complex issue of restraint is not included. Consequently the recommendations tend to be either over conservative, hence not fully cost effective, or present unquantied risks. Research work by various authors in this area has been summarised by Suzuki(l) and a basic model produced. The work covered a variety of methodologies and these could not be considered consistent. The present study provides a consistent approach, based on the use of the rigid restraint cracking (RRC) test which allows direct measurement of weld stress. To enable the effect of local stresses to be understood and general models of restraint effects to be developed a finite element analysis (FEA) computer model is being developed in parallel with work on the RRC test Further inputs to the modelling process are being or will be generated from localised studies of mechanical properties in the weld and heat affected zone and from dilatometric studies of the weld. The former will allow more accurate assessment of the behaviour of local stress concentrators in the weld and HAZ. The latter will assist in quantifying the weld metal and HAZ contribution to stress generation.en_AU
dc.identifier.booktitleWelding technology in action : proceedings of the 42nd National Welding Conference 1994, Melbourne Hilton on the Parken_AU
dc.identifier.citationSquires, I. F., Feng, B., Mercer, D., Payten, W., Dunne, D., & Alam, A. (1994). HAZ cold cracking - a restrained view. Paper presented to the 42nd National Welding Conference 1994, "Welding Technology in Action", Melbourned Hilton on the Park. In Welding technology in action : proceedings of the 42nd National Welding Conference, 1994, Melbourne Hilton on the Park, (Paper 51).en_AU
dc.identifier.conferenceenddate1994en_AU
dc.identifier.conferencename42nd National Welding Conference 1994, "Welding Technology in Action"en_AU
dc.identifier.conferenceplaceMelbourne, Australiaen_AU
dc.identifier.conferencestartdate1994en_AU
dc.identifier.otherPaper 51en_AU
dc.identifier.placeofpublicationSilverwater, New South Walesen_AU
dc.identifier.urihttps://apo.ansto.gov.au/handle/10238/15561en_AU
dc.identifier.volume3en_AU
dc.language.isoenen_AU
dc.publisherWelding Technology Institute of Australiaen_AU
dc.subjectHeat Affected Zoneen_AU
dc.subjectHydrogenen_AU
dc.subjectCrackingen_AU
dc.subjectWeldingen_AU
dc.subjectAmbient temperatureen_AU
dc.subjectThermal cyclingen_AU
dc.subjectFinite element methoden_AU
dc.titleHAZ cold cracking - a restrained viewen_AU
dc.typeConference Paperen_AU
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