Liquation and post-weld heat treatment cracking in Rene 80 laser repair welds

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dc.contributor.authorRush, M. T.-
dc.contributor.authorColegrove, Paul A.-
dc.contributor.authorZhang, Z.-
dc.contributor.authorBroad, D.-
dc.date.accessioned2012-01-27T23:01:40Z
dc.date.available2012-01-27T23:01:40Z
dc.date.issued2012-01-31T00:00:00Z-
dc.description.abstractAn extensive experimental study on a nickel-based superalloy, Rene 80 using autogenous laser welding has been undertaken to determine the effect of the process parameters and weld bead geometry on cracking in the as-welded and post- weld heat treated conditions. Little cracking was observed in the as-welded condition with low powers and beam diameters around 2.5mm. Welding speed had little effect on the incidence of cracking in the as-welded condition. Investigation of the aspect ratio (penetration divided by width) indicated that little cracking occurred in the as-welded condition when the aspect ratio was approximately 0.5. The same effect was observed with the post-weld heat treated samples. An analysis of the microstructures indicated that the cracking was caused primarily by liquation in the as-welded condition and was exacerbated by post-weld heat treatment cracking during the subsequent heat treatment. Finally the study resolved some of the contradictory findings in the literature on the effect of process parameters on the incidence of cracking in the as-welded and post-weld heat treated conditions.en_UK
dc.identifier.citationMatthew T. Rush, Paul A. Colegrove, Zhu Zhang, David Broad, Liquation and post-weld heat treatment cracking in Rene 80 laser repair welds, Journal of Materials Processing Technology, Volume 212, Issue 1, January 2012, Pages 188–197.
dc.identifier.issn0924-0136-
dc.identifier.urihttp://dx.doi.org/10.1016/j.jmatprotec.2011.09.001-
dc.identifier.urihttp://dspace.lib.cranfield.ac.uk/handle/1826/6896
dc.publisherElsevier Science B.V., Amsterdam.en_UK
dc.rightsNOTICE: this is the author’s version of a work that was accepted for publication in Journal of Materials Processing Technology Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published in Journal of Materials Processing Technology, VOL 212, ISSUE 1, (2012) DOI:10.1016/j.jmatprotec.2011.09.001
dc.subjectLiquation crackingen_UK
dc.subjectNickel superalloyen_UK
dc.subjectLaser weldingen_UK
dc.subjectStrain-age crackingen_UK
dc.subjectPost weld heat treatment crackingen_UK
dc.subjectRene 80en_UK
dc.subjectRepair weldingen_UK
dc.subjectPWHT crackingen_UK
dc.titleLiquation and post-weld heat treatment cracking in Rene 80 laser repair weldsen_UK
dc.typeArticle-

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