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Weldability of Ni-Based Superalloys Waspaloy® and Haynes® 282®: A Study Performed with Varestraint Testing
Department of Materials and Manufacturing Technology, Chalmers University of Technology, Gothenburg, Sweden; Research and Technology Department, GKN Aerospace Engine Systems, Trollhättan, Sweden.
University West, Department of Engineering Science, Division of Welding Technology. (PTW)ORCID iD: 0000-0001-9065-0741
Aalto University School of Engineering, Helsinki, Finland.
Aalto University School of Engineering, Helsinki, Finland.
2016 (English)In: Research & Reviews: Journal of Material Sciences, ISSN 2321-6212, Vol. 4, no 4Article in journal (Refereed) Published
Abstract [en]

There is a need for materials with high strength, oxidation resistance, thermal stability and adequate weldability in order to facilitate the production of large structural jet engine components. Therefore, the weldability of Waspaloy® and Haynes® 282® have been evaluated using the Varestraint weldability test. The experiments reveal that Waspaloy® has a higher susceptibility to hot cracking compared to Haynes® 282®. This conclusion is supported by increased total crack length (10 mm or more) and larger brittle temperature range (approx. 65°C) for Waspaloy® when compared to Haynes® 282® in Varestraint and Gleeble hot ductility tests, respectively. The cracking in Haynes® 282® seems to be connected with a secondary phase which presumably can be associated with Ti-Mo based MC-type carbide observed in the fusion zone. Also, a surrounding segregated area is present near this secondary phase as well as along the grain boundaries. Furthermore, micro-Vickers hardness results revealed more or less the same weld metal hardness (260- 280 HV) but a difference in the base metal hardness. The weld metal hardness of Waspaloy® was lower than that of the base metal hardness, while Haynes® 282® had a higher hardness in comparison.

Place, publisher, year, edition, pages
2016. Vol. 4, no 4
Keyword [en]
Varestraint testing, Weldability, Superalloy
National Category
Manufacturing, Surface and Joining Technology
Research subject
Production Technology
Identifiers
URN: urn:nbn:se:hv:diva-10500OAI: oai:DiVA.org:hv-10500DiVA: diva2:1062956
Available from: 2017-01-09 Created: 2017-01-09 Last updated: 2017-01-09Bibliographically approved

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CiteExportLink to record
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