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Effect of Short-Term Isothermal Exposure on the Ductility Signature of Waspaloy in the Temperature Range of 750–950 °C: A Comparison with Haynes® 282®
University West, Department of Engineering Science, Division of Subtractive and Additive Manufacturing. (KAMPT)ORCID iD: 0000-0002-1607-9177
Manitoba Institute for Materials, University of Manitoba, Winnipeg, MB (CAN); Department of Mechanical Engineering, University of Manitoba, Winnipeg (CAN).
Department of Mechanical Engineering, University of Manitoba, Winnipeg (CAN).
University West, Department of Engineering Science, Division of Welding Technology. (KAMPT)ORCID iD: 0000-0001-9065-0741
2023 (English)In: Proceedings of the 10th International Symposium on Superalloy 718 and Derivatives: TMS 2023 / [ed] Eric Ott och Zhongnan Bi, Springer Nature, 2023, p. 197-210Conference paper, Published paper (Refereed)
Abstract [en]

The evolution of microstructure and ductility has been investigated for Waspaloy after isothermal exposure between 5 and 1800s at 750–950 °C. Gamma prime (γ’) with 1.7 nm diameter is found in the mill-annealed condition, while precipitate-growth following a t1/3 relationship is observed for isothermal exposure. Grain boundary carbide networks are formed during isothermal exposure together with a rapid hardness increase. A drop in ductility is observed with the lowest values at 750 and 800 °C. Further ductility reduction during isothermal exposure correlates with the rapid hardness increase of Waspaloy. While grain boundary strengthening can compensate for the moderate age hardening observed for Haynes® 282®, the more rapid hardness increase due to γ' precipitation appears to be the dominating effect on ductility in Waspaloy. Carbide precipitation and growth kinetics are slower than those of Haynes® 282®, which further increases the relative effect of age hardening reactions on the ductility of Waspaloy.

Place, publisher, year, edition, pages
Springer Nature, 2023. p. 197-210
Series
The Minerals, Metals & Materials Series
Keywords [en]
Nickel-based superalloy, Waspaloy, Haynes 282, Strain age cracking, Postweld heat treatment, Gleeble
National Category
Manufacturing, Surface and Joining Technology
Research subject
Production Technology
Identifiers
URN: urn:nbn:se:hv:diva-20033DOI: 10.1007/978-3-031-27447-3_13Scopus ID: 2-s2.0-85161442871ISBN: 978-3-031-27446-6 (print)ISBN: 978-3-031-27447-3 (electronic)OAI: oai:DiVA.org:hv-20033DiVA, id: diva2:1762909
Conference
The 10th International Symposium on Superalloy 718 and Derivatives, May 14-17, Pittsburgh, USA
Note

The support by the Consortium Materials Technology for Thermal Energy Processes (KME) through funding from Swedish Energy Agency and GKN Aerospace Sweden AB is highly appreciated

Available from: 2023-06-05 Created: 2023-06-05 Last updated: 2024-01-05Bibliographically approved

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Hanning, FabianAndersson, Joel

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