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Open AccessArticle

Investigation of the Effect of Short Exposure in the Temperature Range of 750–950 °C on the Ductility of Haynes® 282® by Advanced Microstructural Characterization

1
Department of Industrial and Materials Science, Chalmers University of Technology, 412 96 Gothenburg, Sweden
2
Manitoba Institute for Materials, University of Manitoba, Winnipeg, MB R3T 5V6, Canada
3
Department of Mechanical Engineering, University of Manitoba, Winnipeg, MB R3T 5V6, Canada
4
GKN Aerospace Sweden AB, 461 38 Trollhättan, Sweden
5
Department of Engineering Science, University West, 461 32 Trollhättan, Sweden
*
Author to whom correspondence should be addressed.
Metals 2019, 9(12), 1357; https://doi.org/10.3390/met9121357
Received: 13 November 2019 / Revised: 11 December 2019 / Accepted: 13 December 2019 / Published: 17 December 2019
(This article belongs to the Special Issue Welding Metallurgy and Weldability of Superalloys)
A Gleeble-based test method has been developed to study the change in the ductility signature of Haynes® 282® during isothermal exposure from 5 s to 1800 s. A temperature range of 750 to 950 °C has been used to investigate the effect of age-hardening reactions. Microstructural constituents have been analyzed and quantified using scanning and transmission electron microscopy. Carbides present in the material are identified as primary MC-type TiC carbides, Mo-rich M6C secondary carbides, and Cr-rich M23C6 secondary carbides. Gamma prime (γ′) precipitates are present in all the material conditions with particle sizes ranging from 2.5 nm to 58 nm. Isothermal exposure causes the growth of γ′ and development of a grain boundary carbide network. A ductility minimum is observed at 800–850 °C. The fracture mode is found to be dependent on the stroke rate, where a transition toward intergranular fracture is observed for stroke rates below 0.055 mm/s. Intergranular fracture is characterized by microvoids present on grain facets, while ductility did not change during ongoing age-hardening reactions for intergranularly fractured Haynes® 282®. View Full-Text
Keywords: nickel-based superalloy; haynes 282; strain-age cracking nickel-based superalloy; haynes 282; strain-age cracking
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MDPI and ACS Style

Hanning, F.; Khan, A.K.; Steffenburg-Nordenström, J.; Ojo, O.; Andersson, J. Investigation of the Effect of Short Exposure in the Temperature Range of 750–950 °C on the Ductility of Haynes® 282® by Advanced Microstructural Characterization. Metals 2019, 9, 1357. https://doi.org/10.3390/met9121357

AMA Style

Hanning F, Khan AK, Steffenburg-Nordenström J, Ojo O, Andersson J. Investigation of the Effect of Short Exposure in the Temperature Range of 750–950 °C on the Ductility of Haynes® 282® by Advanced Microstructural Characterization. Metals. 2019; 9(12):1357. https://doi.org/10.3390/met9121357

Chicago/Turabian Style

Hanning, Fabian; Khan, Abdul K.; Steffenburg-Nordenström, Joachim; Ojo, Olanrewaju; Andersson, Joel. 2019. "Investigation of the Effect of Short Exposure in the Temperature Range of 750–950 °C on the Ductility of Haynes® 282® by Advanced Microstructural Characterization" Metals 9, no. 12: 1357. https://doi.org/10.3390/met9121357

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