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Investigation of the Effect of Short Exposure in the Temperature Range of 750-950 degrees C on the Ductility of Haynes (R) 282 (R) by Advanced Microstructural Characterization
Chalmers Univ Technol, Dept Ind & Mat Sci, Gothenburg, Sweden.
Univ Manitoba, Dept Mech Engn, Winnipeg, MB R3T 5V6, Canada.
GKN Aerosp Sweden AB, S-46138 Trollhattan, Sweden.
Univ Manitoba, Dept Mech Engn, Winnipeg, MB R3T 5V6, Canada.
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2019 (English)In: Metals, E-ISSN 2075-4701, Vol. 9, no 12, article id 1357Article in journal (Refereed) Published
Abstract [en]

A Gleeble-based test method has been developed to study the change in the ductility signature of Haynes (R) 282 (R) during isothermal exposure from 5 s to 1800 s. A temperature range of 750 to 950 degrees 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 (gamma’) 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 gamma’ and development of a grain boundary carbide network. A ductility minimum is observed at 800-850 degrees 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 (R) 282 (R).

Place, publisher, year, edition, pages
MDPI , 2019. Vol. 9, no 12, article id 1357
Keywords [en]
nickel-based superalloy; haynes 282; strain-age cracking
National Category
Metallurgy and Metallic Materials Other Materials Engineering Manufacturing, Surface and Joining Technology
Research subject
ENGINEERING, Manufacturing and materials engineering
Identifiers
URN: urn:nbn:se:hv:diva-14923DOI: 10.3390/met9121357ISI: 000506637800117Scopus ID: 2-s2.0-85078045524OAI: oai:DiVA.org:hv-14923DiVA, id: diva2:1390968
Note

Funding: Consortium Material Technology for Thermal Energy Processes (KME)

Available from: 2020-02-03 Created: 2020-02-03 Last updated: 2020-02-22

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Andersson, Joel

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