Meta-Dynamic Recrystallization in the Ni-Based Superalloy Haynes 282

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Eriksson, Emil,1990Chalmers tekniska högskola,Chalmers University of Technology,Department of Physics, Chalmers University of Technology, Gothenburg (SWE) (author)

Meta-Dynamic Recrystallization in the Ni-Based Superalloy Haynes 282

Article/chapterEnglish2023

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MDPI,2023
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LIBRIS-ID:oai:research.chalmers.se:85ce94c6-351c-4472-ba75-97b2759a9d42
https://doi.org/10.3390/met13081335DOI
https://research.chalmers.se/publication/537284URI
https://urn.kb.se/resolve?urn=urn:nbn:se:hv:diva-21063URI

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Language:English
Summary in:English

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CC BY 4.0The funding for the present work has been provided by the Swedish Agency for Innovation (VINNOVA) through the Swedish National Aeronautical Research Program (NFFP) grant no. 2017-04863 in collaboration with GKN Aerospace Engine Systems AB.
Forging on an industrial scale often involves slow, size-limited cooling rates or high temperature hold times between, or after, deformation. This enables the dynamic recrystallization (DRX) initiated during forging to further progress under static conditions, a phenomenon called meta-dynamic recrystallization (mDRX). As mDRX will influence the final grain size, and thus properties, it is critical to understand and control it during processing. Here, we study the mDRX evolution in Ni-based superalloy Haynes 282 during post-deformation hold times of up to 120 s at 1080 °C after partial DRX. We find that mDRX is the dominating mechanisms responsible for the microstructure evolution the hold time. The very rapid mDRX kinetics in the initial stages suggest that quench delays (the time between the end of the deformation and the onset of the quenching intended to arrest the microstructure evolution) must be kept well below 1 s in order to allow reliable conclusions to be drawn from post-deformation microstructure investigations. A larger prior strain (larger DRX fraction) leads to faster mDRX kinetics and a larger final grain size. Larger strains leads to earlier impingement of the growing grains, which, in combination with smaller remaining deformed regions into which the grains can grow, limits the maximum size of the mDRX grains. We also note a close correlation between static recovery and stress relaxation during the hold time, whereas no such correlation between mDRX and stress relaxation can be observed.

Subject headings and genre

NATURVETENSKAP Geovetenskap och miljövetenskap Geologi hsv//swe
NATURAL SCIENCES Earth and Related Environmental Sciences Geology hsv//eng
TEKNIK OCH TEKNOLOGIER Materialteknik Metallurgi och metalliska material hsv//swe
ENGINEERING AND TECHNOLOGY Materials Engineering Metallurgy and Metallic Materials hsv//eng
TEKNIK OCH TEKNOLOGIER Materialteknik Bearbetnings-, yt- och fogningsteknik hsv//swe
ENGINEERING AND TECHNOLOGY Materials Engineering Manufacturing, Surface and Joining Technology hsv//eng
EBSD
Ni-based superalloys
meta-dynamic recrystallization
hot deformation
Production Technology

Added entries (persons, corporate bodies, meetings, titles ...)

Hanning, Fabian,1988Högskolan Väst,Avdelningen för avverkande och additativa tillverkningsprocesser (AAT),KAMPT,University West(Swepub:hv)faha0010 (author)
Andersson, Joel Håkan,1981Högskolan Väst,Avdelningen för svetsteknologi (SV),KAMPT,University West(Swepub:hv)joan0056 (author)
Hörnqvist Colliander, Magnus,1979Chalmers tekniska högskola,Chalmers University of Technology,Department of Physics, Chalmers University of Technology, Gothenburg (SWE)(Swepub:cth)magnuh (author)
Chalmers tekniska högskolaDepartment of Physics, Chalmers University of Technology, Gothenburg (SWE) (creator_code:org_t)

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In:Metals: MDPI13:82075-4701

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