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Meta-Dynamic Recrys...
Meta-Dynamic Recrystallization in the Ni-Based Superalloy Haynes 282
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- Eriksson, Emil, 1990 (författare)
- Chalmers tekniska högskola,Chalmers University of Technology,Department of Physics, Chalmers University of Technology, Gothenburg (SWE)
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- Hanning, Fabian, 1988 (författare)
- Högskolan Väst,Avdelningen för avverkande och additativa tillverkningsprocesser (AAT),KAMPT,University West
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- Andersson, Joel Håkan, 1981 (författare)
- Högskolan Väst,Avdelningen för svetsteknologi (SV),KAMPT,University West
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- Hörnqvist Colliander, Magnus, 1979 (författare)
- Chalmers tekniska högskola,Chalmers University of Technology,Department of Physics, Chalmers University of Technology, Gothenburg (SWE)
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(creator_code:org_t)
- MDPI, 2023
- 2023
- Engelska.
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Ingår i: Metals. - : MDPI. - 2075-4701. ; 13:8
- Relaterad länk:
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https://doi.org/10.3...
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https://doi.org/10.3...
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Abstract
Ämnesord
Stäng
- 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.
Ämnesord
- 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)
Nyckelord
- EBSD
- Ni-based superalloys
- meta-dynamic recrystallization
- hot deformation
- Production Technology
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