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Temperature study o...
Temperature study of deformation twinning behaviour in Nickel-base Superalloy 625
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- Nordström, Joakim, 1971- (author)
- Linköpings universitet,Konstruktionsmaterial,Tekniska fakulteten,Alleima AB, Sweden
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- Dong, Zhihua (author)
- Department of Materials Science and Engineering, KTH, Sweden; Material Science and Engineering, Chongqing University, China
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- Lautrup, Lisa (author)
- Alleima AB, Sweden
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- Siriki, Raveendra (author)
- Alleima AB, Sweden
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- Vitos, Levente (author)
- Department of Materials Science and Engineering, KTH, Sweden
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- Moverare, Johan, Professor, 1973- (author)
- Linköpings universitet,Konstruktionsmaterial,Tekniska fakulteten
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- Calmunger, Mattias, Professor, 1986- (author)
- Linköpings universitet,Konstruktionsmaterial,Tekniska fakulteten
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- Chai, Guocai, 1956- (author)
- Linköpings universitet,Konstruktionsmaterial,Tekniska fakulteten,Alleima AB, Sweden
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(creator_code:org_t)
- 2024
- 2024
- English.
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In: Materials Science & Engineering. - 0921-5093 .- 1873-4936.
- Related links:
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https://doi.org/10.1...
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https://urn.kb.se/re...
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Abstract
Subject headings
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- Deformation behaviour in the Nickel-base superalloy 625 has been studied by tensile testing at four temperatures: 295, 223, 173 and 77 K. The microstructure has been investigated using TEM, FIB-SEM, EBSD and ECCI techniques. Deformation in the alloy turns out to be a competitive course of events between at least two deformation mechanisms, namely dislocation slip and deformation twinning. Slip is the predominant deformation mechanism at higher temperatures. While at 77 K, deformation induced twinning gives an extra degree of freedom as one of the main deformation mechanisms, i.e., the material shows a twin induced plasticity, TWIP, behaviour. Ab initio calculations indicate that the influence of cryogenic/sub-zero temperatures on the stacking fault energy of this alloy can be limited and that the formation of deformation twins cannot be determined solely by the stacking fault energy. The results implies that it is the critical strain and strain hardening rate that influences the deformation twinning onset and twinning rate.
Subject headings
- TEKNIK OCH TEKNOLOGIER -- Materialteknik -- Metallurgi och metalliska material (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Materials Engineering -- Metallurgy and Metallic Materials (hsv//eng)
Keyword
- Ni-base alloy
- Superalloy
- Deformation induced twinning
- Density function theory
- Stacking fault energy
Publication and Content Type
- ref (subject category)
- art (subject category)
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Nordström, Joaki ...
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Dong, Zhihua
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Lautrup, Lisa
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Siriki, Raveendr ...
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Vitos, Levente
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Moverare, Johan, ...
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Calmunger, Matti ...
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Chai, Guocai, 19 ...
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- ENGINEERING AND TECHNOLOGY
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ENGINEERING AND ...
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and Materials Engine ...
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and Metallurgy and M ...
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Materials Scienc ...
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Linköping University