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Thin-wall Effects a...
Thin-wall Effects and Anisotropic Deformation Mechanisms of an Additively Manufactured Ni-based Superalloy
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- Yu, Cheng-Han, 1992- (författare)
- Linköpings universitet,Konstruktionsmaterial,Tekniska fakulteten
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- Peng, Ru Lin, 1960- (författare)
- Linköpings universitet,Konstruktionsmaterial,Tekniska fakulteten
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- Luzin, Vladimir (författare)
- ANSTO Australian Nuclear Science and Technology Organization, Australia
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- Sprengel, Maximilian (författare)
- Bundesanstalt für Materialforschung and -prüfung (BAM), Berlin, Germany
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- Calmunger, Mattias, 1986- (författare)
- Linköpings universitet,Konstruktionsmaterial,Tekniska fakulteten
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- Lundgren, Jan-Erik (författare)
- Siemens Energy AB, Finspång, Sweden
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- Brodin, Håkan (författare)
- Siemens Energy AB, Finspång, Sweden
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- Kromm, Arne (författare)
- Bundesanstalt für Materialforschung and -prüfung (BAM), Berlin, Germany
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- Moverare, Johan, 1973- (författare)
- Linköpings universitet,Konstruktionsmaterial,Tekniska fakulteten
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(creator_code:org_t)
- Elsevier, 2020
- 2020
- Engelska.
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Ingår i: Additive Manufacturing. - : Elsevier. - 2214-8604 .- 2214-7810. ; 36
- Relaterad länk:
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https://doi.org/10.1...
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https://urn.kb.se/re...
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https://doi.org/10.1...
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Abstract
Ämnesord
Stäng
- Laser powder bed fusion (LPBF) of Ni-based superalloys shows great potential for high temperature applications, for example, as a burner repair application for gas turbines where the thin-walled structure is important. It motivates this work to investigate the evolution of microstructure and the anisotropic mechanical behavior when plate-like specimens are built with a thickness from 4 mm down to 1 mm. By performing texture analysis using neutron diffraction, a clear transition in fiber texture from <011> to <001> is indicated when the specimen becomes thinner. The residual stress shows no thickness dependence, and at the subsurface the residual stress reaches the same level as the yield strength. Due to the rough as-built surface, a roughness compensation method for mechanical properties of thin-walled structures is outlined and demonstrated. Tensile tests from room temperature up to 700 °C have been carried out. Anisotropic mechanical behavior is found at all temperatures, which is strongly related to the anisotropic texture evolution. Stronger texture evolution and grain rotations are discovered when the tensile loading is applied along the building direction. The mechanical behavior has been compared to a wrought material, where the high dislocation density and the subgrain structure of the LPBF material result in a higher yield strength. Combining the statistical texture analysis by neutron diffraction with mechanical testing, EBSD grain orientation mapping and the investigation of dislocation structures using transmission electron microscopy, this work illustrates the significance of texture for the thin-wall effect and anisotropic mechanical behavior of LPBF materials.
Ämnesord
- TEKNIK OCH TEKNOLOGIER -- Materialteknik (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Materials Engineering (hsv//eng)
Nyckelord
- Hastelloy X; Hot tensile test; Crystallographic texture
- roughness; Residual stress; Dislocation density
Publikations- och innehållstyp
- ref (ämneskategori)
- art (ämneskategori)
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Till lärosätets databas
- Av författaren/redakt...
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Yu, Cheng-Han, 1 ...
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Peng, Ru Lin, 19 ...
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Luzin, Vladimir
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Sprengel, Maximi ...
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Calmunger, Matti ...
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Lundgren, Jan-Er ...
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visa fler...
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Brodin, Håkan
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Kromm, Arne
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Moverare, Johan, ...
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- Om ämnet
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- TEKNIK OCH TEKNOLOGIER
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TEKNIK OCH TEKNO ...
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och Materialteknik
- Artiklar i publikationen
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Additive Manufac ...
- Av lärosätet
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Linköpings universitet