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Influence of laser ...
Influence of laser powder bed fusion scanning pattern on residual stress and microstructure of alloy 718
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- Čapek, J. (författare)
- Paul Scherrer Institute, Switzerland,Laboratory for Neutron Scattering and Imaging, Paul Scherrer Institute, CH-5232 Villigen (CHE)
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- Polatidis, E. (författare)
- Paul Scherrer Institute, Switzerland,Laboratory for Neutron Scattering and Imaging, Paul Scherrer Institute, CH-5232 Villigen (CHE)
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- Casati, N. (författare)
- Paul Scherrer Institute, Switzerland,Materials Science Group, Photon Science Division, Paul Scherrer Institute, 5232 Villigen (CHE)
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- Pederson, Robert, 1973- (författare)
- Högskolan Väst,Avdelningen för avverkande och additativa tillverkningsprocesser (AAT),PTW
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- Lyphout, Christophe (författare)
- RISE,Tillverkningsprocesser,epartment of Manufacturing, RISE IVF AB, Mölndal (SWE)
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- Strobl, M. (författare)
- Paul Scherrer Institute, Switzerland,Laboratory for Neutron Scattering and Imaging, Paul Scherrer Institute, CH-5232 Villigen (CHE)
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(creator_code:org_t)
- Elsevier Ltd, 2022
- 2022
- Engelska.
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Ingår i: Materials & design. - : Elsevier Ltd. - 0264-1275 .- 1873-4197. ; 221
- Relaterad länk:
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https://doi.org/10.1...
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https://hv.diva-port... (primary) (Raw object)
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https://urn.kb.se/re...
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https://doi.org/10.1...
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https://urn.kb.se/re...
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Abstract
Ämnesord
Stäng
- A comprehensive investigation is undertaken on the effect of laser scanning pattern on the microstructure of cylindrical samples made of Alloy 718 processed by Laser Powder Bed Fusion. It is observed that the common alternate direction scanning of the laser results in a more homogeneous microstructure than the less common concentric line scans where significant microstructural heterogeneities are seen between the edges and the center of the sample. The investigation focuses on the precipitation, crystallographic texture, grain size, grain morphology and residual stresses utilizing synchrotron X-ray diffraction, neutron diffraction and electron microscopy. The heterogeneous microstructure of the sample processed with the concentric laser pattern influences the chemical composition of the matrix, which alters the reference “strain free” interplanar spacing used for evaluating the residual strain. The investigation underlines the significance of the processing parameters on the homogeneity of the microstructure and the effect of the chemical variations on the determination of residual stresses in materials such as Alloy 718, where strong local chemical variations occur because of different types and extent of precipitation. © 2022
Ämnesord
- NATURVETENSKAP -- Fysik -- Den kondenserade materiens fysik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Condensed Matter Physics (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
- Laser pattern
- Microstructure
- Residual stress
- Selective laser melting
- Superalloys
- Morphology
- Neutron diffraction
- Precipitation (chemical)
- Scanning
- Textures
- Alloy 718
- Chemical variations
- Cylindrical samples
- Homogeneous microstructure
- Laser powders
- Laser scanning
- Line scan
- Powder bed
- Residual stresses
- Production Technology
Publikations- och innehållstyp
- ref (ämneskategori)
- art (ämneskategori)
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