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Microstructure, sol...
Microstructure, solidification texture, and thermal stability of 316 L stainless steel manufactured by laser powder bed fusion
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- Krakhmalev, Pavel, 1973- (författare)
- Karlstads universitet,Institutionen för ingenjörsvetenskap och fysik (from 2013),Karlstad University, Sweden
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- Fredriksson, Gunnel, 1969- (författare)
- Karlstads universitet,Institutionen för ingenjörsvetenskap och fysik (from 2013),Karlstad University, Sweden
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- Svensson, Krister, 1969- (författare)
- Karlstads universitet,Institutionen för ingenjörsvetenskap och fysik (from 2013),Karlstad University, Sweden
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- Yadroitsev, Igor (författare)
- Bloemfontein Cent Univ Technol South Africa,Central University of Technology, South Africa
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- Yadroitsava, Ina (författare)
- Bloemfontein Cent Univ Technol South Africa,Central University of Technology, South Africa
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- Thuvander, Mattias, 1968 (författare)
- Chalmers University of Technology, Gothenburg,Chalmers tekniska högskola
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- Peng, Ru Lin, 1960- (författare)
- Linköpings universitet,Konstruktionsmaterial,Tekniska fakulteten,Linköping University
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(creator_code:org_t)
- 2018-08-15
- 2018
- Engelska.
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Ingår i: Metals. - : MDPI AG. - 2075-4701. ; 8:8, s. 1-18
- Relaterad länk:
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https://doi.org/10.3...
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Abstract
Ämnesord
Stäng
- This article overviews the scientific results of the microstructural features observed in 316 L stainless steel manufactured by the laser powder bed fusion (LPBF) method obtained by the authors, and discusses the results with respect to the recently published literature. Microscopic features of the LPBF microstructure, i.e., epitaxial nucleation, cellular structure, microsegregation, porosity, competitive colony growth, and solidification texture, were experimentally studied by scanning and transmission electron microscopy, diffraction methods, and atom probe tomography. The influence of laser power and laser scanning speed on the microstructure was discussed in the perspective of governing the microstructure by controlling the process parameters. It was shown that the three-dimensional (3D) zig-zag solidification texture observed in the LPBF 316 L was related to the laser scanning strategy. The thermal stability of the microstructure was investigated under isothermal annealing conditions. It was shown that the cells formed at solidification started to disappear at about 800 °C, and that this process leads to a substantial decrease in hardness. Colony boundaries, nevertheless, were quite stable, and no significant grain growth was observed after heat treatment at 1050 °C. The observed experimental results are discussed with respect to the fundamental knowledge of the solidification processes, and compared with the existing literature data.
Ämnesord
- TEKNIK OCH TEKNOLOGIER -- Materialteknik (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Materials Engineering (hsv//eng)
- TEKNIK OCH TEKNOLOGIER -- Materialteknik -- Keramteknik (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Materials Engineering -- Ceramics (hsv//eng)
- TEKNIK OCH TEKNOLOGIER -- Materialteknik -- Bearbetnings-, yt- och fogningsteknik (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Materials Engineering -- Manufacturing, Surface and Joining Technology (hsv//eng)
- TEKNIK OCH TEKNOLOGIER -- Materialteknik -- Metallurgi och metalliska material (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Materials Engineering -- Metallurgy and Metallic Materials (hsv//eng)
Nyckelord
- 316 L stainless steel
- Cellular solidification
- Electron microscopy
- Laser powder bed fusion
- Solidification texture
- Thermal stability of microstructure
- Materials Engineering
- Materialteknik
Publikations- och innehållstyp
- ref (ämneskategori)
- art (ämneskategori)
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