Influence of laser powder bed fusion process parameters on the microstructure and cracking susceptibility of nickel-based superalloy Alloy 247LC
Microstructures of material conditions of nickel-based superalloy Alloy 247LC fabricated using laser powder bed fusion (L-PBF) were investigated. Experiments designed in a prior study revealed the L-PBF process parameters for which the material conditions displayed a reduced susceptibility to cracki...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
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Elsevier
2022-03-01
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| Series: | Results in Materials |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S2590048X22000048 |
| _version_ | 1818158049961967616 |
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| author | Olutayo Adegoke Joel Andersson Håkan Brodin Robert Pederson Peter Harlin |
| author_facet | Olutayo Adegoke Joel Andersson Håkan Brodin Robert Pederson Peter Harlin |
| author_sort | Olutayo Adegoke |
| collection | DOAJ |
| description | Microstructures of material conditions of nickel-based superalloy Alloy 247LC fabricated using laser powder bed fusion (L-PBF) were investigated. Experiments designed in a prior study revealed the L-PBF process parameters for which the material conditions displayed a reduced susceptibility to cracking. Certain process parameters produced material conditions with an increased susceptibility to cracking. In this study, the material conditions were investigated in detail to reveal their microstructure and to determine the cause of cracking. The reason for the transition between a reduced to an increased susceptibility to cracking was examined. The results revealed solidification cracking occurred at high-angle grain boundaries. Solidification cracking may have been promoted at high-angle grain boundaries because of the undercooling contribution of the grain boundary energy. Furthermore, Si segregation was observed in the cracks. Thus, the presence of Si most likely promoted solidification cracking. It was observed that a high crack density, which occurred in the high energy density material condition, was associated with a large average grain size. The fact that certain combination of process parameters produced microstructures with a low susceptibility to cracking, indicates that reliable Alloy 247LC material may be printed using L-PBF by employing improved process parameters. |
| first_indexed | 2024-12-11T15:23:55Z |
| format | Article |
| id | doaj.art-8281afcc3ac148659ae317be324955e7 |
| institution | Directory Open Access Journal |
| issn | 2590-048X |
| language | English |
| last_indexed | 2024-12-11T15:23:55Z |
| publishDate | 2022-03-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Results in Materials |
| spelling | doaj.art-8281afcc3ac148659ae317be324955e72022-12-22T01:00:16ZengElsevierResults in Materials2590-048X2022-03-0113100256Influence of laser powder bed fusion process parameters on the microstructure and cracking susceptibility of nickel-based superalloy Alloy 247LCOlutayo Adegoke0Joel Andersson1Håkan Brodin2Robert Pederson3Peter Harlin4Department of Engineering Science, University West, 461 86, Trollhättan, Sweden; Corresponding author.Department of Engineering Science, University West, 461 86, Trollhättan, SwedenSiemens Industrial Turbomachinery, 612 83, Finspång, SwedenDepartment of Engineering Science, University West, 461 86, Trollhättan, SwedenDepartment of Engineering Science, University West, 461 86, Trollhättan, Sweden; Sandvik Additive Manufacturing, Sandviken, SwedenMicrostructures of material conditions of nickel-based superalloy Alloy 247LC fabricated using laser powder bed fusion (L-PBF) were investigated. Experiments designed in a prior study revealed the L-PBF process parameters for which the material conditions displayed a reduced susceptibility to cracking. Certain process parameters produced material conditions with an increased susceptibility to cracking. In this study, the material conditions were investigated in detail to reveal their microstructure and to determine the cause of cracking. The reason for the transition between a reduced to an increased susceptibility to cracking was examined. The results revealed solidification cracking occurred at high-angle grain boundaries. Solidification cracking may have been promoted at high-angle grain boundaries because of the undercooling contribution of the grain boundary energy. Furthermore, Si segregation was observed in the cracks. Thus, the presence of Si most likely promoted solidification cracking. It was observed that a high crack density, which occurred in the high energy density material condition, was associated with a large average grain size. The fact that certain combination of process parameters produced microstructures with a low susceptibility to cracking, indicates that reliable Alloy 247LC material may be printed using L-PBF by employing improved process parameters.http://www.sciencedirect.com/science/article/pii/S2590048X22000048Alloy 247LCNickel-based superalloySolidification crackingPoreLaser powder bed fusionProcess parameters |
| spellingShingle | Olutayo Adegoke Joel Andersson Håkan Brodin Robert Pederson Peter Harlin Influence of laser powder bed fusion process parameters on the microstructure and cracking susceptibility of nickel-based superalloy Alloy 247LC Results in Materials Alloy 247LC Nickel-based superalloy Solidification cracking Pore Laser powder bed fusion Process parameters |
| title | Influence of laser powder bed fusion process parameters on the microstructure and cracking susceptibility of nickel-based superalloy Alloy 247LC |
| title_full | Influence of laser powder bed fusion process parameters on the microstructure and cracking susceptibility of nickel-based superalloy Alloy 247LC |
| title_fullStr | Influence of laser powder bed fusion process parameters on the microstructure and cracking susceptibility of nickel-based superalloy Alloy 247LC |
| title_full_unstemmed | Influence of laser powder bed fusion process parameters on the microstructure and cracking susceptibility of nickel-based superalloy Alloy 247LC |
| title_short | Influence of laser powder bed fusion process parameters on the microstructure and cracking susceptibility of nickel-based superalloy Alloy 247LC |
| title_sort | influence of laser powder bed fusion process parameters on the microstructure and cracking susceptibility of nickel based superalloy alloy 247lc |
| topic | Alloy 247LC Nickel-based superalloy Solidification cracking Pore Laser powder bed fusion Process parameters |
| url | http://www.sciencedirect.com/science/article/pii/S2590048X22000048 |
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