Effect of layer thickness, and laser energy density on the recrystallization behavior of additively manufactured Hastelloy X by laser powder bed fusion
A single-phase Ni-superalloy (Hastelloy X) was fabricated by laser powder bed fusion (L-PBF) using different layer-thicknesses (i.e., 40, 60, 80, and 120 µm), by implementing different optimized volumetric laser energy densities (i.e., VED of 67, 44, 31, and 35 J/mm3). As-built (AB) microstructure,...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
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Elsevier
2023-12-01
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| Series: | Additive Manufacturing Letters |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S2772369023000622 |
| _version_ | 1827766926103805952 |
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| author | Faraz Deirmina Olutayo Adegoke Matteo Del Col Massimo Pellizzari |
| author_facet | Faraz Deirmina Olutayo Adegoke Matteo Del Col Massimo Pellizzari |
| author_sort | Faraz Deirmina |
| collection | DOAJ |
| description | A single-phase Ni-superalloy (Hastelloy X) was fabricated by laser powder bed fusion (L-PBF) using different layer-thicknesses (i.e., 40, 60, 80, and 120 µm), by implementing different optimized volumetric laser energy densities (i.e., VED of 67, 44, 31, and 35 J/mm3). As-built (AB) microstructure, grain morphology, and the recrystallization kinetics were systematically dependent on VED which generally decreases by increasing layer thickness. An increased VED led to a columnar grain morphology, strong texture, large lattice micro-strain, high fraction of low angle boundaries, and increased yield strength. Electron back scattered diffraction (EBSD) analysis revealed that also the recrystallization kinetics was significantly dependent on VED. By decreasing the VED, recrystallization was largely suppressed because of the lower dislocation density in the AB state. A processing map to study the recrystallization as a function of VED, and solution annealing temperature is proposed. |
| first_indexed | 2024-03-11T11:52:03Z |
| format | Article |
| id | doaj.art-91921748e74047929856889c0799986c |
| institution | Directory Open Access Journal |
| issn | 2772-3690 |
| language | English |
| last_indexed | 2024-03-11T11:52:03Z |
| publishDate | 2023-12-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Additive Manufacturing Letters |
| spelling | doaj.art-91921748e74047929856889c0799986c2023-11-09T04:12:13ZengElsevierAdditive Manufacturing Letters2772-36902023-12-017100182Effect of layer thickness, and laser energy density on the recrystallization behavior of additively manufactured Hastelloy X by laser powder bed fusionFaraz Deirmina0Olutayo Adegoke1Matteo Del Col2Massimo Pellizzari3Siemens Energy AB, Finspång, SwedenSiemens Energy AB, Finspång, SwedenDepartment of Industrial Engineering, University of Trento, Via Sommarive 9, Trento 38123, ItalyDepartment of Industrial Engineering, University of Trento, Via Sommarive 9, Trento 38123, Italy; Corresponding author.A single-phase Ni-superalloy (Hastelloy X) was fabricated by laser powder bed fusion (L-PBF) using different layer-thicknesses (i.e., 40, 60, 80, and 120 µm), by implementing different optimized volumetric laser energy densities (i.e., VED of 67, 44, 31, and 35 J/mm3). As-built (AB) microstructure, grain morphology, and the recrystallization kinetics were systematically dependent on VED which generally decreases by increasing layer thickness. An increased VED led to a columnar grain morphology, strong texture, large lattice micro-strain, high fraction of low angle boundaries, and increased yield strength. Electron back scattered diffraction (EBSD) analysis revealed that also the recrystallization kinetics was significantly dependent on VED. By decreasing the VED, recrystallization was largely suppressed because of the lower dislocation density in the AB state. A processing map to study the recrystallization as a function of VED, and solution annealing temperature is proposed.http://www.sciencedirect.com/science/article/pii/S2772369023000622Ni-superalloyL-PBF, EBSDLaser energy densityRecrystallization |
| spellingShingle | Faraz Deirmina Olutayo Adegoke Matteo Del Col Massimo Pellizzari Effect of layer thickness, and laser energy density on the recrystallization behavior of additively manufactured Hastelloy X by laser powder bed fusion Additive Manufacturing Letters Ni-superalloy L-PBF, EBSD Laser energy density Recrystallization |
| title | Effect of layer thickness, and laser energy density on the recrystallization behavior of additively manufactured Hastelloy X by laser powder bed fusion |
| title_full | Effect of layer thickness, and laser energy density on the recrystallization behavior of additively manufactured Hastelloy X by laser powder bed fusion |
| title_fullStr | Effect of layer thickness, and laser energy density on the recrystallization behavior of additively manufactured Hastelloy X by laser powder bed fusion |
| title_full_unstemmed | Effect of layer thickness, and laser energy density on the recrystallization behavior of additively manufactured Hastelloy X by laser powder bed fusion |
| title_short | Effect of layer thickness, and laser energy density on the recrystallization behavior of additively manufactured Hastelloy X by laser powder bed fusion |
| title_sort | effect of layer thickness and laser energy density on the recrystallization behavior of additively manufactured hastelloy x by laser powder bed fusion |
| topic | Ni-superalloy L-PBF, EBSD Laser energy density Recrystallization |
| url | http://www.sciencedirect.com/science/article/pii/S2772369023000622 |
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