dc.contributor.author | Tucho, Wakshum Mekonnen | |
dc.contributor.author | Hansen, Vidar Folke | |
dc.date.accessioned | 2021-06-08T08:01:16Z | |
dc.date.available | 2021-06-08T08:01:16Z | |
dc.date.created | 2021-05-20T14:18:14Z | |
dc.date.issued | 2021-02 | |
dc.identifier.citation | Tucho, W.M., Hansen, V.F. (2021) Studies of Post-Fabrication Heat Treatment of L-PBF-Inconel 718: Effects of Hold Time on Microstructure, Annealing Twins, and Hardness. Metals, 11 (2), 1-20. | en_US |
dc.identifier.issn | 2075-4701 | |
dc.identifier.uri | https://hdl.handle.net/11250/2758434 | |
dc.description.abstract | The widely adopted temperature for solid solution heat treatment (ST) for the conventionally fabricated Inconel 718 is 1100 °C for a hold time of 1 h or less. This ST scheme is, however, not enough to dissolve Laves and annihilate dislocations completely in samples fabricated with Laser metal powder bed fusion (L-PBF) additive manufacturing (AM)-Inconel 718. Despite this, the highest hardness obtained after aging for ST temperatures (970–1250 °C) is at 1100 °C/1 as we have ascertained in our previous studies. The unreleased residual stresses in the retained lattice defects potentially affect other properties of the material. Hence, this work aims to investigate if a longer hold time of ST at 1100 °C will lead to complete recrystallization while maintaining the hardness after aging or not. For this study, L-PBF-Inconel 718 samples were ST at 1100 °C at various hold times (1, 3, 6, 9, 16, or 24 h) and aged to study the effects on microstructure and hardness. In addition, a sample was directly aged to study the effects of bypassing ST. The samples (ST and aged) gain hardness by 43–49%. The high density of annealing twins evolved during 3 h of ST and only slightly varies for longer ST. | en_US |
dc.language.iso | eng | en_US |
dc.publisher | MDPI | en_US |
dc.rights | Navngivelse 4.0 Internasjonal | * |
dc.rights.uri | http://creativecommons.org/licenses/by/4.0/deed.no | * |
dc.title | Studies of Post-Fabrication Heat Treatment of L-PBF-Inconel 718: Effects of Hold Time on Microstructure, Annealing Twins, and Hardness | en_US |
dc.type | Peer reviewed | en_US |
dc.type | Journal article | en_US |
dc.description.version | publishedVersion | en_US |
dc.rights.holder | Copyright: © 2021 by the authors | en_US |
dc.subject.nsi | VDP::Teknologi: 500 | en_US |
dc.source.pagenumber | 1-20 | en_US |
dc.source.volume | 11 | en_US |
dc.source.journal | Metals | en_US |
dc.source.issue | 2 | en_US |
dc.identifier.doi | 10.3390/met11020266 | |
dc.identifier.cristin | 1911090 | |
cristin.ispublished | true | |
cristin.fulltext | original | |
cristin.qualitycode | 1 | |