Hosseini, Faezeh, Asad, Asad et Yakout, Mostafa.
2025.
« Effect of laser powder bed fusion process parameters on microstructure and coefficient of thermal expansion of Al6061 ».
In Proceedings of the CSME-CFDSC-CSR 2025 International Congress (Montreal, QC, Canada, May 25-28, 2025)
Coll. « Progress in Canadian Mechanical Engineering », vol. 8.
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Résumé
High-performance aluminum (Al) alloys, including the 6xxx and 7xxx series, are considered promising materials for energy, aerospace, automotive, and defense applications. In this work, the laser powder bed fusion (L-PBF) technique was employed to fabricate Al6061. An optimized processing window for L-PBF was established to fabricate Al6061 with relative densities exceeding 99%, using a laser power range of 200-250 W, a scanning speed of 1000 mm/s, and a hatch spacing of 140 µm. This process resulted in complete melting within the energy density range of 44-50 J/mm3. Additionally, thermal expansion and average linear coefficient of thermal expansion (CTE) analyses revealed that parts produced at energy densities below 44.64-50 J/mm3 exhibited lower CTE, likely due to void formation in the lack of fusion mode. Similarly, higher energy densities (69.44 and 104.16 J/mm3) also caused a decrease in CTE, attributed to phase transformations and keyhole formation.
| Type de document: | Compte rendu de conférence |
|---|---|
| Éditeurs: | Éditeurs ORCID Hof, Lucas A. NON SPÉCIFIÉ Di Labbio, Giuseppe NON SPÉCIFIÉ Tahan, Antoine NON SPÉCIFIÉ Sanjosé, Marlène NON SPÉCIFIÉ Lalonde, Sébastien NON SPÉCIFIÉ Demarquette, Nicole R. NON SPÉCIFIÉ |
| Date de dépôt: | 18 déc. 2025 15:11 |
| Dernière modification: | 18 déc. 2025 15:11 |
| URI: | https://espace2.etsmtl.ca/id/eprint/32414 |
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