Tusher, Mehide et Ince, Ayhan.
2025.
« Very high cycle fatigue behavior of AlSi7Mg alloy: effects of powder condition in laser powder bed fusion ».
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
The recyclability of metal powders in Laser Powder Bed Fusion (L-PBF) processes is crucial for both economic and environmental sustainability in additive manufacturing. This study investigates the influence of powder recycling and subsequent heat treatment of the recycled powder on the very high cycle fatigue performance and defect characteristics of L-PBF-manufactured AlSi7Mg components. CT analysis revealed comparable total defect counts between new powder and recycled powder specimens, with recycled powder showing fewer surface defects but slightly higher internal defects. Both specimens exhibited almost identical spatial distributions of defects, with new powder demonstrating marginally better sphericity. Specimens fabricated from recycled powder exhibited the highest fatigue performance across all stress levels. Those fabricated from new powder performed better than those using heated recycled powder but were still outperformed by recycled powder. Specimens fabricated with heated recycled powder demonstrated the lowest fatigue performance. The improved fatigue performance of recycled powder despite slightly lower defect sphericity suggests that beyond powder condition and defects count, other factors such as microstructural characteristics, defect position and alignment, oxidation state, particle size distribution, and loading frequency play significant roles in determining fatigue behavior. These findings provide insights into the effects of powder condition on the fatigue performance of L-PBF AlSi7Mg components, highlighting the complex interplay of various factors affecting material behavior in very high cycle fatigue conditions.
| 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 15:33 |
| Dernière modification: | 18 déc. 2025 15:33 |
| URI: | https://espace2.etsmtl.ca/id/eprint/32518 |
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