Mouret, Thibault, Leclercq, Aurore, Dubois, Patrick K. et Brailovski, Vladimir.
2026.
« Improving surface roughness and printability of LPBF Ti6246 components without affecting their structure, mechanical properties and building rate ».
Metals, vol. 16, nº 1.
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Résumé
Laser powder bed fusion (LPBF) is the best suited technology to manufacture temperature- resistant Ti-6Al-2Sn-4Zr-6Mo parts with complex geometrical features for high-end appli- cations. Improving printing accuracy by reducing the layer thickness (t) generally requires repeating a tedious and time-consuming process optimization routine. To simplify this en- deavour, the present work proposes three process equivalence criteria allowing to transfer optimized process conditions from one printing parameter set to another. This approach recommends keeping the volumetric laser energy density (VED) and hatching space-to- layer thickness ratio (h/t) constant, while adjusting the scanning speed (v) and hatching space (h) accordingly. To validate this approach, Ti6246 parts were printed with 50 μm and 25 μm layer thicknesses, while keeping VED = 100 J/mm3 and h/t = 3 constant for both cases. The printed samples were analyzed in terms of their density, microstructure and mechanical properties, as well as the geometric compliance of wall-, gap- and channel- containing artefacts. Highly dense samples exhibiting comparable microstructures and mechanical properties were obtained with both parameters sets investigated. However, they induced markedly differing geometric characteristics. Notably, using 25 μm layers allowed printing walls as thin as 0.2 mm as compared to 1.0 mm for 50 μm layers.
| Type de document: | Article publié dans une revue, révisé par les pairs |
|---|---|
| Chercheur(-euse): | Chercheur(-euse) Brailovski, Vladimir |
| Affiliation: | Génie mécanique |
| Date de dépôt: | 13 févr. 2026 16:10 |
| Dernière modification: | 25 mars 2026 20:02 |
| URI: | https://espace2.etsmtl.ca/id/eprint/33351 |
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