Effect of Process Parameters on the Surface Microgeometry of a Ti6Al4V Alloy Manufactured by Laser Powder Bed Fusion: 3D vs. 2D Characterization

The influence of the main process parameters, laser power, point distance and time exposure, on the surface microgeometry of Ti6Al4V specimens produced by a pulsed powder bed fusion process was investigated. A 3D characterization was carried out and collected data were elaborated to reconstruct the...

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Bibliographic Details
Published in:Metals (Basel ) 2022-01, Vol.12 (1), p.106
Main Authors: Molinari, Alberto, Ancellotti, Simone, Fontanari, Vigilio, Iacob, Erica, Luchin, Valerio, Zappini, Gianluca, Benedetti, Matteo
Format: Article
Language:English
Subjects:
Additive manufacturing
Alloys
Flux density
Jewelry industry
Kurtosis
laser powder bed fusion
Lasers
material ratio
Metal fatigue
Morphology
Powder beds
Process parameters
Rapid prototyping
roughness
Skewness
Stainless steel
surface microgeometry
Surface roughness
Titanium base alloys
Tomography
Topography
Two dimensional analysis
Two dimensional materials
Valleys
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Summary:The influence of the main process parameters, laser power, point distance and time exposure, on the surface microgeometry of Ti6Al4V specimens produced by a pulsed powder bed fusion process was investigated. A 3D characterization was carried out and collected data were elaborated to reconstruct the surface and to determine both the 3D and the 2D material ratio curves along different directions. The 3D material ratio curve gives a slightly lower material ratio of peak zone Mr1 and higher material ratio of valley zone Mr2, reduced peak height Rpk and reduced valley height Rvk than the 2D curves. Roughness is greater in the 3D analysis than in the 2D one, skewness is the same and kurtosis increases from 3 in 3D. Roughness and skewness increase on increasing point distance and decreasing time exposure and laser power. Within the investigated ranges (27.3–71.2 J/mm3), an increase in energy density reduces the surface roughness while skewness and kurtosis are not significantly affected. The results indicate that a 3D approach allows better characterization of the surface microgeometry than a 2D one.
ISSN:2075-4701
2075-4701
DOI:10.3390/met12010106