Peculiarities of the evolution of the microstructure and mechanical properties depending on the correction of the focal length in parts made by laser melting in a powder layer
Serhii ADJAMSKY, Bogdan DOVGYY, Ganna KONONENKO, Panagiotis KARMIRIS-OBRATAŃSKI, Rostyslav PODOLSKYI
Abstract. Defects in finished products are a major factor contributing to the failure of parts produced through laser melting in a powder bed. Consequently, numerous studies have focused on controlling the laser melting process to achieve high-density parts without voids. In industrial applications, an optical system, specifically a three-axis dynamic focusing system, is commonly used to increase the printing area. However, this system requires focal length adjustments, which significantly influence the quality of the finished products, particularly in terms of the repeatability of mechanical properties based on the focal length offset from the center. Research has shown that variations in focal length correction result in deviations in the mechanical properties of the parts. Microstructural analysis revealed that focal length shifts lead to distortion of track boundaries, indicating changes in track crystallization due to the altered curvature of the focal spot.
Keywords
Focal Spot, Optical System, Dynamic Focusing, Inconel 718, Microstructure, Mechanical Properties
Published online 12/10/2024, 8 pages
Copyright © 2024 by the author(s)
Published under license by Materials Research Forum LLC., Millersville PA, USA
Citation: Serhii ADJAMSKY, Bogdan DOVGYY, Ganna KONONENKO, Panagiotis KARMIRIS-OBRATAŃSKI, Rostyslav PODOLSKYI, Peculiarities of the evolution of the microstructure and mechanical properties depending on the correction of the focal length in parts made by laser melting in a powder layer, Materials Research Proceedings, Vol. 46, pp 57-64, 2024
DOI: https://doi.org/10.21741/9781644903377-8
The article was published as article 8 of the book Innovative Manufacturing Engineering and Energy
Content from this work may be used under the terms of the Creative Commons Attribution 3.0 license. Any further distribution of this work must maintain attribution to the author(s) and the title of the work, journal citation and DOI.
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