Medvedev V, Kopp SP, Roth S, Kopp SP (2023)
Publication Language: English
Publication Type: Conference contribution, Conference Contribution
Publication year: 2023
Open Access Link: https://www.wlt.de/sites/default/files/2023-09/Contribution_340.pdf
Additively manufactured parts consisting of polymer powders blended with carbon black have increased protection against ultraviolet radiation and thus are beneficial for applications involving intensive exposure to sunlight. However, this powder blends are challenging to be processed in laser-based powder bed fusion of polymers (PBF-LB/P) due to their high absorptivity of infrared radiation. Thus, precisely tailoring the energy input provided by a CO2-laser is crucial for enhancing process stability for processing highly absorptive polymers. Adapting the laser energy input by applying advanced irradiation strategies offers the possibility to tailor the temperature profiles during PBF-LB/P process. In this study, the effect of advanced laser irradiation strategies with pixel-encoded energy densities on the adaption of the temperature profile of polymer powders blended with carbon black is investigated. Finally, irradiation patterns are defined to achieve spatially tailored temperature profiles across the powder layer for demonstration the capabilities of the developed scanning strategy.
Medvedev, V., Kopp, S.-P., Roth, S., & Kopp, S.-P. (2023). Advanced laser irradiation strategies for tailoring temperature profiles for laser-based powder bed fusion (PBF-LB/P) of highly absorbing polymers. In Proceedings of the Lasers in Manufacturing Conference 2023. München, DE.
Medvedev, Vadim, et al. "Advanced laser irradiation strategies for tailoring temperature profiles for laser-based powder bed fusion (PBF-LB/P) of highly absorbing polymers." Proceedings of the Lasers in Manufacturing Conference 2023, München 2023.