Abstract
Laser powder bed fusion (LPBF) offers great potential for the fabrication of complex shaped products as an additive manufacturing (AM) process, especially for parts with internal flow cooling channels. However, defects such as slagging occur frequently during LPBF and there are still great challenges in the fabrication of overhanging channels. In this paper, the effects of laser power, scanning speed, scanning angle and contour scanning times on the shape and dimensional accuracy of channel structure with 30° and 60° overhanging angle were investigated by the method of orthogonal test, combined with Taguchi and Analysis of variance (ANOVA). The results showed that the laser power has the most significant effect on the roundness and dimensional accuracy of the overhanging channels. Moreover, the formation quality was best when the power decreased to 120 W. The effect of scanning angle becomes significant with the increase of the overhanging angle. In addition, 90° scanning angle for 30° samples resulted in the lowest roundness and dimensional deviation, while 45° scanning angle was required for 60° samples. The optimal combination of process parameters for channels with different overhanging angles was obtained and its optimization effect and stability of process parameters were verified through validation experiments. This research method could be extended to other structural LPBF formation experiments to greatly improve the process optimization efficiency of new structures.
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References
Yang, T., Liu, T.T., Liao, W.H., et al.: Effect of processing parameters on overhanging surface roughness during laser powder bed fusion of AlSi10Mg. J. Manuf. Process. 61, 440–453 (2021)
Li, Z.H., Nie, Y.F., Liu, B., et al.: Mechanical properties of AlSi10Mg lattice structures fabricated by selective laser melting. Mater. Des. 192, 108709 (2020)
Narra, S.P., Cunningham, R., Beuth, J., et al.: Location specific solidification microstructure control in electron beam melting of Ti-6Al-4V. Addit. Manuf. 19, 160–166 (2018)
Khorasani, A.M., Gibson, I., Awan, U.S., et al.: The effect of SLM process parameters on density, hardness, tensile strength and surface quality of Ti-6Al-4V[J]. Addit. Manuf. 25, 176–186 (2019)
Yang, T., Liu, T.T., Liao, W.H., et al.: Laser powder bed fusion of AlSi10Mg: Influence of energy intensities on spatter and porosity evolution, microstructure and mechanical properties. J. Alloy. Compd. 849, 156300 (2020)
Xu, Z., Hyde, C.J., Thompson, A., et al.: Staged thermomechanical testing of nickel superalloys produced by selective laser melting. Mater. Des. 133, 520–527 (2017)
Hassanin, H., Finet, L., Cox, S.C., et al.: Tailoring selective laser melting process for titanium drug-delivering implants with releasing micro-channels. Addit. Manuf. 20, 144–155 (2018)
Navrotsky, V., Graichen, A., Brodin, H.: Industrialisation of 3D printing (additive manufacturing) for gas turbine components repair and manufacturing. VGB PowerTech 12, 48–52 (2015)
Duan, S.Q., Liu, T.T., Liao, W.H., et al.: Research on forming quality of overhanging round hole by selective laser melting. Chin. J. Lasers 45(04), 190–198 (2018)
Khan, H.M., Dirikolu, M.H., Koç, E.: Parameters optimization for horizontally built circular profiles: numerical and experimental investigation. Optik 174, 521–529 (2018)
Kolb, T., Mahr, A., Huber, F., et al.: Qualification of channels produced by laser powder bed fusion: analysis of cleaning methods, flow rate and melt pool monitoring data. Addit. Manuf. 25, 430–436 (2019)
Chen, Z., Wu, X., Tomus, D., et al.: Surface roughness of selective laser melted Ti-6Al-4V alloy components. Addit. Manuf. 21, 91–103 (2018)
Cleveland, W.S., ed. Visualizing Data. 1993, Hobart Press
Rombouts, M., Froyen, L., Gusarov, A.V., et al.: Photopyroelectric measurement of thermal conductivity of metallic powders. J. Appl. Phys. 97(2), 24905 (2005)
Gao, F., Sonin, A.A.: Precise deposition of molten microdrops: the physics of digital microfabrication. Proc. Math. Phys. Sci. 444(1922), 533–554 (1994)
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Chen, X., Yang, T., Liu, T., Liao, W., Wei, H. (2022). Effect of Processing Parameters on the Roundness and Dimensional Accuracy of Overhanging Channel Structure During Laser Powder Bed Fusion of Ti6Al4V. In: Duan, B., Umeda, K., Kim, Cw. (eds) Proceedings of the Eighth Asia International Symposium on Mechatronics. Lecture Notes in Electrical Engineering, vol 885. Springer, Singapore. https://doi.org/10.1007/978-981-19-1309-9_80
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DOI: https://doi.org/10.1007/978-981-19-1309-9_80
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