Abstract
Recently, miniaturized products are being used as working tools by many fields, highlighting the medical and dental industries. With the development of Additive Manufacturing (AM) processes, these features can be produced with less material waste and with wide design possibilities by applying a ‘near-net-shape’ technique. Although, the AM parts require post-processing techniques to reach the required material properties, dimensions, and surface roughness and to reduce undesirable residual stresses. In this aspect, the micromilling process is usually applied to attain the desired dimensions and surface roughness and heat treatments to attain the desired material properties and to reduce residual stress. Nonetheless, the micromilling process can be done before or after the heat treatment. In this perspective, this research analyses the surface roughness results for the micromilled AM parts before and after the heat treatment, which is in important for planning the manufacturing route for these parts. Thus, this work aims to compare the surface roughness results of Sa, Sq, Ssk, Sku when performing the micromilling process on AM parts by Laser Powder Bed Fusion (LPBF), with and without heat treatment. For the experiments, the tool size, feed and cutting speed were varied in a full factorial design of experiments. After that, the surface roughness parameters were analyzed and compared for both workpieces. With the achieved results, it can be concluded that the surface texture (Ssk) for the heat-treated and non-heat-treated samples present a predominance of peaks. Also, there is a presence of inordinately high peaks and/or deep valleys on the surface (Sku), which can present an interference of the chips left on the surface not removed by the ultrasonic cleaning. By the analyses of the arithmetic mean deviation (Sa) and the root mean square height (Sq), a better surface quality was achieved when micromilling the samples before the heat treatment for greater tool size, for the specific set of parameters used. With the smaller tool size, a greater surface roughness was achieved if compared to the bigger tool size, though the difference between the samples were not expressive. Moreover, the results achieved in this work can be applied to improve the surface quality of the AM parts used in industry.
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References
Baldo, D.: Study of micro milling of Ti-6Al-4V titanium alloy using signal analysis of force and acoustic emission. M.Sc. thesis, Federal University of São João del-Rei, São João del-Rei (2013)
Uhlmann, E., Kersting, R., Klein, T.B., Cruz, M.F., Borille, A.V.: Additive manufacturing of titanium alloy for aircraft components. In: Procedia CIRP, vol. 35, pp. 55–60 (2015). https://doi.org/10.1016/j.procir.2015.08.061
Chen, L.Y., et al.: Anisotropic response of Ti-6Al-4V alloy fabricated by 3D printing selective laser melting. Mater. Sci. Eng. A 682, 389–395 (2017). https://doi.org/10.1016/j.msea.2016.11.061
Campos, F., Araujo, A.C., Munhoz, A.L.J., Kapoor, S.G.: The influence of additive manufacturing on the micromilling machinability of Ti6Al4V: a comparison of SLM and commercial workpieces. J. Manuf. Process. 60, 299–307 (2020). https://doi.org/10.1016/j.jmapro.2020.10.006
Cardoso, P., Davim, J.P.: Optimization of surface roughness in micromilling. Mater. Manuf. Processes 25(10), 1115–1119 (2010). https://doi.org/10.1080/10426914.2010.481002
Aksin, A., Karpat, Y.: Investigating microstructure effects of heat-treated commercially pure titanium (cp-Ti) based on mechanistic modeling of micro milling. In: 17th CIRP Conference on Modelling of Machining Operations, vol. 82, pp. 166–171 (2019)
Ahmadi, M., Karpat, Y., Acar, O., Kalay, Y.E.: Microstructure effects on process outputs in micro scale milling of heat treated Ti6Al4V titanium alloys. J. Mater. Process. Technol. 252, 333–347 (2018). https://doi.org/10.1016/j.jmatprotec.2017.09.042
Attanasio, A., Gelfi, M., Pola, A., Ceretti, E., Giardini, C.: Influence of material microstructures in micromilling of Ti6Al4V alloy. Materials 6(9), 4268–4283 (2013). https://doi.org/10.3390/ma6094268
Berglund, J., Soderberg, R., Warmefjord, K., Leach, R., Morse, E.: Functional tolerancing of surface texture – a review of existing methods. In: 16th CIRP Conference on Computer Aided Tolerancing (2020)
Etesami, S.A., Fotovvati, B., Asadi, E.: Heat treatment of Ti6Al4V alloy manufactured by laser-based powder bed fusion: process, microstructures, and mechanical properties correlations. J. Alloys Compounds 895, Part 2 (2022). https://doi.org/10.1016/j.jallcom.2021.162618
Olympus: Surface roughness measurement - Parameters (2021). https://www.olympus-ims.com/en/metrology/surface-roughness-measurement-portal/parameters/
Seika, A.G., Kowalski, G.: Influence of roughness on the adhesion of coating on M2 high-speed steels with duplex treatment. Undergraduate diploma thesis, Federal Technological University of Paraná, Curitiba (2014)
Silva, J.: Correlation between surface texture and corrosion of PAPVD processed conjugates: monolayer and duplex Cr-N. M.Sc. thesis, Federal University of Minas Gerais, Belo Horizonte (2004)
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The authors thank the National Council for Scientific and Technological Development (CNPq) for the financial support, the LFS-POLI/USP and LEPU-UFU laboratories for all the support and equipment.
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Gonçalves, M.C.C., Mergulhão, M.V., Batalha, G.F., Stoeterau, R.L. (2024). Heat Treatment Influence on Micromilling of Additively Manufactured Titanium. In: de Oliveira, D., Ziberov, M., Rocha Machado, A. (eds) ABCM Series on Mechanical Sciences and Engineering. COBEF 2023. Lecture Notes in Mechanical Engineering(). Springer, Cham. https://doi.org/10.1007/978-3-031-43555-3_16
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