The Effect of Build Direction on the Thermal Conductivity of Additively Manufactured AlSi10Mg and Silicon-steel Samples

2022 International Conference on Electrical Machines (ICEM 2022) 2022
Martin Sarap, Ants Kallaste, Payam Shams Ghahfarokhi, Hans Tiismus, Toomas Vaimann

Increasing power densities in electrical machines create a demand for more powerful thermal solutions, which additive manufacturing can provide. However, the material properties of additively manufactured objects are unknown. In this paper, the anisotropic thermal conductivities of aluminum alloy (AlSi10Mg) and high-silicon steel (Fe-3.7%w.t.Si) samples manufactured using selective laser melting (SLM) were analyzed before and after heat-treatment. It was found that the thermal conductivities of the as-built aluminum samples were significantly higher in the SLM build direction, while the annealed samples showed higher thermal conductivities and no anisotropy. The silicon-steel samples showed constant thermal conductivity and no anisotropy before and after heat treatment. The results of this study will be beneficial for designing future AM thermal solutions for electrical machines.

Keywords
Electromagnetic heating, Power system measurements, Anisotropic magnetoresistance, Annealing, Conductivity , Thermal conductivity , Three-dimensional printing
DOI
10.1109/ICEM51905.2022.9910944

Sarap, M., Kallaste, A., Shams Ghahfarokhi, P., Tiismus, H., Vaimann, T. The Effect of Build Direction on the Thermal Conductivity of Additively Manufactured AlSi10Mg and Silicon-steel Samples. In: 2022 International Conference on Electrical Machines (ICEM 2022), Spain, Valencia, 5-8 September, 2022. Piscataway: IEEE, 2022, pp.1-6. ISBN 978-1-6654-1433-3. e-ISBN 978-1-6654-1432-6. Available from: doi:10.1109/ICEM51905.2022.9910944

Publication language
English (en)