Abstract
The paper presents tensile tests and Charpy tests of Ti6Al4V samples made with different build orientations in a laser powder bed fusion process. Seven different build orientations from 0° to 90° were tested. The test specimens were heat treated at 850 ℃. Fracture surfaces were investigated with SEM. The materials showed a high degree of isotropy when measuring yield strength, tensile strength and elastic modulus. Elongation measurements indicated some degree of anisotropy, but not statistically significant. A similar trend was found in Charpy impact energy. Pores, microstructure and melt pool boundaries were investigated to explain the obtained results. The impact of pores was found to be insignificant. Melt pool boundaries and columnar prior-β grains are not a significant factor in the anisotropic trends observed. The anisotropy in mechanical properties was found to be caused by microstructure and/or crystallographic texture.
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The authors thank the Interreg Sweden-Norway programme for supporting this work through the TROJAM project.
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Nes, E.V., Hovig, E.W., Feitosa, L., Sørby, K. (2022). Effect of Building Orientation in Mechanical Properties of Ti6Al4V Produced with Laser Powder Bed Fusion. In: Wang, Y., Martinsen, K., Yu, T., Wang, K. (eds) Advanced Manufacturing and Automation XI. IWAMA 2021. Lecture Notes in Electrical Engineering, vol 880. Springer, Singapore. https://doi.org/10.1007/978-981-19-0572-8_30
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DOI: https://doi.org/10.1007/978-981-19-0572-8_30
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