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Titanium Alloys Manufactured by In Situ Alloying During Laser Powder Bed Fusion

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Abstract

This work is focused on the investigation and understanding of in situ processes in Ti-15%Mo and Ti6Al4V-1.38%Cu alloys by laser powder bed fusion (LPBF). In both materials, Mo and Cu were introduced as elemental powders into the precursor powder mixture. The effect of process parameters, i.e., energy input on surface morphology and homogeneity, was investigated. The importance of different thermophysical properties of blended powders is also discussed. The chemical composition of phases and phase distribution in sintered materials were investigated by means of scanning electron microscopy. The mechanical properties of in situ alloyed as-built LPBF specimens were determined. The results obtained developed knowledge that is important for understanding the in situ alloying process during LPBF, and they create a base for synthesizing new materials.

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Acknowledgements

This work is based on research supported by the South African Research Chairs Initiative of the Department of Science and Technology and the National Research Foundation of South Africa (Grant 97994) and the Collaborative Program in Additive Manufacturing (Contract CSIR-NLC-CPAM-15-MOA-CUT-01).

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Authors and Affiliations

  1. Department of Mechanical and Mechatronic Engineering, Central University of Technology, Bloemfontein, Free State, 9300, South Africa

    I. Yadroitsev & I. Yadroitsava

  2. Department of Engineering and Physics, Karlstad University, 651 88, Karlstad, Sweden

    P. Krakhmalev

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  1. I. Yadroitsev
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  2. P. Krakhmalev
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  3. I. Yadroitsava
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Correspondence to I. Yadroitsev.

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Yadroitsev, I., Krakhmalev, P. & Yadroitsava, I. Titanium Alloys Manufactured by In Situ Alloying During Laser Powder Bed Fusion. JOM 69, 2725–2730 (2017). https://doi.org/10.1007/s11837-017-2600-7

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  • DOI: https://doi.org/10.1007/s11837-017-2600-7

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