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Effect of hot rolling on structure and mechanical properties of Ti-6Al-4V alloy parts produced by direct laser deposition

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Abstract

Direct laser deposition is an additive manufacturing method capable of producing large-scale titanium alloy parts. In this work, hot rolling process was applied to reduce the porosity and improve the tensile properties of Ti6Al4V parts produced by direct laser deposition additive manufacturing. The hot rolling performed at 950 °C in ambient atmosphere with 10% deformation per pass was found to significantly enhance the mechanical properties. The measured ultimate tensile strengths of the as-built and hot-rolled samples were ~ 850 and ~ 915 MPa, respectively. The elongation at break also increased, from 8.5 to ~ 15%. The total porosity volume was also decreased from 0.09 to 0.003%. Further increase of the accumulated strain up to 47% did not affect significantly the tensile properties.

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Funding

The study was carried out with the financial support from the Ministry of Science and Higher Education of the Russian Federation within the Increase Competitiveness Program of NUST MISIS (K2-2019-009).

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Authors and Affiliations

  1. National University of Science & Technology (“MISIS”), Moscow, Russia, 119049

    P. Sokolov, A. Aleshchenko, A. Koshmin, V. Cheverikin, P. Petrovskiy & A. Travyanov

  2. LTDS Laboratory, UMR 5513, Univ. Lyon, National Engineering School of Saint-Etienne (ENISE), 42100, Saint-Etienne, France

    A. Sova

Authors
  1. P. Sokolov
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  2. A. Aleshchenko
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  3. A. Koshmin
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  4. V. Cheverikin
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  5. P. Petrovskiy
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  6. A. Travyanov
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  7. A. Sova
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Correspondence to A. Sova.

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Sokolov, P., Aleshchenko, A., Koshmin, A. et al. Effect of hot rolling on structure and mechanical properties of Ti-6Al-4V alloy parts produced by direct laser deposition. Int J Adv Manuf Technol 107, 1595–1603 (2020). https://doi.org/10.1007/s00170-020-05132-0

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  • DOI: https://doi.org/10.1007/s00170-020-05132-0

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