4.6 Article Proceedings Paper

Qualification of Ti6Al4V ELI Alloy Produced by Laser Powder Bed Fusion for Biomedical Applications

Journal

JOM
Volume 70, Issue 3, Pages 372-377

Publisher

SPRINGER
DOI: 10.1007/s11837-017-2655-5

Keywords

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Funding

  1. South African Research Chairs Initiative of the Department of Science and Technology
  2. National Research Foundation of South Africa [97994]
  3. Collaborative Program in Additive Manufacturing [CSIR-NLC-CPAM-15-MOA-CUT-01]

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Rectangular Ti6Al4V extralow interstitials (ELI) samples were manufactured by laser powder bed fusion (LPBF) in vertical and horizontal orientations relative to the build platform and subjected to various heat treatments. Detailed analyses of porosity, microstructure, residual stress, tensile properties, fatigue, and fracture surfaces were performed based on x-ray micro-computed tomography, scanning electron microscopy, and x-ray diffraction methods. The types of fracture and the tensile fracture mechanisms of the LPBF Ti6Al4V ELI alloy were also studied. Detailed analysis of the microstructure and the corresponding mechanical properties were compared against standard specifications for conventional Ti6Al4V alloy for use in surgical implant applications. Conclusions regarding the mechanical properties and heat treatment of LPBF Ti6Al4V ELI for biomedical applications are made.

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