Tribocorrosion Behavior of NiTi Biomedical Alloy Processed by an Additive Manufacturing Laser Beam Directed Energy Deposition Technique

Mihaela Buciumeanu; Allen Bagheri; Filipe Samuel Silva; Bruno Henriques; Andrés F Lasagni; Nima Shamsaei

doi:10.3390/ma15020691

Tribocorrosion Behavior of NiTi Biomedical Alloy Processed by an Additive Manufacturing Laser Beam Directed Energy Deposition Technique

Materials (Basel). 2022 Jan 17;15(2):691. doi: 10.3390/ma15020691.

Authors

Mihaela Buciumeanu¹, Allen Bagheri², Filipe Samuel Silva³, Bruno Henriques^{3

4}, Andrés F Lasagni^{5

6}, Nima Shamsaei^{7

8}

Affiliations

¹ Department of Mechanical Engineering, Faculty of Engineering, "Dunărea de Jos" University of Galaţi, Domnească 47, 800008 Galati, Romania.
² Center for Advanced Vehicular Systems (CAVS), Mississippi State University, Starkville, MS 39762, USA.
³ Center for Micro-Electro Mechanical Systems (CMEMS-UMinho), Campus de Azurém, University of Minho, 4800-058 Guimarães, Portugal.
⁴ Laboratory of Ceramic and Composite Materials (CERMAT), Campus Trindade, Federal University of Santa Catarina (UFSC), Florianópolis 88040-900, SC, Brazil.
⁵ Institute for Manufacturing Technology, Technische Universität Dresden, 01062 Dresden, Germany.
⁶ Fraunhofer-Institut für Werkstoff- und Strahltechnik IWS, Winterbergstr. 28, 01277 Dresden, Germany.
⁷ Department of Mechanical Engineering, Auburn University, Auburn, AL 36849, USA.
⁸ National Center for Additive Manufacturing Excellence (NCAME), Auburn University, Auburn, AL 36849, USA.

Abstract

The purpose of the present study was to experimentally assess the synergistic effects of wear and corrosion on NiTi alloy in comparison with Ti-6Al-4V alloy, the most extensively used titanium alloy in biomedical applications. Both alloys were processed by an additive manufacturing laser beam directed energy deposition (LB-DED) technique, namely laser engineered net shaping (LENS), and analyzed via tribocorrosion tests by using the ball-on-plate configuration. The tests were carried out in phosphate buffered saline solution at 37 °C under open circuit potential (OCP) to simulate the body environment and temperature. The synergistic effect of wear and corrosion was found to result in an improved wear resistance in both materials. It was also observed that, for the process parameters used, the LB-DED NiTi alloy exhibits a lower tendency to corrosion as compared to the LB-DED Ti-6Al-4V alloy. It is expected that, during the service life as an implant, the NiTi alloy is less susceptible to the metallic ions release when compared with the Ti-6Al-4V alloy.

Keywords: NiTi; Ti-6Al-4V; laser engineered net shaping (LENS); tribocorrosion.

Abstract

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