Journal
MATERIALS SCIENCE AND ENGINEERING C-MATERIALS FOR BIOLOGICAL APPLICATIONS
Volume 70, Issue -, Pages 832-841Publisher
ELSEVIER
DOI: 10.1016/j.msec.2016.07.045
Keywords
Selective laser melting (SLM); Electron beam melting (EBM); Corrosion resistance; Ti-6Al-4V; Implants
Categories
Funding
- Department of Stomatology, General Hospital of Chinese PLA
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The purpose of this study is to determine the corrosion resistance of Ti-6Al-4V alloy fabricated with electron beam melting and selective laser melting for implantation in vivo. Ti-6Al-4V alloy specimens were fabricated with electron beam melting (EBM) and selective laser melting (SLM). A wrought form of Ti-6Al-4V alloy was used as a control. Surface morphology observation, component analysis, corrosion resistance experimental results, electrochemical impedance spectroscopy, crevice corrosion resistance experimental results, immersion test and metal ions precipitation analysis were processed, respectively. The thermal stability of EBM specimen was the worst based on the result of open circuit potential (OCP) result The result of electrochemical impedance spectroscopy indicated that the corrosion resistance of the SLM specimen was the best under the low electric potential. The result of potentiodynamic polarization suggested that the corrosion resistance of the SLM specimen was the best under the low electric potential (<1.5 V) and EBM specimen was the best under the high electric potential (>1.5 V). The crevice corrosion resistance of the EBM specimen was the best The corrosion resistance of SLM specimen was the best, based on the result of immersion test. The content of Ti, Al and V ions of EBM, SLM and wrought specimens was very low. In general, the scaffolds that were fabricated with EBM and SLM had good corrosion resistance, and were suitable for implantation in vivo. (C) 2016 Elsevier B.V. All rights reserved.
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