4.7 Article

The effect of crystallographic texture as a distinct effective parameter on the biocorrosion performance of Ti6Al4V alloy in PBS solution

期刊

CORROSION SCIENCE
卷 179, 期 -, 页码 -

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PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.corsci.2020.109100

关键词

Alloy; Titanium; XRD; EIS; SEM; Passive films

资金

  1. Babol Noshirvani University of Technology [BNUT/388012/99, BNUT/393044/99]

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In this study, different textures of Ti6Al4V alloy with the same microstructure were developed through heat treatment in the alpha + beta phase region. The corrosion rate of the basal texture was found to be 6 times lower than that of the near prismatic texture, with the formation of a thick crack-free passive layer on the corroded surface. These findings provide important insights into the corrosion performance of the alloy.
In this study, different textures of Ti6Al4V alloy at the same microstructure have been developed through heat treatment in the alpha + beta phase region. Scanning electron microscopy and macrotexture analysis were performed on three orthogonal surfaces. The corrosion performance of different surfaces was assessed by open circuit potential, electrochemical impedance spectroscopy, and potentiodynamic polarization in PBS solution. The obtained results showed that the basal texture corrosion rate (3.6 x 10(-5) mm/year) was 6 times lower than those of near prismatic texture. SEM investigation of the corroded surfaces showed the formation of a thick crack-free passive layer on the surface having basal texture.

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