Improved corrosion behaviour of electron beam melted Ti-6Al–4V alloy in phosphate buffered saline
2017; Elsevier BV; Volume: 123; Linguagem: Inglês
10.1016/j.corsci.2017.05.003
ISSN1879-0496
AutoresYun Bai, Xin Gai, Shujun Li, Lai‐Chang Zhang, Yujing Liu, Yulin Hao, Xing Zhang, Rui Yang, Yongbo Gao,
Tópico(s)Metal and Thin Film Mechanics
ResumoThe electrochemical corrosion behaviour of Ti-6Al–4V prepared by electron beam melting was investigated in phosphate buffered saline and compared with those of traditional wrought counterpart. Electrochemical results showed EBM-produced Ti-6Al–4V possesses slightly better corrosion resistance than the wrought Ti-6Al–4V, which is attributed to larger proportions of β phase and ultrafine-grained lamellar α/β phases in the microstructure of EBM-produced Ti-6Al–4V. The β phase enhances the resistance of charge transfer, thereby reducing the rate of metal dissolving reaction; while the α/β phases result in homogenous distribution of alloying elements in different phases thus restraining the galvanic effect between α and β phases.
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