Building direction dependence of corrosion resistance property of Ti–6Al–4V alloy fabricated by electron beam melting

• Published in: Corrosion Science Vol. 127; pp. 101 - 109
• Main Authors: Gong, Xiaojuan, Cui, Yujie, Wei, Daixiu, Liu, Bin, Liu, Ruiping, Nie, Yan, Li, Yunping
• Format: Journal Article
• Language: English; Japanese
• Published: Amsterdam Elsevier Ltd 01.10.2017; Elsevier BV
• Subjects: Alloys; Beta phase; Buildings; Constitution; Corrosion; Corrosion resistance; Corrosion resistant alloys; Electrochemical impedance spectroscopy (EIS); Electron beam melting; Electron beam melting (EBM); Grain boundaries; Melting; Microstructure; Polarization; Titanium alloy; Titanium base alloys; Titanium alloy; Polarization; Electrochemical impedance spectroscopy (EIS); Microstructure; Electron beam melting (EBM)
• ISSN: 0010-938X; 1879-0496
• DOI: 10.1016/j.corsci.2017.08.008

•Electrochemical measurements of EBM Ti–6Al–4V alloy were carried out.•Corrosion resistance in 1 M HCl solution is different along building direction.•Grain boundary and β phase along building direction account for the difference. Electrochemical measurements in 1 M HCl solution were performed to investigate the corrosion behaviour of Ti–6Al–4V alloy fabricated by electron beam melting (EBM) with cylindrical axes deviating from the building direction by 0°, 45°, 55°, and 90°. Microstructure characterization before and after the tests was carried out by using a variety of methods The results suggested that the corrosion resistance of EBM alloy in 1 M HCl solution increased slightly in the order of 45°, 90°, 55°, and 0°. Such difference can be ascribed to the grain boundary density and β phase constitution, which varied with the building direction.