In Vitro Corrosion Behavior of Selective Laser Melted Ti-35Nb-7Zr-5Ta

Ummethala, R and Jayaraj, J and Karamched, PS and Rathinavelu, S and Singh, N and Surreddi, KB and Prashanth, KG (2021) In Vitro Corrosion Behavior of Selective Laser Melted Ti-35Nb-7Zr-5Ta. In: Journal of Materials Engineering and Performance .

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Abstract

Ti-35Nb-7Zr-5Ta (TNZT) alloy has been fabricated by selective laser melting (SLM) at different build orientations with respect to the base plate and the resulting disparities in the grain shape, size, preferred orientations and lattice strains have been determined. Potentiodynamic polarization tests performed under in vitro conditions indicated that the specimens built at 45° orientation showed the highest polarization resistance (24.5 kΩ cm2) and lowest rate of corrosion (0.23 μA cm�2) compared to the specimens built at other orientations. The corrosion behaviors of the SLM specimens have been correlated with their microstructural features and further compared with that of its spark plasma sintered (SPS) counterpart and commercial alloys such as Ti6Al4V and Ti6Al7Nb. Electrochemical impedance spectroscopy and potentiostatic measurements have revealed that the passive film forming on the TNZT sample at 45° orientation is highly stable and more protective than that of the other samples. Auger electron spectroscopy has confirmed that both Ti and Nb participate actively in the passive film formation on the SLM TNZT alloy. © 2021, ASM International.

Item Type:	Journal Article
Publication:	Journal of Materials Engineering and Performance
Publisher:	Springer
Additional Information:	The copyright for this article belongs to Springer
Keywords:	Aluminum alloys; Auger electron spectroscopy; Corrosion rate; Corrosive effects; Electrochemical corrosion; Electrochemical impedance spectroscopy; Niobium alloys; Polarization; Selective laser melting; Tantalum alloys; Tantalum metallography; Ternary alloys; Titanium alloys; Titanium metallography; Zircaloy; Zirconium metallography, Corrosion behavior; In-vitro corrosions; Microstructural features; Polarization resistances; Potentiodynamic polarization tests; Potentiostatic measurements; Preferred orientations; Selective laser melting (SLM), Niobium metallography
Department/Centre:	Division of Mechanical Sciences > Materials Engineering (formerly Metallurgy)
Date Deposited:	27 Aug 2021 11:53
Last Modified:	27 Aug 2021 11:53
URI:	http://eprints.iisc.ac.in/id/eprint/69550

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