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Ti6Al7Nb-based TiB-reinforced composites by selective laser melting

Singh, N and Acharya, S and Prashanth, KG and Chatterjee, K and Suwas, S (2021) Ti6Al7Nb-based TiB-reinforced composites by selective laser melting. In: Journal of Materials Research .

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Official URL: https://doi.org/10.1557/s43578-021-00238-x

Abstract

Abstract: The alloy Ti6Al7Nb with the in situ reinforcement of TiB has been processed by selective laser melting (SLM). Premixed Ti6Al7Nb-xTiB2 powders were used for the powder bed. The microstructure of the Ti6Al7Nb alloy was characterized by martensite (αʹ), while the addition of TiB2 led to a bimodal microstructure with refined features as a result of in situ formation of fine TiB phase. A prismatic < 11 0 > ��BD fiber texture was evident in all samples, though the texture formation was found to be affected by the change in the phase transformation pathway due to the formation of TiB. Higher hardness and yield strength (YS) in the composites as compared to the base material are attained. The examination of corrosion response revealed a lower corrosion current (Icorr) value for all the specimens in simulated body fluid (SBF) in comparison to Ti6Al4V alloy. The improved mechanical behavior and better corrosion resistance indicate the potential of SLM-processed Ti6Al7Nb/TiB composite as a suitable replacement for Ti6Al4V alloys for bio-implants. Graphic Abstract: Figure not available: see fulltext. © 2021, The Author(s), under exclusive licence to The Materials Research Society.

Item Type: Journal Article
Publication: Journal of Materials Research
Publisher: Springer Nature
Additional Information: The copyright for this article belongs to Springer Nature
Keywords: Aluminum alloys; Body fluids; Corrosion resistance; Corrosion resistant alloys; Melting; Niobium alloys; Reinforcement; Selective laser melting; Ternary alloys; Textures, Bi-modal microstructures; Corrosion current; In-situ formations; Mechanical behavior; Reinforced composites; Selective laser melting (SLM); Simulated body fluids; Transformation pathways, Titanium alloys
Department/Centre: Division of Mechanical Sciences > Materials Engineering (formerly Metallurgy)
Date Deposited: 04 Aug 2021 11:38
Last Modified: 04 Aug 2021 11:38
URI: http://eprints.iisc.ac.in/id/eprint/69079

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