In situ production of low-modulus Ti-Nb alloys by selective laser melting and their functional assessment toward orthopedic applications

Singh, N and Srikanth, KP and Gopal, V and Rajput, M and Manivasagam, G and Prashanth, KG and Chatterjee, K and Suwas, S (2024) In situ production of low-modulus Ti-Nb alloys by selective laser melting and their functional assessment toward orthopedic applications. In: Journal of Materials Chemistry B, 12 (24). pp. 5982-5993.

PDF jou_mat_che_2024.pdf - Published Version Restricted to Registered users only Download (4MB) | Request a copy

Abstract

This work aimed to manufacture Ti-28.5Nb and Ti-40.0Nb (wt) alloys in situ via selective laser melting (SLM) from Ti and Nb elemental powders. X-ray diffraction analysis revealed complete β-phase (cubic) in Ti-40.0Nb and a mixture of (α�� orthorhombic + β cubic) phases in Ti-28.5Nb were formed, whereas few of the Nb particles remained only partially fused during manufacturing. The fraction of partially melted Nb particles was determined as �2 and �18 in Ti-28.5Nb and Ti-40Nb, respectively. Mechanical characterization revealed higher hardness and more strength in Ti-28.5Nb than in Ti-40.0Nb due to the presence of the α�� phase in the former. Tribocorrosion tests reveal a significantly better wear-corrosion resistance for Ti-40.0Nb, as determined from a lower total volume loss in Ti-40.0Nb (�2 � 10�4 mm�3) than in Ti-28.5Nb (�13 � 10�2 mm�3). The lower volume loss and better corrosion resistance behavior are attributed to the β phase, which was dominant in Ti-40.0Nb. Cell studies reveal no toxicity for up to 7 days. Both the alloys were better at supporting cell proliferation than wrought Ti6Al4V. This study presents a route to preparing Ti-Nb alloys in situ by SLM that are promising candidates for biomedical applications. © 2024 The Royal Society of Chemistry.

Item Type:	Journal Article
Publication:	Journal of Materials Chemistry B
Publisher:	Royal Society of Chemistry
Additional Information:	The copyright for this article belongs to Royal Society of Chemistry.
Keywords:	Aluminum alloys; Binary alloys; Cell proliferation; Corrosion resistance; Corrosion resistant alloys; Medical applications; Melting; Niobium alloys; Selective laser melting; Tribology; Wear resistance; X ray powder diffraction, Cubic phase; Elemental powders; High hardness; In-situ production; Low-modulus; Mechanical characterizations; Orthopaedic applications; Selective laser melting; Tribo-corrosion; Volume loss, Titanium alloys
Department/Centre:	Division of Mechanical Sciences > Materials Engineering (formerly Metallurgy)
Date Deposited:	21 Aug 2024 11:54
Last Modified:	21 Aug 2024 11:54
URI:	http://eprints.iisc.ac.in/id/eprint/85490

Actions (login required)

View Item