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In situ production of low-modulus Ti-Nb alloys by selective laser melting and their functional assessment toward orthopedic applications.
Singh, Neera; Srikanth, K P; Gopal, Vasanth; Rajput, Monika; Manivasagam, Geetha; Prashanth, K G; Chatterjee, Kaushik; Suwas, Satyam.
Afiliação
  • Singh N; Department of Materials Engineering, Indian Institute of Science, Bangalore 560012, India. satyamsuwas@iisc.ac.in.
  • Srikanth KP; Department of Mechanical and Industrial Engineering, Tallinn University of Technology, Ehitajate tee 5, 19086 Tallinn, Estonia.
  • Gopal V; Department of Materials Engineering, Indian Institute of Science, Bangalore 560012, India. satyamsuwas@iisc.ac.in.
  • Rajput M; Department of Physics, School of Advanced Sciences, Vellore Institute of Technology, Vellore 632014, India.
  • Manivasagam G; Department of Materials Engineering, Indian Institute of Science, Bangalore 560012, India. satyamsuwas@iisc.ac.in.
  • Prashanth KG; Department of Physics, School of Advanced Sciences, Vellore Institute of Technology, Vellore 632014, India.
  • Chatterjee K; CBCMT, School of Mechanical Engineering, Vellore Institute of Technology, Vellore 632014, India.
  • Suwas S; Department of Mechanical and Industrial Engineering, Tallinn University of Technology, Ehitajate tee 5, 19086 Tallinn, Estonia.
J Mater Chem B ; 12(24): 5982-5993, 2024 Jun 19.
Article em En | MEDLINE | ID: mdl-38809161
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 ß-phase (cubic) in Ti-40.0Nb and a mixture of (α'' orthorhombic + ß 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 ß 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.
Assuntos

Texto completo: 1 Base de dados: MEDLINE Assunto principal: Titânio / Ligas / Lasers / Nióbio Limite: Animals / Humans Idioma: En Ano de publicação: 2024 Tipo de documento: Article

Texto completo: 1 Base de dados: MEDLINE Assunto principal: Titânio / Ligas / Lasers / Nióbio Limite: Animals / Humans Idioma: En Ano de publicação: 2024 Tipo de documento: Article