Nanostructured bulk HPT β Ti-42Nb alloy as biomaterial for implants obtained directly from micrometric powders

Author(s)

Kuroda, Pedro A. B. ; Carvalho, Amanda P. ; Caram, Rubens ; Figueiredo, Roberto B. ; Afonso, Conrado R. M.

• Document type: Journal article
• Source: Materials Letters; v. 378, p. 4-pg., 2024-10-25.

Abstract

The effect of high-pressure torsion (HPT) processing on mechanical properties in a (3 Ti-42Nb alloy micrometric powder consolidated in a nanostructured bulk disc through severe plastic deformation for biomedical applications is investigated. XRD, SEM and TEM/ASTAR characterization are used to characterize microstructure of the original micrometric powder and the consolidated disc of (3 Ti-42Nb alloy after HPT. The results show that severe plastic deformation processing improves Vickers hardness of (3 Ti-42Nb alloy, and leads to a low modulus bulk material with E = 63 GPa after HPT, comparable with that of as-cast alloy. The obtaining of nanostructured grain size around 55 nm bulk (3 Ti-42Nb alloy consolidated through HPT from micrometric atomized powder opens perspectives of applications as biomedical implants. (AU)

• FAPESP's process: 18/18293-8 - Titanium alloys: phase transformations and additive manufacturing applied to obtaining functionally graded materials
• Grantee: Rubens Caram Junior
• Support Opportunities: Research Projects - Thematic Grants
• FAPESP's process: 19/26517-6 - Influence of the microstructure and phases on surface functionalization of beta Ti-25Ta-xZr- alloys system
• Grantee: Pedro Akira Bazaglia Kuroda
• Support Opportunities: Scholarships in Brazil - Post-Doctoral
• FAPESP's process: 21/03756-5 - Advanced magnesium materials for load-bearing applications in Medicine
• Grantee: Andrea Madeira Kliauga
• Support Opportunities: Regular Research Grants