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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Stiffness and hardness gradients obtained by laser surface melting of an aged beta-Ti alloy

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Author(s):
da Costa, Fernando Henrique [1] ; Pinhao, Rodrigo [1] ; dos Anjos, Sergio [1] ; Caram, Rubens [1] ; Fogagnolo, Joao Batista [1]
Total Authors: 5
Affiliation:
[1] Univ Estadual Campinas, Sch Mech Engn, Rua Mendeleiev 200, BR-13083860 Campinas, SP - Brazil
Total Affiliations: 1
Document type: Journal article
Source: Materials Letters; v. 260, FEB 1 2020.
Web of Science Citations: 0
Abstract

Components with variable stiffness have been attracting interest because of their potential for use in biomedical implants. Here, a beta-titanium alloy aged under different conditions was subjected to laser surface melting (LSM). The high cooling rate typical of LSM avoided alpha-phase precipitation in the fusion zone (FZ) and heat-affected zone (HAZ) as the alpha precipitates were solid-solutioned into the beta phase, producing a surface layer with full beta phase over the aged substrate and reduced stiffness and hardness. The decrease in stiffness occurred independently of the aging condition used while the decrease in hardness was greater for the sample aged at the lower temperature as this had finer precipitates. A route involving aging at this lower temperature and LSM is proposed for use when a graded material combining a less rigid surface with the original core stiffness and strength is required, as in orthopedic implants. (C) 2019 Elsevier B.V. All rights reserved. (AU)

FAPESP's process: 11/19982-2 - Laser surface powder alloying of titanium with niobium and molybdenum
Grantee:João Batista Fogagnolo
Support Opportunities: Regular Research Grants