Please use this identifier to cite or link to this item: http://repositorio.unicamp.br/jspui/handle/REPOSIP/327218
Type: Artigo
Title: Microstructure, Mechanical Properties, And Electrochemical Behavior Of Ti-nb-fe Alloys Applied As Biomaterials
Author: Najar Lopes
Eder Socrates; Fernandes Salvador
Camilo Augusto; Andrade
Denis Renato; Cremasco
Alessandra; Campo
Kaio Niitsu; Caram
Rubens
Abstract: New beta metastable Ti alloys based on Ti-30Nb alloy with the addition of 1, 3, or 5 wt pct Fe have been developed using the bond order and the metal d-orbital energy level () design theory. The samples were prepared by arc melting, hot working, and solution heat treatment above the beta transus followed by water quenching (WQ) or furnace cooling (FC). The effect of the cooling rate on the microstructure of Ti-30Nb-3Fe wt pct was investigated in detail using a modified Jominy end quench test. The results show that Fe acts as a strong beta-stabilizing alloying element. The addition of Fe also leads to a reduction in the omega and alpha phases volumetric fractions, although the omega phase was still detected in the WQ Ti-30Nb-5Fe samples, as shown by TEM, and alpha phase clusters were detected by SEM in the FC Ti-30Nb-3Fe samples. Among the WQ samples, the addition of 5 wt pct Fe improves the ultimate tensile strength (from 601 to 689 MPa), reduces the final elongation (from 28 to 16 pct), and impairs the electrochemical corrosion resistance, as evaluated by potentiodynamic polarization tests in Ringer's solution. The microstructural variation arising from the addition of Fe did not change the elastic modulus (approximately 80 GPa for all experimental WQ samples). This study shows that small Fe additions can tailor the microstructure of Ti-Nb alloys, modifying alpha and omega phase precipitation and improving mechanical strength.
Subject: Titanium-alloys
Martensitic-transformation
Corrosion-resistance
Cooling Rate
Phase
Fracture
Ta
Coalescence
Parameters
Niobium
Editor: Springer
New York
Rights: fechado
Identifier DOI: 10.1007/s11661-016-3411-0
Address: https://link.springer.com/article/10.1007/s11661-016-3411-0
Date Issue: 2016
Appears in Collections:Unicamp - Artigos e Outros Documentos

Files in This Item:
File SizeFormat 
000375330700061.pdf2.46 MBAdobe PDFView/Open


Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.