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Alpha phase nucleation in metastable beta type titanium alloys in the Ti-Nb-Fe system

Grant number: 14/06099-1
Support Opportunities:Regular Research Grants
Duration: August 01, 2014 - July 31, 2016
Field of knowledge:Engineering - Materials and Metallurgical Engineering - Physical Metallurgy
Principal Investigator:Rubens Caram Junior
Grantee:Rubens Caram Junior
Host Institution: Faculdade de Engenharia Mecânica (FEM). Universidade Estadual de Campinas (UNICAMP). Campinas , SP, Brazil


In well different industrial segments such as aerospace and medical, the use titanium and its alloys in the manufacturing of devices has increased consistently in recent years. The use of such metal in a so varied manner, either in jet engines or orthopedic implants, is due to its unique characteristics, specifically high mechanical strength, low density, high corrosion resistance and good biocompatibility. Recent studies associated with the structural use of titanium in the aerospace and medical/dental sectors have focused on the development of beta metastable titanium alloys. This study aims to discuss the preparation, processing and characterization of the beta metastable alloy Ti-5553 (Ti-5Al-5V-5Mo-3Cr-0.5Fe) and two alloys with compositions modified by the addition of niobium to replace vanadium. Such alloys will be prepared by arc melting, deformed plastically by hot forging and submitted to different aging heat treatments. Characterization will be carried out by applying optical microscopy and scanning electron microscopy, measurements of elastic modulus and Vickers hardness. It is expected that the replacement of V by Nb will not modify the main characteristics of the Ti-5553 alloy, in particular, their high mechanical strength and low kinetic of phase transformations. (AU)

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Scientific publications (5)
(References retrieved automatically from Web of Science and SciELO through information on FAPESP grants and their corresponding numbers as mentioned in the publications by the authors)
DA COSTA, FERNANDO HENRIQUE; SALVADOR, CAMILO A. F.; DE MELLO, MARIANA G.; CARAM, RUBENS. Alpha phase precipitation in Ti-30Nb-1Fe alloys - phase transformations in continuous heating and aging heat treatments. MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, v. 677, p. 222-229, . (13/13867-2, 14/06099-1)
DE MELLO, MARIANA G.; SALVADOR, CAMILO F.; CREMASCO, ALESSANDRA; CARAM, RUBENS. The effect of Sn addition on phase stability and phase evolution during aging heat treatment in Ti-Mo alloys employed as biomaterials. MATERIALS CHARACTERIZATION, v. 110, p. 5-13, . (14/06099-1)
SALVADOR, CAMILO A. F.; LOPES, EDER S. N.; BETTINI, JEFFERSON; CARAM, RUBENS. Formation of alpha phase via pseudospinodal decomposition in Ti-Nb-Fe based alloys. Materials Letters, v. 189, p. 201-205, . (14/24449-0, 14/06099-1)
MELLO, M. G.; TAIPINA, M. O.; RABELO, G.; CREMASCO, A.; CARAM, R.. Production and characterization of TiO2 nanotubes on Ti-Nb-Mo-Sn system for biomedical applications. SURFACE & COATINGS TECHNOLOGY, v. 326, n. A, p. 126-133, . (14/00159-2, 14/06099-1)
SALVADOR, CAMILO A. F.; DAL BO, MARIANA R.; COSTA, FERNANDO H.; TAIPINA, MARCIA O.; LOPES, EDER S. N.; CARAM, RUBENS. Solute lean Ti-Nb-Fe alloys: An exploratory study. JOURNAL OF THE MECHANICAL BEHAVIOR OF BIOMEDICAL MATERIALS, v. 65, p. 761-769, . (14/24449-0, 14/06099-1)

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