Effects of oxigen addition on the phase stability and metastability of Ti-Nb-O alloys applied as biomaterials

• Grant number: 09/10983-6
• Support Opportunities: Regular Research Grants
• Start date: October 01, 2009
• End date: September 30, 2011
• 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

Abstract

This work deals with evaluation of stability and meta-stability of type beta titanium alloys in the Ti-Nb-O system. In such a system, Nb element behaves as beta-stabilizer element, while oxygen is controlled added in order to avoid omega phase precipitation, which is undesirable. This study will be developed by carrying out the following investigations: (a) effect of Nb and O content on the phase stability under different cooling conditions; (b) effect of O content on suppression of formation of omega phase, (c) effects of aging heat treatment on microstructure and (d) evaluation of mechanical behavior of alloy studied. (AU)