Phase transformation and mechanical properties of TLM titanium alloy for orthopaedic implant application

Phase transformation and mechanical properties of TLM titanium alloy for orthopaedic implant application were studied. The results show that a small amount of slender α″ phase exists in the β matrix after solution treating and water quenching. The formation of α phase goes through two procedures during the aging treatment from 300°C to 500°C, one is β&rarrω&rarrα, and the other is α″&rarrα. While the micrographs reveal that α″ martensite hinder the nucleation and growth of metastable ω phase. The effect of the phase structures on reducing the elastic modulus is in the order of ω>α″>α, and the effect on improving the strength is in the order of ω>α>α″, and vice versa for improving the elongation of TLM alloy. Copyright © 2012, Northwest Institute for Nonferrous Metal Research. Published by Elsevier BV. All rights reserved.