2002 Volume 66 Issue 7 Pages 715-722
CP titanium and titanium alloys have been used as biomaterials. Recently, β type titanium alloy, which has good biocompatibility, low modulus, excellent balance of strength and ductility, is widely expected to use for biomedical applications. Very recently, Ti-29Nb-13Ta-4.6Zr alloy is newly designed and developed for biomedical applications. The new alloy is composed of non-toxic elements such as Nb, Ta, and Zr. In present study, various phases appeared in the new alloy according to the various aging treatments were characterized by hardness tests and microstructural observations. Tensile and fatigue properties of the new alloy were also investigated with relating microstructure. Precipitated phases distributed homogeneously over the whole specimen are α and ω phases, when the new alloy is aged at 673 K for 259.2 ks after solution treatment at 1063 K for 3.6 ks. The best balance of strength and elongation in the new alloy was obtained by the condition of 673 K for 259.2 ks after solution treatment at 1063 K for 3.6 ks. Fatigue limit of the new alloy aged at 673 K for 259.2 ks is around 700 MPa.
