Abstract:A new kind of β biomedical titanium alloy, Ti-35Nb-4Sn-6Mo-9Zr, composed of non-toxic elements Nb, Mo, Zr and Sn with lower elastic modulus and higher strength was designed based on d-electron alloy design theory and JMatPro software using orthogonal experiment. The microstructure and basic mechanical properties of designed alloy were investigated. The results show that the alloy is composed of single β equiaxed grains after solution treatment at 800 °C. Compared with Ti-6Al-4V, the mechanical properties of the designed alloy are more excellent: E=65 GPa, σ_b=834 MPa, σ_0.2=802 MPa, and δ=11%, which is expected to become a promising new type implanted material. The research approach adopted can reduce the experimental time and cost effectively, and get the ideal experimental results.

Key words: titanium alloy; d-electron alloy design theory; JMatPro software; elastic modulus; strength