Abstract A series of ternary Ti–6Zr-xFe (x = 4, 5, 6, 7 wt %) biomedical titanium alloy was designed to develop potential biomedical materials. The effect of the Fe content on microstructure, mechanical properties, Young's modulus, and electrochemical behavior was studied in depth. The developed Ti–6Zr-xFe (x = 4, 5, 6, 7 wt %) alloys are mainly composed of α and β phases. The results indicated that the grain size of the β phase in Ti–6Zr-xFe alloys decreased with the increase of Fe element. The increase of Fe content also caused the decrease of α phase fraction, increase of β phase fraction and formation of ω phase. Besides, the increase of Fe content improved the microhardness (264, 300, 328, and 348 HV) and ultimate tensile strengths (748, 829, 917, and 994 MPa) of Ti–6Zr-xFe alloys due to the contribution of solid-solution strengthening effect for higher Fe contents, the refined strength of the β phase and the dispersion strength of ω phase. Young's modulus of Ti–6Zr-xFe alloys was 90, 93, 93, and 94 GPa, which was lower than that of Ti–6Al–4V alloy. Moreover, the Ti–6Zr-xFe alloy with the addition of 4 and 5 wt % Fe displayed excellent corrosion resistance. These results show that Ti–6Zr-xFe alloys are potential biomedical materials.

中文翻译：

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用于生物医学应用的新型三元 Ti-6Zr-xFe 合金的显微组织和性能

摘要 设计了一系列三元 Ti-6Zr-xFe (x = 4, 5, 6, 7 wt %) 生物医用钛合金以开发潜在的生物医用材料。深入研究了Fe含量对微观结构、机械性能、杨氏模量和电化学行为的影响。开发的 Ti-6Zr-xFe (x = 4, 5, 6, 7 wt%) 合金主要由 α 和 β 相组成。结果表明，Ti-6Zr-xFe合金中β相的晶粒尺寸随着Fe元素的增加而减小。Fe含量的增加也引起α相分数的减少，β相分数的增加和ω相的形成。此外，Fe 含量的增加提高了显微硬度（264、300、328 和 348 HV）和极限抗拉强度（748、829、917、和 994 MPa) Ti-6Zr-xFe 合金由于固溶强化效应对更高的 Fe 含量、β 相的细化强度和 ω 相的分散强度的贡献。Ti-6Zr-xFe 合金的杨氏模量分别为 90、93、93 和 94 GPa，低于 Ti-6Al-4V 合金。此外，添加 4% 和 5% 铁的 Ti-6Zr-xFe 合金显示出优异的耐腐蚀性。这些结果表明 Ti-6Zr-xFe 合金是潜在的生物医学材料。