为研究开发高强度、低弹性模量、低成本医用β型钛合金,根据d-电子合金设计理论设计了Ti-28Nb-13Zr-0.5Fe(质量分数%)、Ti-28Nb-13Zr-2Fe(质量分数%)和Ti-35Nb-13Zr-2Fe(质量分数%)3种β型钛合金.利用光学显微镜、TEM和XRD观察和分析了β相区固溶处理后合金微观组织形貌和物相组成,利用拉伸试验测试了其室温力学性能.结果表明:3种合金固溶处理后,分别获得β+α+溶质原子不均匀区、β+溶质原子不均匀区和稳定、单β相组织.具有β+α+溶质原子不均匀区混合结构的Ti-28Nb-13Zr-0.5Fe(质量分数%)合金具有高强度和低弹性模量的最佳匹配.Nb在合金中具有细化晶粒的作用.
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