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利用“团簇+连接原子”结构模型研究了典型低弹bccβ-Ti固溶体合金的成分特征.对现有低弹β-Ti固溶体合金的成分分析表明它们均满足团簇式[CN14团簇](连接原子)_x.根据该式,设计了Ti-Mo-Nb-Zr系列合金[MoTi_(14)]Ti(质量分数表达时为Ti-11.8Mo),[MoTi_(14)]Nb(Ti-11.2Mo-10.8Nb),[MoTi_(14)]Nb_2(Ti-10.1Mo-19.5Nb)和[Mo(Ti_(13)Zr)]Nb_2(Ti-9.2Zr-9.6Mo-18.7Nb),并采用Cu模吸铸快冷技术制备直径为3和6 mm的合金棒.结果表明,吸铸制备的合金均为bcc结构;当连接原子由Ti变成更低弹的Nb时,合金弹性模量降低;低弹Zr替代Ti进一步降低了合金的弹性模量,[Mo(Ti_(13)Zr)]Nb_2合金的弹性模量E=72 GPa.铸态样品经过固溶和水淬处理后弹性模量降低.
The compositional characteristics of a typical low bismuth-bccβ-Ti solid solution alloy were investigated by using the “cluster + connected atom” structural model. The compositional analysis of the existing low-bismuth β-Ti solid solution alloy indicated that they all satisfy the cluster [CN14 ] (Connection atom) _x.According to this formula, the Ti-Mo-Nb-Zr series alloy [MoTi_ (14)] Ti was designed and characterized as Ti-11.8Mo and MoTi_ (14) Nb -11.2Mo-10.8Nb), [MoTi_ (14)] Nb_2 (Ti-10.1Mo-19.5Nb) and [Mo (Ti_ (13) Zr)] Nb_2 (Ti-9.2Zr-9.6Mo-18.7Nb) The alloy rods with diameters of 3 and 6 mm were prepared by Cu die-casting rapid cooling technique.The results show that all the alloys prepared by suction casting have bcc structure, and when the atoms of atoms are changed from Ti to lower-bounded Nb, the elastic modulus , The elastic modulus of [Mo (Ti_ (13) Zr)] Nb_2 alloy is reduced to E = 72 GPa. The elastic modulus of the as-cast sample after solution treatment and water quenching Decreased.