论文部分内容阅读
利用钛合金β稳定系数Kβ设计制备了4种具有不同组元和成分的医用钛合金,4种钛合金的Kβ值均在1.0～1.5之间,属于理论上的近β型钛合金。通过X射线衍射分析和背散射电子衍射分析,从4种合金中优化出均匀合金化的3元β型医用Ti-25.6Nb-19.4Ta(%,质量分数)合金。利用硬度测试、压缩实验与透射电子显微镜(TEM)等手段对Ti-25.6Nb-19.4Ta合金在铸态、固溶态和400℃不同时间时效处理后的性能和微观结构进行了测试与分析,结果显示:Ti-25.6Nb-19.4Ta合金经过400℃时效处理后,其硬度、强度、弹性模量等随α相、ω相的析出变化明显。对这些变化的分析,揭示了合金的性能与显微结构的密切关系。
Four types of medical titanium alloys with different elements and compositions were prepared and prepared by the β stability coefficient of titanium alloy. Kβ values of the four kinds of titanium alloys ranged from 1.0 to 1.5 and belonged to the near-β type titanium alloys. The homogeneously alloyed Ti-25.6Nb-19.4Ta (%, mass fraction) alloy was optimized from the four alloys by X-ray diffraction analysis and backscattered electron diffraction analysis. The properties and microstructures of Ti-25.6Nb-19.4Ta alloy after aging at different temperatures of as-cast, solution and 400 ℃ were tested and analyzed by means of hardness test, compression test and transmission electron microscopy (TEM) The results show that the hardness, strength and elastic modulus of Ti-25.6Nb-19.4Ta alloy change obviously with the α phase and ω phase after being aged at 400 ℃. Analysis of these changes reveals the close relationship between the properties and the microstructure of the alloy.