利用磁控钨极电弧炉制备了Ti-35Nb-2Ta-3Zrβ钛合金，采用冷轧对合金进行冷变形，研究轧制变形量对β钛合金的马氏体转变和弹性性能的影响。对不同轧制变形量下的合金通过偏光显微镜、X射线衍射分析、透射电子显微分析和纳米压痕等实验方法，研究了冷轧变形量对 TiNb 合金的显微组织和弹性性能的影响。结果表明，轧制变形过程中β钛合金发生了β→α″的相转变，且随着变形量的增大，马氏体由针状变为粗大的片体，当变形量达到90％时，马氏体变得细小且呈现明显的取向性；纳米压痕实验结果显示，随着变形量的增加，合金的弹性恢复率呈逐渐降低的趋势，弹性模量基本保持不变。
Ti-35Nb-2Ta-3Zr beta titanium alloy was prepared by using magnetic control tungsten electrode arc furnace and rolling were carried out.The influence of cold rolling deformation on martensitic transformation and elastic properties of beta titanium alloy was studied.The influence of cold rolling deformation of TiNb alloy on the microstructure and elastic properties was studied by polarizing microscope,X-ray diffraction analysis,trans-mission electron microscopy analysis and Nano indentation test method.The results show that in the process of rolling deformation,β→α″phase transition happened in the beta titanium alloy.With the increase of the deform-ation,the martensite changed from needle-like to thick strip.When the deformation reaches 90%,the martens-ite became small and had obvious orientation.Nano indentation test results showed that with the increase of the deformation,alloy elastic rebound rate showed a trend of decrease gradually and modulus of elasticity basic re-main unchanged.
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