Cross wedge rolling (CWR) is one of the most effective plastic deformation methods utilized for the production of shaft parts or non-shaft preforms with refined grains and improved mechanical properties. The main goal of this work was to study the influence of CWR process parameters on the microstructure evolution and mechanical properties of a TC6 alloy and determine the suitable process parameters for a TC6 alloy blade preform fabricated with CWR. The results showed that the volume fraction of the equiaxed α phase (\( f_{\alpha \_e} \)) decreased from ~ 0.38 to ~ 0.04 by increasing the initial deformation temperature, and the elongation (El) also decreased from ~ 19.6 to ~ 11.8% because dislocation slip first started in the equiaxed grains and then dispersed into the adjacent grains. Thus, additional equiaxed grains contributed to an increased plasticity. Moreover, with an increasing area reduction, the value of \( f_{\alpha \_e} \) increased from ~ 0.14 to ~ 0.31, and the grain refinement and microstructure uniformity also increased. In addition, the El was significantly reduced by over 50%, but the ultimate tensile strength (UTS) and yield strength (YS) increased under WC (water cooling) conditions due to the precipitation of the acicular secondary α phase and pinning effect of the small equiaxed α phase. Based on the determined suitable parameters, the TC6 alloy blade preform was successfully manufactured by CWR, the microstructure was evenly distributed, and the UTS, YS and El were 1120.1 MPa, 1020.9 MPa and 15.2%, respectively, which meet the current technical requirements.

中文翻译：

---

楔楔横轧TC6合金叶片预型件的组织演变和力学性能研究

楔横轧（CWR）是最有效的塑性变形方法之一，用于生产具有细晶粒和改善的机械性能的轴零件或非轴预成型坯。这项工作的主要目的是研究CWR工艺参数对TC6合金的组织演变和力学性能的影响，并确定采用CWR制造的TC6合金叶片预成型件的合适工艺参数。结果表明，等轴α相的体积分数（\（f _ {\ alpha \ _e} \））通过增加初始变形温度从〜0.38降低到〜0.04，并且延伸率（El）也从〜19.6降低到〜11.8％，因为位错滑移首先在等轴晶中开始，然后分散到相邻的晶中。因此，额外的等轴晶粒有助于增加可塑性。此外，随着面积减小的增加，\（f _ {\ alpha \ _e} \）的值从〜0.14增加到〜0.31，并且晶粒细化和组织均匀性也增加了。此外，El明显降低了50％以上，但是由于针状次生α相的析出和Pb的钉扎效应，在WC（水冷）条件下，极限抗拉强度（UTS）和屈服强度（YS）有所提高。小等轴α相。基于确定的合适参数，CWR成功制造了TC6合金叶片预型件，组织均匀分布，UTS，YS和El分别为1120.1 MPa，1020.9 MPa和15.2％，满足当前技术要求。