There is an increasing demand for thin-walled long tubular workpieces of titanium alloys with excellent mechanical properties, which can be produced by power spinning owing to its specific advantages over other forming processes. In this paper, a novel spinning forming process, named cross spinning (CS), was proposed to tune the hoop properties of as-spun tubular workpieces. Traditional unidirectional spinning (UDS) and CS experiments were conducted to form the tubular workpieces of Ti–6Al–4V alloy, and their mechanical properties and microstructure evolution were analyzed and compared. The tensile test indicated that both axial and tangential strengths of the CS specimens were higher than that of the UDS specimens, which was more remarkable for the tangential strength. To clarify this phenomenon, crystal plasticity finite element method (CPFEM) coupled with spinning texture information was used to simulate the tensile test for the CS and UDS specimens. The results indicated that a more homogeneous texture was formed during CS, inducing lower average Schmid factor for prismatic slip system and larger activities of the pyramidal slip systems, was the major cause for enhancing the hoop mechanical properties of the as-spun workpieces compared with that during UDS.

对于具有优异机械性能的钛合金薄壁长管状工件的需求不断增长，由于其相对于其他成型工艺的特殊优势，可以通过动力纺丝生产。在本文中，提出了一种新的纺丝成型工艺，称为交叉纺丝（CS），以调整刚纺管状工件的环向性能。进行了传统的单向旋转（UDS）和CS实验以形成Ti-6Al-4V合金的管状工件，并对它们的机械性能和微观组织演变进行了分析和比较。拉伸试验表明，CS试样的轴向和切线强度均高于UDS试样，这在切线强度上更为显着。为了澄清这种现象，晶体塑性有限元方法（CPFEM）结合纺丝纹理信息被用来模拟CS和UDS试样的拉伸试验。结果表明，在CS加工过程中形成了更均匀的织构，导致棱柱滑移系统的平均Schmid因子较低，而金字塔滑移系统的活动较大，这是与之相比提高初纺工件环向机械性能的主要原因在UDS中。