Zr-4合金板α相高温区轧制的织构演化

用(0002)正极图和织构取向因子等方法,研究了a相高温区沿原板材的轧向和横向轧制63%的Zr-4合金板的织构。实验结果表明:Zr-4合金板材在a相高温区轧制后的织构与原料板材的织构有关,这是由它的形变机制决定的。Zr-4合金板在a相高温区轧制时,{10`11}<`2113>和{11`21}<`2113> 锥面滑移是主要的形变系统,所以轧制后形成基极取向集中于轧面法向的织构。沿原始板材的轧向进行轧制时,部分晶粒中的{`1010}<`12`10>柱面滑移开动,使轧制后的ft大于fl;沿原始板材的横向进行轧制时,{11`21}<`1`126>孪生的作用使基极沿轧面法向上的取向增强。

Texture Evolution of Zircaloy-4 Plate Rolled at High α Temperature

The texture of Zircaloy-4 plate rolled at high a temperature has been investigated by em-ploying the techniques of (0002) pole figure and texture orientation factor. The results indicated that, the effect of initial textures on the final texture is evident. When Zircaloy-4 plate is rolled at high a tempera-ture, {10`11}<`2113> and {11`21}<`2113> slips are the basic deformation systems, thus the operations of them make basal pole orientate along the normal direction of plate. When Zircaloy-4 is rolled along rolling direction of original plate, ft is larger than fl, which can be explained by the activation of {`1010}<`12`10> slip system in some crystals. When Zircaloy-4 is rolled along transverse direction of original plate, the activation of {11`21}<`1`126> twin system enhances the orientation of basal pole along the normal direction of plate.