Cu-Zn合金引抜材の繊維組織形成

Abstract

The influence of zinc concentration and drawing ratio of brass rods on the forming process of the drawing texture has been investigated by means of the determination of X-ray pole figures and the orientation distribution functions, and by transmission electron microscopy.The 〈511〉 twin component parallel to the drawing direction increases with the increase in zinc concentration and drawing ratio, and these mechanical twins are fine lamellae and consist of locally developing selected areas in the 〈111〉 orientation region. Consequently it is scarcely expected that the 〈100〉 orientation is developed by the slip rotation from the 〈511〉 twin component, because the twin component area is a microscopically laminated structure composed of alternate layers of 〈511〉 orientation and 〈111〉 preferred orientation, and the normal slip rotation toward the 〈100〉 component is disturbed by the competition of active slip systems.