Abstract
This study investigated the texture formation process of A6063 alloy hot extruded material using electron backscatter diffraction (EBSD) measurements. The cube component that becomes the main orientation during hot extrusion was formed near the bearing inflow in the extrusion chamber and grew with continuous recrystallization. The Goss component with the same ED // <100> relationship as the cube component was not formed in the chamber or the bearing but was formed by discontinuous recrystallization after passing through the bearing. The TD // <111> orientation component of the surface layer was formed in the bearing and then grew with discontinuous recrystallization. However, because the internal cube and Goss components expanded preferentially, the surface layer TD // <111> components were replaced by the cube and Goss components after passing through the bearing. The cubic texture formation of extruded aluminium alloys is noted to be analogous to the formation of rolling sheet materials, formed by recovery and recrystallization from a plane strain deformation structure. However, for the A6063 alloy extruded under conditions close to industrial production, the cube components were mainly formed by recovery and continuous recrystallization.
Highlights
The texture of aluminium and aluminium alloys has been investigated for a long time
We previously investigated the influence of extrusion conditions on the texture of the A6063 alloy under conditions close to industrial production
From the inverse pole figure map (IPF-map) in Fig. 3 (a), the same color is observed to be continuously arranged along the metal flow
Summary
The texture of aluminium and aluminium alloys has been investigated for a long time. In the 1920s, studies reported the [111] orientation structure developed in the drawing direction of an aluminium wire rod and a double fiber structure of [111] and [100] in a round wire [1]. Niisato et al [6] described the cross-sectional shape of extruded Al-ZnMg-Cu alloys and the texture and material strength after extrusion. They described the recovery and recrystallized structures and their crystal orientations. Wu et al [7] reported the effect of Si content in extruded Al-Si-Mg alloys on the recovery structure and recrystallization behavior after extrusion. In this context, we previously investigated the influence of extrusion conditions on the texture of the A6063 alloy under conditions close to industrial production. We report on the details of the microstructure and texture formation process from the extrusion chamber to the bearing part of the hot extruded material of the A6063 alloy
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