Abstract
Texture evolution during indirect extrusion of cylindrical profiles of an AlSiMgMn aluminium alloy was investigated in the present work. The effect of extrusion temperature on texture development, through‐thickness texture variations and texture variations along the length of the extruded profiles were investigated. In all cases a combined 〈100〉 and 〈111〉 fibre texture developed. Generally, the 〈111〉 fibre was sharper than the 〈100〉 fibre. The texture evolution was rather similar along the length of the profile, while the variations through the thickness were considerable. In a region midways between the centre and the surface of the profiles, the 〈100〉 fibre was weakened, and in the surface regions the two fibres were significantly rotated. The texture measurements showed a strong dependence on extrusion temperature, in the sense that the higher the temperature, the sharper the 〈100〉 fibre texture. The influence of texture variations on formability were also investigated.
Highlights
IntroductionAn alternative is indirect extrusion where the billet is stationary and the die is pressed towards the billet
In the most extreme cases the surface textures were so strongly rotated that they approached a { 110}RD(335)AD, i.e. a component with a (110) axis in the radial direction and a (335) axis in the axial direction (not so far from the {011 } (211) Bs deformation texture obtained in rolling of FCC metals)
The results showed that two sharp fibre textures developed in all extrusion experiments: a (100) and a /11 l) fibre texture
Summary
An alternative is indirect extrusion where the billet is stationary and the die is pressed towards the billet. The latter has the advantage of a lower required ram force due to a slightly different flow pattern. The texture aspect has been investigated in detail in the present work In this investigation the effect of a variation in extrusion temperature has been focused, and the texture variations through the thickness and along a profile have been characterized. The influence of texture variations on formability has been studied The latter is important since extruded profiles are often subjected to subsequent forming operations like forging and bending
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