Uniaxial compression tests were conducted on Al-3 mass%Mg alloy and Al-3 mass%Mg-0.2 mass%Sc alloy under various amounts of strain and strain rate at 723 K. High temperature yielding phenomena were observed at 723 K and strain rates ranging from 1:0 Â 10 À4 s À1 to 5:0 Â 10 À3 s À1 . Texture examination elucidated that fiber textures were constructed in all the deformation conditions. Texture measurement revealed that the main component of the fiber texture changed from f011g þ f001g to {001} with an increase in strain when the viscous motion of dislocation is the dominant deformation mechanism in the binary alloy. Texture changes are also seen at strength of the {001} component in the binary alloy that increased with increase in strain rates between 5:0 Â 10 À4 s À1 and 5:0 Â 10 À3 s À1 up to a strain of À1:0, while in the ternary alloy, neither variation of the pole density at (011) nor (001) in inverse pole figure is observed in the same deformation conditions. It is considered that Al 3 Sc precipitates contribute to the suppression of grain boundary migration. This means that the grain boundary migration contribute to the development of {001} fiber texture.

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Uniaxial compression deformation is conducted on solid solution Al-3mass%Mg and Al-3mass%Mg-0.2mass%Sc with Al3Sc precipitates in the strain rates ranging from 1.0×10-4s-1 to 5.0×10-3s-1 at 723K. High temperature yielding is observed. Fiber texture is constructed in all the deformation conditions. While the main component of the fiber texture changes from {011} to {001} in Al-3mass%Mg alloy with an increase in strain rate, no big change in texture main component is seen for Al-3mass%Mg-0.2mass%Sc alloy with Al3Sc precipitates. It is experimentally shown that the development of {001} fiber texture can be attributed to the grain boundary migration.

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