Uniaxial compression tests were conducted on Al-3wt%Mg and Al-3Mg-0.2wt%Sc alloys using various degrees of strain and strain-rate at 723K. High-temperature yielding phenomena were observed at 723K, and strain-rates ranging from 1 x 10-4 to 5 x 10-3/s. Texture examination showed that fibre textures were produced under all deformation conditions. Texture measurements revealed that the main component of the fibre texture changed from 011+{001} to {001} with increasing strain when the viscous motion of dislocations was the predominant deformation mechanism in the binary alloy. The strength of the {001} component in the binary alloy increased with increasing strain-rates (between 5.0 x 10-4 and 5.0 x 10-3/s, up to a strain of -1.0) while, in the ternary alloy, neither a variation in the pole density at (011) nor (001) in the inverse pole figure was observed under the same deformation conditions. It was considered that Al3Sc precipitates contributed to the suppression of grain-boundary migration. This implied that the grain-boundary migration contributed to the development of the {001} fibre texture.

Influence of Grain Boundary Migration on {001} Texture Formation in Al-3mass%Mg Based Alloys during High Temperature Compression Deformation. K.Okayasu, H.Takekoshi, H.Fukutomi: Materials Transactions, 2007, 48[8], 2002-7