DEFORMATION MICROSTRUCTURE AND TEXTURE IN HOT WORKED ALUMINUM-ALLOYS

Three non-heat-treatable aluminium based materials (AA 1050, AA 1050 1%Mn, and AA 1050 + 1%Mg) were deformed by plane strain compression ( strains of 0 . 5 to 2, strain rates of 0 . 25 to 25 s(-1)) at elevated temperature (300 to 500 degrees C). The resulting microstructures and textures were studied using optical and back scattered electron micro scopy and neutron diffraction. Trends in the development of the deform ation microstructure and texture with deformation parameter s were not ed. It was found that the amount of cube texture in the deformed mater ial decreases as the str ain increases. The Zener-Hollomon parameter i s not suitable for describing the evolution of cube texture during hot deformation in AA 1050. The addition of 1%Mn ol 1%Mg to AA 1050 has l ittle effect on the trends of texture development during hot working. The subgrain size in these alloys decreases with increasing Zener-Holl omon parameter, but the strain has little effect. The misorientation b etween neighbouring subgrains appears to be approximately independent of deformation parameters in the range of deformation conditions studi ed. (C) 1996 The Institute of Materials.