INFLUENCE OF PARTICLES ON RECRYSTALLIZATION TEXTURES AND MICROSTRUCTURES OF ALUMINUM-ALLOY-3103

The evolution of recrystallisation textures in the commercial aluminiu m alloy 3103 has been investigated by means of a three-dimensional ori entation distribution function (ODF) analysis. The global texture meas urements were supplemented by local texture measurements by means of t he the electron backscattering pattern (EBSP) technique in SEM and opt ical microscopy, in particular grain size measurements. The evolution of recrystallisation textures was determined by the competition betwee n particle stimulated nucleation (PSN) and nucleation from cube bands. Precipitated particles were found to have a higher retarding effect o n the nucleation from deformation zones around particles than on the n ucleation from cube bands. The result of this is a strong cube texture and a large grain size in cases of a strong precipitation reaction. T his phenomenon has also been discussed theoretically in terms of a sem iquantitative model.