Abstract
AA5083 was subjected to multi-pass friction stir processing (FSP). After FSP passes, elongated grains were transformed into fine equiaxed and recrystallized grains. The variation in grain size after successive passes of FSP was due to the re-distribution and/or re-precipitation of complex second phase particles. Continuous dynamic recrystallization (CDRX) was the dominant restoration mechanism responsible for the microstructural evolution. The fraction of low coincident site lattice (CSL) boundaries was increased due to the atomic interactions related to grain boundary migration during dynamic recrystallization (DRX). Overall, in all the samples cube component {001} 〈100〉 was observed. However, after FSP passes, the intensity of cube component was significantly reduced and strong C component {001} 〈110〉 with A fibre ({111} 〈uvw〉) and B fibre ({hkl} 〈110〉 ) was evolved.
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