Abstract
The recrystallization textures of a cold-rolled Al-Mn-Fe-Si model alloy with three different microchemistry states after non-isothermal annealing were studied. The microstructure and texture evolution have been characterized by EBSD. It is clearly demonstrated that the actual microchemistry state as determined by the homogenization procedure strongly influence the recrystallized grain size and recrystallization texture after nonisothermal annealing. High Mn content in solid solution promotes stronger concurrent precipitation and retards recrystallization, which finally leads to a coarse grain structure, accompanied by strong P {011}<566> and/or M {113}<110> texture components and a ND- rotated cube {001}<310> component. A refined grain structure with Cube {001}<100> and/or a weak P component as the main texture components were obtained when the pre-existing dispersoids are coarser and fewer, and concurrent precipitation is limited. The different recrystallization textures are discussed with respect to the effect of second-phase particles using two different heating rates.
Highlights
The recrystallization texture of cold rolled aluminium alloys after annealing has been the subject of numerous investigations as part of a general effort to optimize their mechanical properties
The intensity of the P texture component was found to increase with the initial amount of Mn content during isothermal annealing [4]
The reason why C1-2 has the strongest P texture in the present case is related to the temperature at which it was recrystallized, an aspect which will be discussed in detail in a separate paper
Summary
The recrystallization texture of cold rolled aluminium alloys after annealing has been the subject of numerous investigations as part of a general effort to optimize their mechanical properties. The microchemistry state of the alloys, i.e. amount of solutes and second-phase particle structures, determined by the chemical composition and homogenization procedures of the alloys is an important aspect in studying the recrystallization textures of cold-rolled AlMn-Fe-Si alloys. Much less studies on recrystallization texture after non-isothermal heat treatments exist, which are frequently carried out during industrial thermo-mechanical processing where extended recovery and precipitation of dispersoids are likely to occur, producing complex interactions with recrystallization. The effect of microchemistry on the recrystallization texture of cold-rolled Al-Mn-Fe-Si alloys is analysed after non-isothermal annealing. Published under licence by IOP Publishing Ltd textures obtained are discussed with respect to the second-phase particle structures, including pre-existing dispersoids and concurrently precipitated dispersoids
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