The Effect Of Initial Texture And Precipitation On Rolling And Recrystallization Texture

Aluminum alloy has many outstanding performance to make it rapid developmentand wide application in the construction, transportation, electronic industry, packaging andprinting, aerospace, chemical and food industry, etc. Considering the current increasingdemand of aluminum alloy, we should design more optimized processes to meet highmechanical properties, good formability and energy saving requirements. So the control ofdeformation and recrystallization texture so as to control its formability in actualproduction has an important meaning. the initial texture of aluminum band before coldrolling has an impact on rolling and annealing texture. Quantify the effect of initial texturefor simulation and prediction aluminium alloy plate texture plays a very important role.The finally microstructure and texture of aluminum alloy products depends on thevolume fraction, size and distribution of precipitation, and the formability of aluminumalloy depends on the microstructure and texture. Therefore, the aim of this paper is toreveal the effect of precipitate on microstructure and texture, so as to optimizingmanufacturing techniques to improve the mechanical properties and the formability ofaluminium alloy products.In this work, AA1050aluminum alloy sheets and CC3105aluminum alloy sheetshas been pre-heat treatment and cold rolled to different reductions followed byrecrystallization annealing. The microstructure and textures of cold-rolled sheets andannealed sheets have been studied by polarization microscope and X-ray diffracmeter,respectively. And quantitative analysis volume fraction through an improved calculationmethod. The initial Goss texture1050aluminum alloy in rolling and annealing processtexture evolution and before cold rolling of precipitation of3105aluminum alloyrecrystallization kinetics, final grain size and recrystallization texture influence. The effectof initial Goss orientation of AA1050aluminum alloy on rolling and annealing textureand the precipitation of CC3105aluminum alloy before cold rolling on recrystallizationkinetics, final grain size and recrystallization texture have been studied.The results show that, during the rolling process, under low deformation the Goss orientation grains are stable, and in high rolling reduction the Goss orientation grainsrotated to B orientation. Final β fiber rolling texture strength is weak, the B orientationslightly higher than other components in the fiber texture. Establish an equation of1050aluminum alloy texture volume vs. true strain, which can simulate texture evolution in theprocess of rolling. When the deformation of1050aluminum alloy is less than40%,recrystallization crystal nucleus and the matrix with the same orientation, in thesubsequent process of grow up has a40°<111> orientation relationship between nucleusand matrix. Finally form a {10324}<362> orientation. And when the deformation ismore than40%, the recrystallization grain nuclear in S orientation grain boundary and Bsorientation band, developed a large number of R and Goss orientation grain. Theprecipitation formed in599°C annealing lead to a random recrystallization texture, and thesmaller precipitated formed in371°C annealing promote the formation of the cube texture.