Roll forming properties and texture evolution law of 7075 aluminum alloy
The effects of different roll forming angles on the microstructure of 7075-T651 aluminum alloy sheets were investigated using optical microscope (OM) and electron backscatter diffraction (EBSD) techniques,and their mechanical properties were evaluated in combination with microhardness experiments. The results indicate that during the roll-forming process with a forming angle ranging from 0° to 20°,the grains at the inner and outer edges are refined,the texture types underwent random transformations,and the texture strength significantly decreases. Meanwhile,the dislocation density and the proportion of low-angle grain boundaries at both the inner and outer edges significantly increases. When the forming angle increases to 30°,the grain sizes at the inner and outer edges slightly increase compared to the previous stage,the dislocation density and the proportion of low-angle grain boundaries at the inner edge continue to rise,while those at the outer edge show a downward trend. However,the textures at the inner and outer edges tend to be consistent,mainly consisting of strong {012}〈100〉 texture and weaker Brass texture;the roll forming process significantly improve the overall hardness of 7075-T651 aluminum alloy sheets.
roll forming7075 aluminum alloymicrostructuremechanical property
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