Microtextural evolution of different TRC AA8006 alloy sections with homogenization |
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| Affiliation: | State Key Laboratory of Solidification Processing, Northwestern Polytechnical University, Xi’an 710072, China |
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| Abstract: | Grain microtexture evolution in twin-roll cast AA8006 alloy sheets subjected to different treatments was investigated using elec-tron backscatter diffraction. The textures of rolling-transverse and normal-transverse sections were characterized in original as-cast twin-roll casting and cold-rolled samples as well as samples homogenized at 500°C for 8 h and at 580°C for 4 h. It is found that grains on both the rolling-transverse and normal-transverse sections of cold-rolled samples are made finer by rolling deformation and coarsened after homog-enization. Annealing temperature has a stronger effect on the microstructural evolution than annealing time. The grain growth direction is parallel to the normal-transverse section, while grain deformation is more stable on the rolling direction than on the normal direction. The rolling orientations display more obvious anisotropy on the normal-transverse sections than on the rolling-transverse sections. Grain recrys-tallization and growth occur much easier on the normal-transverse section than on the rolling-transverse section for samples homogenized at 500°C for 8 h. A special misorientation relationship between cold deformation texture, such as S orientation{123}<634>and cube orienta-tion<110>|Xaxis cubic], and recrystallization texture after homogenization, such as R orientation{124}<211>and P orientation{011}<122>, is observed. |
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| Keywords: | aluminum alloys textures twin-roll casting homogenization |
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