This paper described the effects of prestraining and annealing on plastic anisotropy (r-value) of aluminum alloy 5182-O sheets including two prestrain paths and two annealing conditions. During the prestraining and annealing processes, r-value changed depending on prestrain paths and annealing conditions. Although there were slight changes of the normal anisotropy coefficient, , during prestraining and annealing processes, the planar anisotropy coefficient, , increased significantly, especially for the uniaxial prestrain condition. This could accelerate the development of earing during a sheet forming operation. Also, the corresponding sheet textures in rolling direction (RD)/TD plane after prestraining and annealing processes were observed through electron backscatter diffraction (EBSD) analysis to explain the r-value changes, where the viscoplastic self-consistent (VPSC) model was used to correlate the determined texture to measured r-values. It is found that the sheet texture also had significant changes relating to the prestrain paths and annealing conditions resulting in varied r-values.
Characterization of Plastic Anisotropy of AA5182-O Sheets During Prestraining and Subsequent Annealing
Manuscript received January 29, 2018; final manuscript received May 1, 2018; published online May 21, 2018. Assoc. Editor: Yannis Korkolis.
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Wang, K., Zhou, B., Li, J., Carsley, J. E., and Li, Y. (May 21, 2018). "Characterization of Plastic Anisotropy of AA5182-O Sheets During Prestraining and Subsequent Annealing." ASME. J. Manuf. Sci. Eng. August 2018; 140(8): 081004. https://doi.org/10.1115/1.4040157
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