Characterization of plastic anisotropy of AA5182-O sheets during prestraining and subsequent annealing

Kaifeng Wang, Bonan Zhou, Jingjing Li, John E. Carsley, Yang Li

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Abstract

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, r, during prestraining and annealing processes, the planar anisotropy coefficient, Dr, 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.

Original languageEnglish (US)
Article number081004
JournalJournal of Manufacturing Science and Engineering, Transactions of the ASME
Volume140
Issue number8
DOIs
StatePublished - Aug 1 2018

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All Science Journal Classification (ASJC) codes

  • Control and Systems Engineering
  • Mechanical Engineering
  • Computer Science Applications
  • Industrial and Manufacturing Engineering

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