Microstructure and Corrosion Behavior in Al-Mg Based Alloys Subjected to Continuous Cyclic Bending and Annealing

Abstract:

Coarsening of grain structure in surface layers in 5454 and 5083 Al-Mg based alloy sheets has been made by continuous cyclic bending (CCB), which is a useful straining technique to produce the high strain on the surface layers and the lower strain in the central layer of the sheet, and subsequent annealing. The microstructure on cross-section of the samples was analyzed by SEM/EBSD technique. For the samples before and after CCB/Annealing corrosion behaviors in NaCl or HCl solution were investigated. As a result, the samples subjected to CCB/Annealing showed higher corrosion resistance on coarse-grained surface layers. Less change in the corrosive solutions was observed on the grains parallel to {001} or {111} plane.

• Periodical: Materials Science Forum (Volumes 654-656)
• Pages: 1002-1005
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.654-656.1002
• Online since: June 2010
• Authors: Yoshimasa Takayama, Yuki Kido, Hajime Kato, Hideo Watanabe
• Keywords: Al-Mg Alloy, Continuous Cyclic Bending, Corrosion, Crystallographic Orientation, Electron Backscatter Diffraction (EBSD), Grain Boundary, Scanning Electron Microscope (SEM)

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