Friction-Stir Welding of Zr-Modified AA5083 Sheets in Different Conditions

Abstract:

The effect of friction-stir welding (FSW) on microstructure and mechanical properties of Zr-modified AA5083 aluminum alloy was studied. FSW was observed to lead to the formation of fully recrystallized ultrafine-grained microstructures and preservation of nanoscale dispersoids in stir zone. The joint efficiency of the friction-stir welds for ultimate tensile strength was found to be 94% and 74% in the hot-rolled and cold-rolled preprocessed material conditions. The stir zone microstructure was predicted to be stable against abnormal grain growth during post-weld heat treatment.

• Periodical: Materials Science Forum (Volume 877)
• Pages: 365-370
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.877.365
• Online since: November 2016
• Authors: Sergey Malopheyev*, Sergey Mironov, Rustam Kaibyshev
• Keywords: Aluminium Alloy, Friction Stir Welding, Grain Refinement, Mechanical Properties, Ultra-Fine Grained Structure

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