Microstructure and corrosion behavior of the friction stir welded joints made from ultrafine grained aluminum

Marta Lipińska, Ewa Ura-Bińczyk, Lech Olejnik, Andrzej Rosochowski, Malgorzata Lewandowska

Research output: Contribution to journalArticle

3 Citations (Scopus)
15 Downloads (Pure)

Abstract

Joints made from ultrafine grained aluminium alloy 1050 are investigated in order to examine the corrosion behavior and microstructural changes between base materials and stir zones. Samples in the initial state, after four and eight passes of Incremental ECAP (I-ECAP) process were joined with similar plates using Friction Stir Welding. Initially refined microstructure after I-ECAP transformed to homogenous few micron sized grains structure in stir zones. AlFeSi particles present in the microstructure became fragmented during plastic deformation and welding process. The observed minor differences in corrosion resistance include slightly higher values of corrosion potentials but more complex pits' morphology for I-ECAP processed samples comparing to the stir zones.
Original languageEnglish
Number of pages10
JournalAdvanced Engineering Materials
Early online date18 Apr 2017
DOIs
Publication statusE-pub ahead of print - 18 Apr 2017

Keywords

  • ultra fine grained metal
  • aluminium
  • alloys
  • corrosion behaviour
  • corrosion behavior
  • microstructure
  • stir zones
  • I-ECAP

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