Scholarlink

<p>The current study investigates the effects of edge preparation, specifically Plain Edge (PE) and Zig-Zag Edge (ZE), on the microstructure and corrosion behavior of dissimilar friction stir welded (FSW) joints made from AA5083 (advancing side) and AA8011 (retreating side) aluminium alloys. Microstructural analysis revealed significant grain refinement in the nugget zones of both PE and ZE samples. ZE had finer grains (~ 6.1&#xa0;μm) than PE (~ 7.4&#xa0;μm), indicating improved mechanical interlocking and material flow. X-ray diffraction (XRD) identified dominant intermetallic phases, including Al₃Mg₂, Al₃Fe, and Al₆Mn. ZE samples demonstrated broader and less intense peaks, indicating refined microstructure and potential compressive residual stresses. Potentio dynamic polarization tests at 3.5 wt% NaCl solution improved corrosion resistance in ZE samples, resulting in a higher noble corrosion potential (Ecorr = 0.074&#xa0;V) and pitting resistance (Epit = 0.454&#xa0;V) than PE or base materials. Optical examination of corroded morphologies confirmed electrochemical findings, with ZE joints showing the mildest corrosion attack. The study concludes that Zig-Zag edge preparation enhances grain refinement, reduces the formation of weak intermetallics, and significantly improves corrosion resistance in dissimilar FSW joints of AA5083-AA8011.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Effect of zig-zag edge preparation on microstructure and corrosion behavior of AA5083–AA8011 friction stir welds

  • 期刊论文

  • 发表日期：

    2026年3月31日

查看全文
  • Simhadri Raju Juvvala,
  • A B Koteswara Rao,
  • G Ranga Janardhana

摘要

The current study investigates the effects of edge preparation, specifically Plain Edge (PE) and Zig-Zag Edge (ZE), on the microstructure and corrosion behavior of dissimilar friction stir welded (FSW) joints made from AA5083 (advancing side) and AA8011 (retreating side) aluminium alloys. Microstructural analysis revealed significant grain refinement in the nugget zones of both PE and ZE samples. ZE had finer grains (~ 6.1 μm) than PE (~ 7.4 μm), indicating improved mechanical interlocking and material flow. X-ray diffraction (XRD) identified dominant intermetallic phases, including Al₃Mg₂, Al₃Fe, and Al₆Mn. ZE samples demonstrated broader and less intense peaks, indicating refined microstructure and potential compressive residual stresses. Potentio dynamic polarization tests at 3.5 wt% NaCl solution improved corrosion resistance in ZE samples, resulting in a higher noble corrosion potential (Ecorr = 0.074 V) and pitting resistance (Epit = 0.454 V) than PE or base materials. Optical examination of corroded morphologies confirmed electrochemical findings, with ZE joints showing the mildest corrosion attack. The study concludes that Zig-Zag edge preparation enhances grain refinement, reduces the formation of weak intermetallics, and significantly improves corrosion resistance in dissimilar FSW joints of AA5083-AA8011.