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<p>The paper presents the results of a microstructure study of the near-boundary regions of aluminum and the aluminum‑magnesium alloy AMg6 in three‑layer Ti/Al/AMg6 joints produced by explosive welding, with ultrasonic vibrations applied to the aluminum and the alloy. Electron backscatter diffraction (EBSD) results showed that ultrasonic treatment promotes dynamic recrystallization of aluminum in the region adjacent to titanium, accompanied by an increase in the fraction and extent of high‑angle boundaries and a reduction in mean kernel average misorientation (KAM). A wave profile formed at the aluminum–AMg6 interface, and the AMg6 structure consisted of three regions with different morphologies: a recrystallized layer, a layer with a fibrous morphology, and a region of heavily deformed grains. Focused ion beam (FIB) microscopy showed that ultrasonic application during welding increases the thickness of the recrystallized layer in AMg6.</p>

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Investigation of the structure of the joint zone in Ti/Al/Aluminum alloy composites produced by explosive welding with ultrasonic treatment

  • 期刊论文

  • 发表日期：

    2026年6月25日

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  • Evgeniy Kuzmin,
  • Mikhail Korolev,
  • Valentin Kharlamov,
  • Sergei Kuzmin,
  • Vladimir Lysak

摘要

The paper presents the results of a microstructure study of the near-boundary regions of aluminum and the aluminum‑magnesium alloy AMg6 in three‑layer Ti/Al/AMg6 joints produced by explosive welding, with ultrasonic vibrations applied to the aluminum and the alloy. Electron backscatter diffraction (EBSD) results showed that ultrasonic treatment promotes dynamic recrystallization of aluminum in the region adjacent to titanium, accompanied by an increase in the fraction and extent of high‑angle boundaries and a reduction in mean kernel average misorientation (KAM). A wave profile formed at the aluminum–AMg6 interface, and the AMg6 structure consisted of three regions with different morphologies: a recrystallized layer, a layer with a fibrous morphology, and a region of heavily deformed grains. Focused ion beam (FIB) microscopy showed that ultrasonic application during welding increases the thickness of the recrystallized layer in AMg6.