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<p>This study investigates the enhancement of dissimilar solid-state weld joints between AA2017 aluminum alloy and XC18 low-carbon steel through the incorporation of graphite reinforcing nanoparticles (GRNPs). Reinforcing nanoparticles are introduced to the weld interface to improve mechanical properties and microstructural stability. The research employs advanced characterization techniques to analyze the microstructure, elemental composition, and mechanical performance of the welded joints. Results indicate a significant improvement of 5.74% in tensile strength of the dissimilar AA2017/XC18 weld joint, attributed to the enhanced material mixing and the homogeneous distribution of elements and nanoparticles at the weld interface. The findings provide that welding AA2017 and XC18 through RFW generates a 40&#xa0;μm-thick intermediate layer with dark color, attributed to the sharp ductility gradient between XC18 and AA2017 under high heat input and forging pressure. Besides, the incorporation of GRNPs induces notable changes in the tensile properties and reduces elasticity in the dissimilar AA2017/XC18 weld joint, leading to a shift in fracture mode.</p>

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Strengthening dissimilar aluminum/steel solid-state weld joints with graphite reinforcing nanoparticles

  • 期刊论文

  • 发表日期：

    2025年12月26日

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  • Houssem Eddine Lakache,
  • Abdelghani Mokdad,
  • Abdelghani May,
  • Adel Belattar

摘要

This study investigates the enhancement of dissimilar solid-state weld joints between AA2017 aluminum alloy and XC18 low-carbon steel through the incorporation of graphite reinforcing nanoparticles (GRNPs). Reinforcing nanoparticles are introduced to the weld interface to improve mechanical properties and microstructural stability. The research employs advanced characterization techniques to analyze the microstructure, elemental composition, and mechanical performance of the welded joints. Results indicate a significant improvement of 5.74% in tensile strength of the dissimilar AA2017/XC18 weld joint, attributed to the enhanced material mixing and the homogeneous distribution of elements and nanoparticles at the weld interface. The findings provide that welding AA2017 and XC18 through RFW generates a 40 μm-thick intermediate layer with dark color, attributed to the sharp ductility gradient between XC18 and AA2017 under high heat input and forging pressure. Besides, the incorporation of GRNPs induces notable changes in the tensile properties and reduces elasticity in the dissimilar AA2017/XC18 weld joint, leading to a shift in fracture mode.