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<p>The effect of friction time (6 and 8&#xa0;s) on the microstructure, texture, and mechanical properties variations near the welded interface of dissimilar AISI 52100/AISI 1015 steels joints produced by direct drive friction welding (DDFW) was explored using electron backscatter diffraction (EBSD), Vickers microhardness, and tensile tests. At the AISI 52100 side (stationary side), the microstructure features were not affected by the DDFW process, but the texture demonstrated the development of shear texture components. The AISI 1015 side (rotating side) exhibits a duplex microstructure of ferrite and austenite phases with significant grain refinement. Dynamic recrystallization (DRX) is the primary grain refinement mechanism. Texture analysis showed that ferrite grains developed typical BCC shear textures with a cube component, whereas austenite grains exhibited shear-dominated FCC texture. The Vickers microhardness increased on both sides of the welded joint with longer friction duration. The tensile test results revealed that joint efficiency enhanced from 58.8 to 72.4% as friction time increased. The improvement in mechanical performance is attributed to increased plastic deformation, higher heat input leading to microstructural refinement, and a higher fraction of austenite phase. The results indicate that optimizing friction time is essential for achieving improved bonding and mechanical properties in dissimilar steel joints.</p>

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Effect of Friction Time on the Welded Zone Properties of AISI 52100/AISI 1015 Steels Jointed by Direct Drive Friction Welding

  • 期刊论文

  • 发表日期：

    2026年6月26日

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  • Fadi Abouhilou,
  • Hiba Azzeddine,
  • Feth-Ellah Mennane,
  • François Brisset,
  • Thierry Baudin,
  • Ammar Jabbar Hassan

摘要

The effect of friction time (6 and 8 s) on the microstructure, texture, and mechanical properties variations near the welded interface of dissimilar AISI 52100/AISI 1015 steels joints produced by direct drive friction welding (DDFW) was explored using electron backscatter diffraction (EBSD), Vickers microhardness, and tensile tests. At the AISI 52100 side (stationary side), the microstructure features were not affected by the DDFW process, but the texture demonstrated the development of shear texture components. The AISI 1015 side (rotating side) exhibits a duplex microstructure of ferrite and austenite phases with significant grain refinement. Dynamic recrystallization (DRX) is the primary grain refinement mechanism. Texture analysis showed that ferrite grains developed typical BCC shear textures with a cube component, whereas austenite grains exhibited shear-dominated FCC texture. The Vickers microhardness increased on both sides of the welded joint with longer friction duration. The tensile test results revealed that joint efficiency enhanced from 58.8 to 72.4% as friction time increased. The improvement in mechanical performance is attributed to increased plastic deformation, higher heat input leading to microstructural refinement, and a higher fraction of austenite phase. The results indicate that optimizing friction time is essential for achieving improved bonding and mechanical properties in dissimilar steel joints.