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<p>Friction stir processing (FSP) is an innovative method for developing surface composites (SCs) in aluminium alloys. In this study, FSP was carried out to fabricate SCs using Al6061-T6 as the base metal (BM) and SiC as the reinforcement particles (RPs). The microstructure, microhardness, and wear properties of the SCs were evaluated and compared with those of the base alloy. The microhardness and wear behaviour of the samples were evaluated using Vickers microhardness tester and pin-on-disc wear testing method, respectively. Microstructural analysis of the sample was completed using scanning electron microscope (SEM), energy-dispersive spectroscopy (EDS), and electron backscattered diffraction (EBSD) techniques. The number of passes significantly influences the FSP outcomes; therefore, both single pass and multipass were utilized in this research. The findings validated the formation of well-defined equiaxed grain structure in Al6061-T6/SiC composites. The EBSD analysis indicated an average grain size of 15.8&#xa0;µm for 3-pass SC. The findings indicated that the addition of SiC particles to the Al6061-T6 alloy and increasing the number of FSP passes from 1 to 3 significantly improved microhardness, wear, and friction resistance. The 3-pass SCs demonstrated superior mechanical and tribological performance among the developed materials, making it potential choice for tribological applications.</p>

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Tribological Properties of Al6061-T6/SiC Surface Composites Fabricated by Friction Stir Processing: Effect of Multipass

  • 期刊论文

  • 发表日期：

    2025年11月21日

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  • Abdul Jabbar Ansari,
  • Shiv Darshan,
  • Ravindra Kumar Singh,
  • Gagan Bansal,
  • Tarun Soota

摘要

Friction stir processing (FSP) is an innovative method for developing surface composites (SCs) in aluminium alloys. In this study, FSP was carried out to fabricate SCs using Al6061-T6 as the base metal (BM) and SiC as the reinforcement particles (RPs). The microstructure, microhardness, and wear properties of the SCs were evaluated and compared with those of the base alloy. The microhardness and wear behaviour of the samples were evaluated using Vickers microhardness tester and pin-on-disc wear testing method, respectively. Microstructural analysis of the sample was completed using scanning electron microscope (SEM), energy-dispersive spectroscopy (EDS), and electron backscattered diffraction (EBSD) techniques. The number of passes significantly influences the FSP outcomes; therefore, both single pass and multipass were utilized in this research. The findings validated the formation of well-defined equiaxed grain structure in Al6061-T6/SiC composites. The EBSD analysis indicated an average grain size of 15.8 µm for 3-pass SC. The findings indicated that the addition of SiC particles to the Al6061-T6 alloy and increasing the number of FSP passes from 1 to 3 significantly improved microhardness, wear, and friction resistance. The 3-pass SCs demonstrated superior mechanical and tribological performance among the developed materials, making it potential choice for tribological applications.