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<p>This study looks at how the amount of energy used changes the effect of the microstructure and tribological properties of the AlCrCoFeMnNi HEA layer that is welded to a Ti-6Al-4&#xa0;V base using the TIG method. Metallic powders of Al, Cr, Co, Mn, and Ni were mixed with PVA to prepare a preplaced HEA paste. A TIG torch with straight polarity and three welding currents (50, 80, and 120A) were used to melt the preplaced paste. The results showed that the grain size and diffusion of Ti from the substrate to the HEA cladding layer increased with increasing input energy. The x-ray diffraction analysis revealed that the layers consisted of the BCC, FCC, Al/Ni-rich B2, and Fe-Cr phases, along with a small amount of the Laves phases. Additionally, the microscopy images demonstrated the achievement of metallurgical bonding between the substrate and the cladding layer, with the microstructure of this region consisting of plain growth, columnar crystals, and shrinkage cavities. It was also found that&#xa0;the lowest rate of wear was 6.05x10<sup>-5</sup>, which occurred at the lowest input energy, and it increased with increasing input energy.</p>

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Microstructural and Tribological Properties of Ti-6Al-4 V Alloy Cladded by AlCrCoFeMnNi High Entropy Alloy by the Use of TIG Method

  • 期刊论文

  • 发表日期：

    2025年7月23日

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  • Falih Alazzawi,
  • Hossein Aghajani,
  • Abbas Kianvash

摘要

This study looks at how the amount of energy used changes the effect of the microstructure and tribological properties of the AlCrCoFeMnNi HEA layer that is welded to a Ti-6Al-4 V base using the TIG method. Metallic powders of Al, Cr, Co, Mn, and Ni were mixed with PVA to prepare a preplaced HEA paste. A TIG torch with straight polarity and three welding currents (50, 80, and 120A) were used to melt the preplaced paste. The results showed that the grain size and diffusion of Ti from the substrate to the HEA cladding layer increased with increasing input energy. The x-ray diffraction analysis revealed that the layers consisted of the BCC, FCC, Al/Ni-rich B2, and Fe-Cr phases, along with a small amount of the Laves phases. Additionally, the microscopy images demonstrated the achievement of metallurgical bonding between the substrate and the cladding layer, with the microstructure of this region consisting of plain growth, columnar crystals, and shrinkage cavities. It was also found that the lowest rate of wear was 6.05x10-5, which occurred at the lowest input energy, and it increased with increasing input energy.