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Laser additive manufacturing method was employed to synthesize AlCrFeNiCuTix high entropy alloys (HEAs) with excellent corrosion and tribological properties. Effects of Ti addition on surface microstructure, phase evolution, corrosion, and tribological characteristics of AlCrFeNiCuTix HEAs were studied. The microstructural properties of the alloys were examined using x-ray diffractometry (XRD) and a scanning electron microscope outfitted with energy dispersive spectroscopy (SEM/EDS). The tribological characteristics of the alloys were investigated using a CETR tribometer. The linear polarization method was utilized to assess the electrochemical behavior of the alloys in a 0.5 M solution of sulfuric acid (H2SO4). The resulted microstructure of the developed AlCrFeNiCu HEA revealed dendritic structure while the addition of Ti resulted in columnar to aquiaxed structure. The combination of body-centered cubic and face-centered cubic (BCC and FCC) solid solution structures was evident in the HEAs. The stabilization of coefficient of friction (CoF) was marked in 3at% Ti addition. The anti-corrosion properties of the developed HEAs improved at 1at% Ti.

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Tribological and Electrochemical Performance of AlCrFeNiCuTix High Entropy Alloy Fabricated via Laser Additive Manufacturing

  • 会议论文

  • 发表日期：

    2025年

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  • N. Malatji,
  • L. R. Kanyane,
  • M. B. Shongwe

摘要

Laser additive manufacturing method was employed to synthesize AlCrFeNiCuTix high entropy alloys (HEAs) with excellent corrosion and tribological properties. Effects of Ti addition on surface microstructure, phase evolution, corrosion, and tribological characteristics of AlCrFeNiCuTix HEAs were studied. The microstructural properties of the alloys were examined using x-ray diffractometry (XRD) and a scanning electron microscope outfitted with energy dispersive spectroscopy (SEM/EDS). The tribological characteristics of the alloys were investigated using a CETR tribometer. The linear polarization method was utilized to assess the electrochemical behavior of the alloys in a 0.5 M solution of sulfuric acid (H2SO4). The resulted microstructure of the developed AlCrFeNiCu HEA revealed dendritic structure while the addition of Ti resulted in columnar to aquiaxed structure. The combination of body-centered cubic and face-centered cubic (BCC and FCC) solid solution structures was evident in the HEAs. The stabilization of coefficient of friction (CoF) was marked in 3at% Ti addition. The anti-corrosion properties of the developed HEAs improved at 1at% Ti.