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<p>In this study, an AlCuMnNi equiatomic high-entropy alloy (HEA) was applied as a coating on a 4140-steel substrate. The experimental process was divided into two stages. First, AlCuMnNi HEA powder was fabricated using powder metallurgy. Subsequently, this alloy powder was applied as a coating using the mechanical alloying technique with different grinding times. The microstructure and phases present in the AlCuMnNi HEA powder were analyzed by scanning electron microscopy (SEM), X-ray energy-dispersive spectroscopy (EDS), and X-ray diffraction (XRD) analysis. The microstructure, microhardness, and corrosion properties of the AlCuMnNi coatings in saline solution (22% NaCl) were also evaluated. According to the electrochemical tests, the corrosion resistance of the coatings was superior to that of the 4140-steel substrate.</p> Graphical abstract <p></p>

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Synthesis of high-entropy alloy AlCuMnNi by mechanical alloying for application as a coating on 4140-steel substrate

  • 期刊论文

  • 发表日期：

    2025年6月26日

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  • E. Servín,
  • A. Molina-Ocampo,
  • S. R. Gonzaga,
  • A. Torres-Islas,
  • M. Serrano

摘要

In this study, an AlCuMnNi equiatomic high-entropy alloy (HEA) was applied as a coating on a 4140-steel substrate. The experimental process was divided into two stages. First, AlCuMnNi HEA powder was fabricated using powder metallurgy. Subsequently, this alloy powder was applied as a coating using the mechanical alloying technique with different grinding times. The microstructure and phases present in the AlCuMnNi HEA powder were analyzed by scanning electron microscopy (SEM), X-ray energy-dispersive spectroscopy (EDS), and X-ray diffraction (XRD) analysis. The microstructure, microhardness, and corrosion properties of the AlCuMnNi coatings in saline solution (22% NaCl) were also evaluated. According to the electrochemical tests, the corrosion resistance of the coatings was superior to that of the 4140-steel substrate.

Graphical abstract