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<p>In this study, the effect of W and Cu alloying on microstructure, phase composition and high-temperature oxidation resistance of an as-cast AlCoCrFeNiCu<sub>0.25</sub>W<sub>0.1</sub> high-entropy alloy (HEA) is investigated. The as-cast AlCoCrFeNiCu<sub>0.25</sub>W<sub>0.1</sub> HEA exhibits a dual-phase microstructure consisting of adjacent layers of Cr- and Fe-rich FCC and Al- and Ni-rich BCC phases. It was found that Cu is incorporated into FCC and BCC solid solutions, while W is partially incorporated into FCC and mainly released as (Fe,Cr)<sub>2</sub>W Laves phase. AlCoCrFeNiCu<sub>0.25</sub>W<sub>0.1</sub> HEA exhibited a parabolic oxidation behavior at 1000&#xa0;°C for 30&#xa0;h with a maximum specific mass gain of 0.625&#xa0;mg/cm<sup>2</sup>.</p> Graphical abstract <p></p>

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High temperature oxidation resistance of AlCoCrFeNiCu0.25W0.1 high-entropy alloy

  • 期刊论文

  • 发表日期：

    2025年6月26日

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  • Olga Samoilova,
  • Mikhail Sudarikov,
  • Nataliya Shaburova,
  • Ahmad Ostovari Moghaddam,
  • Evgeny Trofimov

摘要

In this study, the effect of W and Cu alloying on microstructure, phase composition and high-temperature oxidation resistance of an as-cast AlCoCrFeNiCu0.25W0.1 high-entropy alloy (HEA) is investigated. The as-cast AlCoCrFeNiCu0.25W0.1 HEA exhibits a dual-phase microstructure consisting of adjacent layers of Cr- and Fe-rich FCC and Al- and Ni-rich BCC phases. It was found that Cu is incorporated into FCC and BCC solid solutions, while W is partially incorporated into FCC and mainly released as (Fe,Cr)2W Laves phase. AlCoCrFeNiCu0.25W0.1 HEA exhibited a parabolic oxidation behavior at 1000 °C for 30 h with a maximum specific mass gain of 0.625 mg/cm2.

Graphical abstract