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<p>Alloying effectively enhances mechanical properties of alloys, including high-entropy alloys (HEAs). Using vacuum arc melting, FeCoCrNiWx (<i>x</i> = 0.2–1) HEAs were synthesized to study tungsten’s role in phase evolution, microstructure, and properties. W<sub>0.2</sub> showed a single FCC phase, W<sub>0.4</sub> had FCC with minor μ phase, while higher W content (0.6–1) formed FCC, BCC, and μ phases. Tungsten addition refined grains, promoted eutectic dendrites, and improved hardness and strength. The equiatomic FeCoCrNiW alloy achieved 435 HV microhardness, 657&#xa0;MPa yield strength, and 23% fracture strain. Strengthening arose from grain refinement, solid solution, and interface hardening, indicating promise for industrial applications.</p>

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Microstructure Evolution and Mechanical Properties of as-Cast FeCoCrNiWx High-Entropy Alloys

  • 期刊论文

  • 发表日期：

    2026年3月28日

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  • Vinay Kumar Soni,
  • K. Raja Rao,
  • Tukesh Ram Sahu,
  • Sudip Kumar Sinha

摘要

Alloying effectively enhances mechanical properties of alloys, including high-entropy alloys (HEAs). Using vacuum arc melting, FeCoCrNiWx (x = 0.2–1) HEAs were synthesized to study tungsten’s role in phase evolution, microstructure, and properties. W0.2 showed a single FCC phase, W0.4 had FCC with minor μ phase, while higher W content (0.6–1) formed FCC, BCC, and μ phases. Tungsten addition refined grains, promoted eutectic dendrites, and improved hardness and strength. The equiatomic FeCoCrNiW alloy achieved 435 HV microhardness, 657 MPa yield strength, and 23% fracture strain. Strengthening arose from grain refinement, solid solution, and interface hardening, indicating promise for industrial applications.