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<p>High-entropy alloys (HEAs) have attracted extensive attention due to their unique compositional design and outstanding mechanical properties. Research indicates that these alloys maintain exceptional performance even at low temperatures, demonstrating great potential as structural materials for extreme environments. Recent studies reveal that deep cryogenic treatment can effectively enhance the ductility of HEAs. This work systematically investigates the influence of deep cryogenic treatment on the mechanical properties of AlCr<sub>x</sub>FeNi<sub>1.5</sub>Cu<sub>0.5</sub> (<i>x</i> = 1.25,1.5) HEAs. The results show that deep cryogenic treatment significantly improves hardness and compressive strength. Specifically, the AlCr<sub>1.25</sub>FeNi<sub>1.5</sub>Cu<sub>0.5</sub> alloy subjected to 48-h deep cryogenic treatment achieves a compressive strength of 2315.18&#xa0;MPa while retaining a plastic strain of 17.4%. These findings suggest that optimized deep cryogenic treatment processes can enable HEAs to serve as high-performance, long-life next-generation structural materials.</p>

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Deep Cryogenic Treatment on the Mechanical Properties of AlCrxFeNi1.5Cu0.5 High-Entropy Alloys

  • 期刊论文

  • 发表日期：

    2025年6月25日

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  • Chunyan Li,
  • Tianyu Chen,
  • Zihui Tang,
  • Shuyan Zhang,
  • Xiaocheng Li,
  • Shengzhong Kou

摘要

High-entropy alloys (HEAs) have attracted extensive attention due to their unique compositional design and outstanding mechanical properties. Research indicates that these alloys maintain exceptional performance even at low temperatures, demonstrating great potential as structural materials for extreme environments. Recent studies reveal that deep cryogenic treatment can effectively enhance the ductility of HEAs. This work systematically investigates the influence of deep cryogenic treatment on the mechanical properties of AlCrxFeNi1.5Cu0.5 (x = 1.25,1.5) HEAs. The results show that deep cryogenic treatment significantly improves hardness and compressive strength. Specifically, the AlCr1.25FeNi1.5Cu0.5 alloy subjected to 48-h deep cryogenic treatment achieves a compressive strength of 2315.18 MPa while retaining a plastic strain of 17.4%. These findings suggest that optimized deep cryogenic treatment processes can enable HEAs to serve as high-performance, long-life next-generation structural materials.