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Abstract <p>This study investigates the effects of solution and aging treatments on the microstructure and mechanical properties of as-deposited Al<sub>17</sub>Cr<sub>10</sub>Fe<sub>36</sub>Ni<sub>35</sub>Mo<sub>2</sub> FCC/B2 dual-phase high-entropy alloy. The B2 phase within the dendrites dissolves, and the lamellar structure disappears, resulting in a dual-phase microstructure of B2 dendrites and interdendritic FCC phases after heat treatment. The tensile strength of the solution and aging alloy increased from 1266&#xa0;MPa to 1441&#xa0;MPa. The enhancement in strength is attributed to the precipitation of nanoscale L1<sub>2</sub> and spherical BCC phases within the FCC and B2 matrices. This work provides valuable insights into precipitation strengthening strategies for additive-manufactured dual-phase high-entropy alloys.</p> Graphical Abstract <p></p>

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Precipitation Strengthening in Additive-Manufactured Al17Cr10Fe36Ni35Mo2 FCC/B2 Dual-Phase High-Entropy Alloy

  • 期刊论文

  • 发表日期：

    2025年9月5日

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  • Quan Xu,
  • Zhou Hua,
  • Zishu Chai,
  • Kexuan Zhou,
  • Yuhao Jia,
  • Guang Liu,
  • Zhijun Wang

摘要

Abstract

This study investigates the effects of solution and aging treatments on the microstructure and mechanical properties of as-deposited Al17Cr10Fe36Ni35Mo2 FCC/B2 dual-phase high-entropy alloy. The B2 phase within the dendrites dissolves, and the lamellar structure disappears, resulting in a dual-phase microstructure of B2 dendrites and interdendritic FCC phases after heat treatment. The tensile strength of the solution and aging alloy increased from 1266 MPa to 1441 MPa. The enhancement in strength is attributed to the precipitation of nanoscale L12 and spherical BCC phases within the FCC and B2 matrices. This work provides valuable insights into precipitation strengthening strategies for additive-manufactured dual-phase high-entropy alloys.

Graphical Abstract