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<p>The present work developed a novel soft-magnetic Fe<sub>40.63</sub>Co<sub>25</sub>Ni<sub>25</sub>Al<sub>6.25</sub>Ti<sub>2.5</sub>Nb<sub>0.62</sub> alloy with stable soft-magnetic and prominent mechanical properties via the cluster formula approach. This alloy exhibits a fully equiaxed grain with a single face-centered cubic (FCC) structure. Meanwhile, this alloy shows a great microstructure stability, as evidenced by the fact that even after aging for 50&#xa0;h at 1123&#xa0;K, there was no other second-phase precipitation, except for some B2 particles on the grain boundaries. This stable microstructure enables the solutionized and aged alloys to obtain a comparable soft-magnetic property with a saturation magnetization of <i>M</i><sub>S</sub> = 127.6–131.3 Am<sup>2</sup>/kg and a coercivity of <i>H</i><sub>C</sub> = 132.1–197.4 A/m. Moreover, the current alloy possesses a good mechanical property with yield strength of <i>σ</i><sub>YS</sub> = 422–467&#xa0;MPa and elongation to fracture of <i>ε</i> = 46–51%. Strengthening mechanism for high yield strength and magnetic behavior were further discussed.</p> Graphical abstract <p></p>

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Microstructural dependence of mechanical and soft-magnetic properties for Fe–Co–Ni–Al–Ti–Nb multi-principal element alloy

  • 期刊论文

  • 发表日期：

    2025年6月16日

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  • Ruoyao Wang,
  • Rui Wang,
  • Zhenhua Wang,
  • Ben Niu,
  • Yuxian Yang,
  • Beibei Jiang,
  • Haiyang Liu,
  • Qing Wang

摘要

The present work developed a novel soft-magnetic Fe40.63Co25Ni25Al6.25Ti2.5Nb0.62 alloy with stable soft-magnetic and prominent mechanical properties via the cluster formula approach. This alloy exhibits a fully equiaxed grain with a single face-centered cubic (FCC) structure. Meanwhile, this alloy shows a great microstructure stability, as evidenced by the fact that even after aging for 50 h at 1123 K, there was no other second-phase precipitation, except for some B2 particles on the grain boundaries. This stable microstructure enables the solutionized and aged alloys to obtain a comparable soft-magnetic property with a saturation magnetization of MS = 127.6–131.3 Am2/kg and a coercivity of HC = 132.1–197.4 A/m. Moreover, the current alloy possesses a good mechanical property with yield strength of σYS = 422–467 MPa and elongation to fracture of ε = 46–51%. Strengthening mechanism for high yield strength and magnetic behavior were further discussed.

Graphical abstract