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<p>Fe(Al, Ta)/Fe<sub>2</sub>Ta(Al) eutectic composites exhibit promising application prospects in aerospace engine hot-end components and high-temperature corrosion-resistant structural parts of advanced energy systems due to excellent combination of the Fe-based solid solutions with the high-temperature strength of Fe<sub>2</sub>Ta(Al) Laves phases during directional solidifcation process. However, coarse grains in unstable growth zones can be observed, which affects the comprehensive properties of the composite. In this paper, homogenization annealing was carried out on the directionally solidified Fe(Al,Ta)/Fe<sub>2</sub>Ta(Al) eutectic composites. Microstructure characteristics, mechanical properties, and corrosion resistance of master alloy, directionally solidified Fe(Al,Ta)/Fe<sub>2</sub>Ta(Al) eutectic composites and homogenization annealing-treated Fe(Al,Ta)/Fe<sub>2</sub>Ta(Al) eutectic composites, were systematically investigated by scanning electron mircroscope (SEM), x-ray diffraction (XRD), tensile testing, friction experiment and electrochemical experiment, respectively. The results show that the coarser reinforced Fe<sub>2</sub>Ta(Al) phases in the unstable growth zones are refined and uniformly distributed after being annealed at 1200&#xa0;°C for 1&#xa0;h. The fracture model of Fe(Al, Ta)/Fe<sub>2</sub>Ta(Al) eutectic composites changes from pure brittle fracture to quasi-cleavage fracture after homogenization annealing. Meanwhile, strength and toughness are also significantly improved. The friction property and corrosion resistance have also been improved. This provides fundamental insights and technical support for solving the room temperature brittleness of Fe-Al intermetallic compounds, which can facilitate and promote the research and development of new high-temperature structural materials.</p>

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Effect of Homogenization Annealing Treatment on Microstructure and Properties of Fe(Al, Ta)/Fe2Ta(Al) Eutectic Composites by Electron Beam Floating Zone Melting

  • 期刊论文

  • 发表日期：

    2026年3月30日

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  • Wenyan Wei,
  • Chunjuan Cui,
  • Zhanpeng Liang,
  • Siyu Yao,
  • Haijun Su

摘要

Fe(Al, Ta)/Fe2Ta(Al) eutectic composites exhibit promising application prospects in aerospace engine hot-end components and high-temperature corrosion-resistant structural parts of advanced energy systems due to excellent combination of the Fe-based solid solutions with the high-temperature strength of Fe2Ta(Al) Laves phases during directional solidifcation process. However, coarse grains in unstable growth zones can be observed, which affects the comprehensive properties of the composite. In this paper, homogenization annealing was carried out on the directionally solidified Fe(Al,Ta)/Fe2Ta(Al) eutectic composites. Microstructure characteristics, mechanical properties, and corrosion resistance of master alloy, directionally solidified Fe(Al,Ta)/Fe2Ta(Al) eutectic composites and homogenization annealing-treated Fe(Al,Ta)/Fe2Ta(Al) eutectic composites, were systematically investigated by scanning electron mircroscope (SEM), x-ray diffraction (XRD), tensile testing, friction experiment and electrochemical experiment, respectively. The results show that the coarser reinforced Fe2Ta(Al) phases in the unstable growth zones are refined and uniformly distributed after being annealed at 1200 °C for 1 h. The fracture model of Fe(Al, Ta)/Fe2Ta(Al) eutectic composites changes from pure brittle fracture to quasi-cleavage fracture after homogenization annealing. Meanwhile, strength and toughness are also significantly improved. The friction property and corrosion resistance have also been improved. This provides fundamental insights and technical support for solving the room temperature brittleness of Fe-Al intermetallic compounds, which can facilitate and promote the research and development of new high-temperature structural materials.