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<p>High-entropy alloy and its composite material show good development prospects and extensive application potential in the aerospace field. One of the most promising developments in additive manufacturing in the 20th century is laser melting deposition manufacturing, as it is commonly acknowledged. In this paper, the effects of TiC ceramic particles on the microstructure, mechanical properties and friction and wear properties of high-entropy alloy is thoroughly investigated. According to the results, the yield strength and tensile strength of the high-entropy alloy at room temperature are 203 and 542&#xa0;MPa, respectively, and it has a single-phase FCC solid solution crystal structure with a clearly oriented coarse columnar crystal structure. When combined with TiC ceramic particles, it displays a composite structure comprising a single-phase FCC solid solution crystal structure and TiC, which is mainly composed of columnar dendrites with some cellular dendrites, and a little amount of unmelted TiC particles. The yield strength of the room temperature tensile test is increased to 231&#xa0;MPa (13.8% improvement over the TiC-free sample), while the tensile strength rises to 608&#xa0;MPa (12.2% improvement over the TiC-free sample). The detailed analysis shows that the increase in yield strength is a result of the combined effects of fine-grain strengthening and Orowan strengthening mechanisms. In addition, the high-entropy alloy composite material exhibits superior wear resistance compared to the high-entropy alloy material. The frictional wear mechanisms of both are dominated by abrasive and adhesive wear, accompanied by a small amount of oxidative wear. The study’s findings offer a crucial theoretical foundation for the creation of high-entropy composite materials through the use of laser melting deposition methods.</p>

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Effect of TiC Addition on the Microstructure and Mechanical Properties of Fe55Cr25Co10Ni10 High-Entropy Alloy by Laser Melting Deposition Manufacturing

  • 期刊论文

  • 发表日期：

    2025年1月28日

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  • Zijian Wang,
  • Fei Xing,
  • Xiangyu Liu,
  • Guojian Xu,
  • Weijun Liu,
  • Hongyou Bian

摘要

High-entropy alloy and its composite material show good development prospects and extensive application potential in the aerospace field. One of the most promising developments in additive manufacturing in the 20th century is laser melting deposition manufacturing, as it is commonly acknowledged. In this paper, the effects of TiC ceramic particles on the microstructure, mechanical properties and friction and wear properties of high-entropy alloy is thoroughly investigated. According to the results, the yield strength and tensile strength of the high-entropy alloy at room temperature are 203 and 542 MPa, respectively, and it has a single-phase FCC solid solution crystal structure with a clearly oriented coarse columnar crystal structure. When combined with TiC ceramic particles, it displays a composite structure comprising a single-phase FCC solid solution crystal structure and TiC, which is mainly composed of columnar dendrites with some cellular dendrites, and a little amount of unmelted TiC particles. The yield strength of the room temperature tensile test is increased to 231 MPa (13.8% improvement over the TiC-free sample), while the tensile strength rises to 608 MPa (12.2% improvement over the TiC-free sample). The detailed analysis shows that the increase in yield strength is a result of the combined effects of fine-grain strengthening and Orowan strengthening mechanisms. In addition, the high-entropy alloy composite material exhibits superior wear resistance compared to the high-entropy alloy material. The frictional wear mechanisms of both are dominated by abrasive and adhesive wear, accompanied by a small amount of oxidative wear. The study’s findings offer a crucial theoretical foundation for the creation of high-entropy composite materials through the use of laser melting deposition methods.