Zhao Yubo, Ma Wenbo, Tisov Oleksandr
School of Aerospace Engineering, Xi'an Jiaotong University, West Xianning Road 28, Xi'an 710049, China.
Materials (Basel). 2025 Jan 18;18(2):442. doi: 10.3390/ma18020442.
The aim of this paper is to investigate the effect of TiC addition on the microstructure, microhardness, and wear resistance of the medium-entropy alloy Co37Cr28Ni31Al2Ti2, which is suitable for applications in aerospace, automotive, and energy industries due to its high strength and wear resistance. The samples containing 0, 10, 20, and 40 wt.% of TiC were synthesized. The alloy's microstructure changes significantly with the addition of TiC particles: they are uniformly dispersed in the FCC matrix, effectively increasing the Vickers hardness from 439 HV for the base alloy to 615 HV for the 40% TiC alloy. The four alloys were subjected to reciprocating dry sliding friction tests at loads of 2 N, 5 N, and 10 N. The wear volumes of the base alloy at these loads were 2.7 × 10, 4.6 × 10, and 1.1 × 10 μm, respectively. The experimental results indicate that adding TiC greatly improves the wear resistance of the alloy by increasing the hardness and forming an oxide protective film. This study highlights the potential for developing alloys with excellent tribological properties for demanding application scenarios.
本文的目的是研究添加TiC对中熵合金Co37Cr28Ni31Al2Ti2的微观结构、显微硬度和耐磨性的影响。由于其高强度和耐磨性，该合金适用于航空航天、汽车和能源行业。合成了含有0、10、20和40 wt.% TiC的样品。随着TiC颗粒的添加，合金的微观结构发生了显著变化：它们均匀地分散在面心立方（FCC）基体中，有效地将维氏硬度从基础合金的439 HV提高到40% TiC合金的615 HV。对这四种合金在2 N、5 N和10 N的载荷下进行了往复干式滑动摩擦试验。在这些载荷下，基础合金的磨损体积分别为2.7×10、4.6×10和1.1×10μm。实验结果表明，添加TiC通过提高硬度和形成氧化保护膜，极大地提高了合金的耐磨性。本研究突出了开发具有优异摩擦学性能的合金以满足苛刻应用场景的潜力。
