WC spherical particles of x wt% (x=0,10,20,30) were added into CrFeNiBSi medium entropy alloy (MEA) prepared by the laser direct energy deposition. The effects of WC content on the microstructure, the mechanical properties and the friction and wear properties of CrFeNiBSi/ WC composites were systematically discussed. Results indicate that most of the WC particles are not completely dissolved and evenly dispersed in the CrFeNiBSi/WC composite matrix, while the dissolved W and C elements diffuse into the matrix and form a eutectic structure containing carbides. With the increase of WC content, the hardness of CrFeNiBSi/WC increase correspondingly. At the same time, compared with CrFeNiBSi, CrFeNiBSi/WC has better wear resistance and higher yield strength. In particular, the wear resistance of CrFeNiBSi with 30 wt%WC is increased by 4.1 times and the yield strength is increased by more than 1.6 times. It proves that the yield strength and wear resistance of laser deposited CrFeNiBSi MEA can be improved by adding WC.

中文翻译：

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直接能量沉积WC颗粒增强CrFeNiB0.03Si0.03中熵合金组织演变与力学性能对比研究


在激光直接能量沉积法制备的CrFeNiBSi中熵合金(MEA)中添加xwt%(x=0、10、20、30)的WC球形颗粒。系统讨论了WC含量对CrFeNiBSi/WC复合材料显微组织、力学性能和摩擦磨损性能的影响。结果表明，大部分WC颗粒并未完全溶解并均匀分散在CrFeNiBSi/WC复合基体中，而溶解的W和C元素扩散到基体中并形成含有碳化物的共晶组织。随着WC含量的增加，CrFeNiBSi/WC的硬度也相应增加。同时，与CrFeNiBSi相比，CrFeNiBSi/WC具有更好的耐磨性和更高的屈服强度。特别是添加30wt%WC的CrFeNiBSi耐磨性提高4.1倍，屈服强度提高1.6倍以上。证明添加WC可以提高激光沉积CrFeNiBSi MEA的屈服强度和耐磨性。