Xia Tian, Wang Rui, Bi Zhongnan, Wang Rui, Zhang Peng, Sun Guangbao, Zhang Ji
High-Temperature Materials Department, Central Iron & Steel Research Institute, Beijing 100081, China.
Materials (Basel). 2021 Aug 24;14(17):4792. doi: 10.3390/ma14174792.
Selective laser melting was used to prepare the ceramic particles reinforced nickel alloy owing to its high designability, high working flexibility and high efficiency. In this paper, a carbides particles reinforced Haynes 230 alloy was prepared using SLM technology to further strengthen the alloy. Microstructures of the carbide particles reinforced Haynes 230 alloy were investigated using electron microscopy (SEM), electron probe microanalysis (EPMA) and transmission electron microscopy (TEM). Meanwhile, the tensile tests were carried out to determine the strengths of the composite. The results show that the microstructure of the composite consisted of uniformly distributed MC and MC type carbides and the strengths of the alloy were higher than the matrix alloy Haynes 230. The increased strengths of the carbide reinforced Haynes 230 alloy (room temperature yield strength 113 MPa increased, ~ 33.2%) can be attributed to the synergy strengthening including refined grain strengthening, Orowan strengthening and dislocation strengthening.
由于选择性激光熔化具有高设计性、高加工灵活性和高效率，因此被用于制备陶瓷颗粒增强镍合金。本文采用选择性激光熔化技术制备了碳化物颗粒增强的Haynes 230合金，以进一步强化该合金。利用扫描电子显微镜（SEM）、电子探针微分析（EPMA）和透射电子显微镜（TEM）对碳化物颗粒增强Haynes 230合金的微观结构进行了研究。同时，进行拉伸试验以测定复合材料的强度。结果表明，复合材料的微观结构由均匀分布的MC和MC型碳化物组成，且合金的强度高于基体合金Haynes 230。碳化物增强Haynes 230合金强度的提高（室温屈服强度提高了113 MPa，约33.2%）可归因于细晶强化、奥罗万强化和位错强化等协同强化作用。
