(东南大学 材料系， 南京 210096)
摘 要: 采用反应铸造法制备了含VC、TiC颗粒的Fe3Al基合金，并研究了颗粒相的加入对Fe3Al合金组织结构和力学性能的影响。研究表明，TiCp可以细化Fe3Al合金铸锭组织，而VCp的作用不明显，但可以细化热加工后的再结晶组织；同时发现，颗粒相的加入提高了Fe3Al合金在室温和600℃下的屈服强度，而延伸率有稍许下降，并改变了合金的断裂模式。
关键字: Fe3Al； VC； TiC； 力学性能； 显微组织； 断裂模式
of Fe3Al-based alloys
（Department of Materials Science and Engineering,
Southeast University, Nanjing 210096, P.R.China）
Abstract:Fe3Al-based alloys containing 1.0%～1.5% VC (mole fraction) and TiC particles were fabricated by melting and casting processes, and the effects of VC and TiC particles on microstructure and mechanical properties of the alloys were investigated. It was indicated that the formation of TiC particles results in the refinement of the microstructure of the ingots while the formation of VC particles has no this effect, however, can refine the microstructure after recrystallization. Meanwhile, addition of VC and TiC particles improves the yield strength at room temperature and decrease the ductility of the alloys slightly. The SEM observations showed that the formation of the particles affects the fracture mode of the alloys.
Key words: Fe3Al; VC； TiC; microstructure; mechanical properties; fracture mode
