Thermal stability of multi-pray deposition heat resistant Al-Fe-V-Si alloy

摘要

Rapidly solidified Al 8.4Fe 1.3V 1.7Si heat resistant alloy was made by using multi layer spray deposition technique. Its thermal stability of mechanical properties was investigated by the means of tensile and hardness tests, thermal stability of microstructure by transmission electron microscopy (TEM), X ray diffraction (XRD). The results show that after heat exposure (HE) at 753?K for 500?h the tensile strength and hardness of Al Fe V Si alloy at 623?K maintains the same values as those at room temperature. HE dose not obviously affect the thermal stabilities of Al 12 (Fe,V) 3Si phase but the lattice constant of Al 12 (Fe,V) 3Si phase decrease.