MICROSTRUCTURE OF A RAPIDLY SOLIDIFIED POWDER METALLURGY AI-Fe-V-Si ALLOY

The morphology,distribution,crystallography and microstructure of the precipitates in a dispersoid strengthened,powder metallurgy Al-8.5Fe-1.3V- 1. 7Si alloy were studied by X-ray and TEM,The results show that there is only one kind of precipitate, namely, Al_13(Fe,V)_3Si, with a l.256 nm of lat- tice parameter.There is a preferred orientation relationship for intergranular dispersoids to be recognized as follows {110}Al-matrix{110}silicide <111>Al-matrix<110>silicide Examinations by high resolution electro