Structure of melt-spun Al-2.M-2.5Fe-2.5V alloy and structural changes during annealing

Rapidly solidified Al-2.5Ti-2.5Fe-2.5V alloy was prepared by melt spinning. As-spun and as-annealed microstructures were studied by TEM, HREM, XRD and EDS analysis. The microhardness of the alloy at different annealing temperature was measured. The results show that the as-spun microstructure of the alloy includes four kinds of primary phases: Al-11 (V,Ti), AlTi3, Al-80 (V,Ti)(20) and Al-82 (Fe,Ti, V)(18) phase. After annealing at 300 degreesC for 10 h, metastable phase Al-82 (Fe,Ti,.V)(18) transforms to the stable phase Al13Fe4. After annealing at 400 degreesC for 10 h, the primary phases Al-11 (V, Ti) and AlTi3 has completely transformed to Al-80 (V, Ti)(20) and Al-23 Ti-9 phase, respectively. The addition of element V increases the microhardness of melt-spun Al-2. 5Ti-2. 5Fe alloy at elevated temperatures.