Effects of solution treatment temperatures and time on the microstructure and mechanical properties of Al-5Fe alloy were investigated.The experimental results reveal that more undissolved second phase is remained in the alloy with a lower solution temperature

resulting in the low concentration of solid solution strengthening phase

the poor strengthening effect and the low performance of the aged alloy

while with a higher solution temperature

serious over-burning and oxidation of grain boundary which deteriorates the alloy’s mechanical properties occurs in the alloy.With a short solution time

as a result of the less dissolution of strengthening phase

mechanical properties of the Al-Fe alloy are decreased

while with long solution time

grain is grown with the in crease of size

resulting in the coarseness of grain boundary and the decrease of mechanical properties of the alloy.