The aluminum alloy quasicrystal phase was prepared in the high aluminum

low manganese and low Ti alloy by vacuum induction melting and water-cooled copper mold. Effects of alloy composition

especially Ti content

on the microstructure and phase composition in the alloy were investigated by optical microscope （OM）

X-ray diffraction

scanning electron microscope（SEM） and EDS （energy dispersive spectrometer）. The results show that the prepared Al-Mn alloy is composed of decagonal quasicrystal T phase and its similar crystal phase （Al4Mn）. Ti addition can refine quasicrystal T phase grains and inhibit the formation of similar crystal phase. With Ti element more than 3% in atom percentage

some petal-like microstructure is observed in the alloy

which is identified as Al67Mn13Ti20 quasicrystal phase by X-ray diffraction and EDS analysis.