[en] The structural evolutions of the mechanically alloyed ternary Al₇₀Cu₂₀Fe₁₀ powders with the milling times and the annealing treatment were studied by X-ray diffraction (XRD) and X-ray absorption fine structure (XAFS). It was found that during the milling process, only Cu can incorporate into the lattice of Al to form an Al₂Cu compound or an AlCu solid solution, depending on the milling times. However, Fe remains the original structure of bcc α-Fe. Annealing treatment at 700 deg. C for 4 h can drive the α-Fe to react with the Al₂Cu compounds and AlCu solid solution, and the main products of the annealed Al₇₀Cu₂₀Fe₁₀ (10 h) and the annealed Al₇₀Cu₂₀Fe₁₀ (40 h) are the icosahedral Al₆₅Cu₂₀Fe₁₅ quasicrystal and the Al(Cu, Fe) solid solution, respectively. The local structural disorders around Fe and Cu atoms in the icosahedral QC phase is about 50% larger than those of the Al(Cu, Fe) solid solution