利用内耗方法对Fe-Al合金中Al反位置原子的运动特征进行了研究。在410℃附近观察到了一个与合金热历史相关的弛豫型内耗峰，在快冷样品中内耗峰高度明显高于慢冷样品，而对于快冷样品，升温测量时内耗峰高度又明显高于随后的降温测量，这表明该内耗峰与快冷时残留的缺陷有关。由于该内耗峰激活能为1.88eV，与B2 Fe-Al合金中Fe空位的迁移能相当，因此该峰应产生于应力诱导下Al反位置原子在Fe空位之间的运动。
Internal friction behavior of Fe-Al alloys was examined to understand the motion of Al antisite atoms. A relaxational internal friction peak was observed at about 410℃ that was dependent on the thermal histories of the alloy. The peak height is much higher in the rapidly cooled specimens than in the slowly cooled ones, and similarly, it is much higher in heating than in subsequent cooling for the rapidly cooled specimens. It is therefore suggested that the peak should be related to retained defects due to rapid cooling. In terms of the activation energy of the peak, that is 1.88eV, comparable to the migration energy of the Fe vacancy, it is proposed that the peak originates from the stress-induced movement of Al antisite atoms between Fe vacancies.
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