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| The internal friction peak correlated to the relaxation of Al antisite atoms in Fe-Al alloys |
| SUN Wei |
| Zhejiang Industry and Trade Polytechnic College; Wenzhou 325003 |
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Cite this article:
SUN Wei. The internal friction peak correlated to the relaxation of Al antisite atoms in Fe-Al alloys. Acta Metall Sin, 2007, 43(3): 311-314 .
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Abstract 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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Received: 14 July 2006
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