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早在1955年,Friedel等人曾提出一个多边化间界内耗的理论模型。该模型预言,应该存在与多边化间界有关的内耗峰,尽管Friedel等人未观察到这个内耗峰。现在,这个与多边化间界有关的内耗峰已在高纯铝及稀铝铜合金中被观察到。它出现在较高的温度及较低的频率,有很高的内耗,用高纯铝测得的激活能是35×4.1868kJ/mol,与纯铝的自扩散能相同。然而,在Friedel等人的模型中有一个基本假设被Nowick和Berry提出疑问,即在高温下
As early as 1955, Friedel et al. Proposed a theoretical model of multilateral internal friction. This model predicts that there should be a frictional internal friction peak related to the multilateral boundary, although Friedel et al. Did not observe this internal friction peak. Now, the internal friction peak associated with the multilateral boundary has been observed in high-purity aluminum and rare-earth copper alloys. It appears at higher temperatures and lower frequencies with high internal friction. The activation energy measured with high-purity aluminum is 35 × 4.1868 kJ / mol, which is the same as that of pure aluminum. However, there is a basic assumption in Friedel et al’s model that is questionable by Nowick and Berry, that at high temperatures