Internal friction of Al alloys produced by mechanically alloying.
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概要
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Internal friction was measured of four mechanically alloyed aluminum alloys in a range of temperature from 300 to 700K at a frequency of about 1Hz. Peaks are observed at about 450K, at much lower temperature than that of pure aluminum produced by ingot metallurgy. The shift of the temperature is ascribed to the small grain size produced by mechanical alloying. The peak height of IN9052 (Al-4.0 mass%Mg) and IN9021 (Al-1.5 mass%Mg-4.0 mass%Cu) alloys, which exhibit superplasticity, is 6 to 10 times greater than that of the other alloys which fail to exhibit superplasticity. This fact is explained by the difference in the mobility of grain boundary among these alloys. Based on these facts, the conclusion has been drawn that the internal friction ascribable to grain boundary sliding can be a good measure to find structures feasible to superplasticity.
- 一般社団法人 軽金属学会の論文
一般社団法人 軽金属学会 | 論文
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