An Investigation on the Aging of the Aluminium Alloy by Measuring the Damping Capacity (3rd. Report)

概要

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In the previous report, it was found by measuring the damping capacity, the specific volume, the lattice consant in X-ray analysis and others on the aging of 17S that the internal structure treaded very complicated change and gradually was near a stable state. The authors found in the experiment of aging of 2S, which was simple in chemical composition compared with 17S, that 2S showed a change similar to the aging and was an unstable state especially in early stage by the same experiment in spite of the 2S was apt to be looked upon as non-aging metal in the past. Now, we search the aging of Al-3.116% Cu alloy in the early stages by the same experimental method in order to find the influence of the added component on the aging, because this material was studied enough on the internal change in the aging by Mr. Hardy and others in the past and it is convenient to discuss the result for the above reason. And we pursue the aging by measuring the damping capacity in torsional oscillation to this time, but, in this paper, the damping capacity in cantilever type transverse oscillation of the plate specimens are measured and the results are compared with the ones by the former method in order to find whether these unstable changes are depend upon the measuring method and to confirm the reliability of the analysis by measuring the damping capacity.
山梨大学の論文
1961-12-20