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Abstract
The authors repoted previously that the specific volume analysis could be applied to the industrial method for analysing the aging mechanism in aluminium alloys. In this paper, details of the experimental study are reported as a continuation of previous report, on the aging of three sorts of Al-Cu alloy, i. e. 3.116% Cu, 4.240% Cu and 6.200 Cu, the internal change of which was investigated well by H. K. Hardy and others, by means of specific volume analysis.The experiments are pursued just like those in the previous report, that is, after being kept at 500-520°C for 30 minutes, the specimens are quenched in water and recieve the temperd aging for a long time at the prescribed temperature, and then the change of specific volume is pursued. And further the specific volume analyses are applied on the aging at raised temperature of the quenched specimens and the aging (at 20°C) of the rehardened specimens which are quenched into water from 200°C.We appreciate that this research has been done at the expence of the Grant-in-aid of the Scholarship from the Institute of Light Metal Foundation.
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