Author： Ravindranathan S. Kashyap K. Kumar S. Ramachandra C. Chatterji B.
Publisher： Springer Publishing Company
ISSN： 1059-9495
Source： Journal of Materials Engineering and Performance, Vol.9, Iss.1, 2000-02, pp. : 24-27
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Abstract
The effect of delayed aging on mechanical properties is characteristically found in Al-Mg-Si alloys. “Delayed aging” refers to the time elapsed between solutionizing and artificial aging. Delayed aging leads to inferior properties. This effect was investigated in an Al-Cu-Mg alloy (AU2GN) of nominal composition Al-2Cu-1.5Mg-1Fe-1Ni as a function of delay. This alloy also showed a drop in mechanical properties with delay. The results are explained on the basis of Pashley’s kinetic model to qualitatively explain the evolution of a coarse precipitate structure with delay. It is found that all the results of delayed aging in the Al-Cu-Mg alloys are similar to those found in Al-Mg-Si alloys.
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