Aging of a commercial Al-Cu-Si based alloy modified with germanium
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The effect of small addition (0,7 wt.%) of Ge on precipitation during aging at 190degreesC of a modified commercial Al-Cu-Si based alloy has been studied. It was found that the maximum hardness in the alloy containing Ge was achieved three times faster than in the alloy without Ge. TEM results clearly demonstrate that the accelerated precipitation should be ascribed to a dense and fine distribution of Si-Ge particles serving as sites for heterogeneous precipitation of theta and theta phases. Accelerated precipitation during aging was accompanied by increase in hardness.
Кључне речи:aging kinetics / Al-Si-Ge-Cu / heterogeneous precipitation / Si-Ge particles
Извор:Materials Science Forum, 2004, 453-454, 323-328
- Progress in Advanced Materials and Processes, 5th Conference of the Yugoslav-Materials-Research-Society (Yu-MRS 2003), Sep 15-19, 2003, Herceg Novi, Yugoslavia
ISSN: 0255-5476 (print)