Author:
Fang X.,Song M.,Li K.,Du Y.
Abstract
Heat treatable Al-Mg-Si alloys can be strengthened via the precipitation of
metastable phase particles. The precipitation sequence of an Al-0.89Mg-0.75Si
alloy with trace Fe and Zn elements during aging at 180 ?C has been
investigated by transmission electron microscope (TEM), high resolution
transmission electron microscope (HRTEM) and hardness measurements. It has
been shown that the precipitation sequence of the alloy can be identified as
follows: supersaturated solid solution ? G.P. zones ? metastable ??
precipitates ? metastable ?? precipitates ? stable ? phase + Si particles. It
is indicated that ?? phase remains stable up to 30 hours at 180?C. The
hardness measurements during aging realize that the main strengthening phase
for the investigated Al-Mg-Si alloy is ?? precipitates and the maximum
hardness is obtained after aging at 180 ?C for 4~6.5 hours.
Publisher
National Library of Serbia
Subject
Materials Chemistry,Metals and Alloys,Mechanics of Materials,Geotechnical Engineering and Engineering Geology
Cited by
57 articles.
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