Zeqin Liang, Cynthia Sing Ting Chang
The effect of Fe, Mn, and other trace elements on the ageing response of Al-Mg-Si alloy has been investigated through an experimental approach. This study utilized three alloys: an Al-0.4wt%-1.0wt%Si alloy with very low impurities, another Al-0.4wt%-1.0wt%Si alloy containing 0.25wt%Fe and 0.08%Mn, and a commercial 6016 alloy containing additional elements. The samples underwent solution heat treatment followed by quenching in various media, subsequently being artificially aged. The ageing responses were assessed using microhardness measurements, while Differential Scanning Calorimetry (DSC) was employed to examine precipitation behavior. Furthermore, the morphologies of the precipitates and intermetallic compounds were characterized using Transmission Electron Microscopy (TEM) and Scanning Electron Microscopy (SEM). The results demonstrated that, under paint bake conditions, the 6016 alloy exhibited the highest number density of β”, correlating with its rapid ageing response, whereas the alloy containing Fe and Mn showed the slowest. The study found that the presence of Fe and Mn reduces the Si content essential for β” formation during ageing, while trace elements tend to promote β” formation and enhance the hardening rate despite the presence of intermetallic compounds.
@article{443fd4f3-104d-4b32-bee8-0a5a0e6e839f,
title={The Effect of Fe, Mn and Trace Elements on Precipitation in Al-Mg-Si Alloy},
author={Zeqin Liang and Cynthia Sing Ting Chang},
year={2010},
language={en}
}TY - JOUR TI - The Effect of Fe, Mn and Trace Elements on Precipitation in Al-Mg-Si Alloy AU - Zeqin Liang AU - Cynthia Sing Ting Chang PY - 2010 LA - en ER -
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