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| Influence of Li on the ageing characteristics and microstructure of Al--Cu--Mg--Ag alloy with low Cu/Mg ratio |
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| 中南大学 |
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Cite this article:
;. Influence of Li on the ageing characteristics and microstructure of Al--Cu--Mg--Ag alloy with low Cu/Mg ratio. Chin J Mater Res, 2004, 18(5): 517-523.
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Abstract The influence of lithium on the ageing behavior and
microstructure of the low Cu/Mg ratio Al--Cu--Mg--Ag alloys was
investigated. The results show that the effect of Li is to
increase the rate of hardening, however, the addition of lithium
does not progressively change age hardening and precipitation
process of Al--Cu--Mg--Ag alloys with low Cu/Mg ratio, and significant age
hardening response only occurs with the addition of 2.0\%Li (mass
fraction). Transmission electron microscope (TEM) investigation
results show that the remarkable increase of age hardness and
strength is attributed to the fine dispersion of $\delta^{\prime}$,
$Z$ phase and spherical $\delta^{\prime}$/$\beta^{\prime}$ compound particles
in the 2.0\%Li--containing alloy.
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Received: 05 November 2004
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