%0 Journal Article
%T Influence of Li on the ageing characteristics and microstructure of Al--Cu--Mg--Ag alloy with low Cu/Mg ratio<br>锂对低Cu/Mg比Al-Cu-Mg-Ag合金时效特性的影响
%A CHEN Zhiguo ZHENG Ziqiao
%A <br>陈志国
%A 郑子樵
%A 王芝秀
%A 李世晨
%J 材料研究学报
%D 2004
%I 
%X 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.
%K metallic materials
%K Al alloy
%K ageing
%K microstructure
%K lithium<br>金属材料
%K 铝合金
%K 时效
%K 微观结构
%K 锂
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=5B3AB970F71A803DEACDC0559115BFCF0A068CD97DD29835&cid=84529CA2B2E519AC&jid=C101C4C04993B4D94FCD8446E6CBEB3B&aid=C4509C55829E534B&yid=D0E58B75BFD8E51C&vid=13553B2D12F347E8&iid=94C357A881DFC066&sid=5A751AE9FA58A3FB&eid=C81D738643975BB0&journal_id=1005-3093&journal_name=材料研究学报&referenced_num=0&reference_num=23