文章基本信息

标题：Microstructure evolution of Al-5wt. %Cu based alloy under compound Strengthening
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作者：Min Li ; Lanrong Cai ; Shijie Liu 等
期刊名称：IOP Conference Series: Earth and Environmental Science
印刷版ISSN：1755-1307
电子版ISSN：1755-1315
出版年度：2019
卷号：252
期号：2
页码：1-6
DOI：10.1088/1755-1315/252/2/022122
出版社：IOP Publishing
摘要：The effects of yttrium(Y) additions (0, 0.05, and 0.1wt. %) and partial remelting treatment on microstructure, grain size, phase composition of Al-5wt. %Cu based alloy were investigated in the present work. The microstructure and phase composition of samples were examined by optical microscopy (OM), scanning electron microscopy (SEM), and transmission electron microscope (TEM). We demonstrate that the AlCuY phase which had hexagonal lattice structure was precipitated by adding Y. Especially, Y+ returns refines the grain size, decreases the quantity of eutectic on grain boundaries, and narrows the crystallization range. Quantitative metallography shows that the grain size is reduced to about 25μm for alloys with 0.1 wt. %Y+20wt. %R.