铈对Al-Cu-Mg-Mn-Ag合金时效析出与显微组织的影响

来源期刊：中国有色金属学报2007年第5期

论文作者：肖代红 陈康华 宋旼

文章页码：669 - 669

关键词：铝合金；铈；时效析出；显微组织

Key words：aluminum alloy; cerium; precipitation; microstructure

摘    要：

Abstract: Al-Cu-Mg-Mn-Ag alloys with different cerium contents were prepared by ingot metallurgy and thermomechanical treatment. The effect of cerium addition on the precipitation and microstructure of alloys was investigated by optical microscopy, differential scanning calorimetry, scanning electron microscopy and transmission electron microscopy. The results show that the cerium addition refines the grains of casting alloys and the average grain size decreases from 93 μm to 30 μm. Trace element cerium addition accelerates the aging hardening process of extruded alloys, increases the maximum hardness of alloys by about 10%, and decreases the precipitation temperature of Ω phase. Moreover, the addition of Ce into Al-Cu-Mg-Mn-Ag alloy decreases the size of Ω phase, and improves the density and thermal stability of Ω phase between 200 ℃ and 300 ℃.

基金信息：国家重点基础研究发展计划资助项目