Synergistic Balance of Strength and Corrosion Resistance in Al-Mg-Er Alloys  

作　　者：Haifei Zhou Zhouhai Qian Mengcheng Zhou Xuebing Liu Yong Li Xinfang Zhang 

机构地区：[1]Zhejing Electric Power Corporation Research Institute,Hangzhou 310014,China [2]State Key Laboratory of Advanced Metallurgy,School of Metallurgical and Ecological Engineering,University of Science and Technology Beijing,Beijing 100083,China

出　　处：《Acta Metallurgica Sinica(English Letters)》2020年第5期659-670,共12页金属学报（英文版）

基　　金：financially supported by the National Natural Science Foundation of China(Nos.U1860206,51601011,51874023);the Fundamental Research Funds for the Central Universities(No.FRF-TP-18-003B1);the Recruitment Program of Global Experts,the State Grid Scientific and Technological Research Program of China(No.5211DS17001X)

摘　　要：High-strength,corrosion-resistant,and lightweight Al-Mg alloys perform an important function in harsh coastal service environments.Corrosion resistance is generally inversely correlated with strength;hence,it is difficult to simultaneously optimize both.In this study,a low-magnesium Er-containing Al-based alloy that is stronger and more corrosion resistant than Al-based alloys have been reported.The alloy contains Er,and the precipitation of Al3 Er within a face-centered cubic matrix is obtained by a series of smelting-casting,heat treatment,and rolling processes.It is presumed that the strengthening phase of Al3 Er pinning dislocations improves alloy strength.It also increases the recrystallization temperature of cold-rolled matrix and induces the distribution of small-angle grain boundaries,thus allowing the alloy to achieve excellent environmental corrosion resistance.As a result,strength and corrosion resistance are simultaneously improved.

关 键 词：Al-Mg alloy AL3ER STRENGTH Corrosion resistance Er 

分 类 号：TG146.21[一般工业技术—材料科学与工程]