As-cast microstructure of Al-Zn-Mg-Cu-Zr alloy containing trace amount of Sc

作     者：Yu Wang Bai-Qing Xiong Zhi-Hui Li Shu-Hui Huang Kai Wen Xi-Wu Li Yong-An Zhang 

作者机构：State Key Laboratory of Nonferrous Metals and ProcessesGeneral Research Institute for Nonferrous Metals 

出 版 物：《Rare Metals》 (稀有金属（英文版）)

年 卷 期：2019年第38卷第4期

页      面：343-349页

核心收录：

学科分类：0806[工学-冶金工程] 08[工学] 

基　　金：financially supported by the National Key Research and Development Program of China (No. 2016YFB0300903) 

主　　题：Scandium Aluminum alloy As-cast Microstructure Nucleant 

摘      要：It has been reported that the element scandium (Sc) is the most effective modificator which can significantly refine the grain size,prohibit recrystallization process and increase the *** trace of Sc in 7000 series aluminum alloys is considered to be an effective way to modify its microstructure and promote mechanical *** order to study the effect of Sc element on ascast microstructure of Al-Zn-Mg-Cu-Zr alloy,ingots containing different amounts of Sc were prepared by ferrous-mold *** were characterized by means of differential scanning calorimeter (DSC),X-ray diffraction (XRD),optical microscope (OM) and scanning electrical microscope (SEM).The results indicate that when the Sc level exceeds a critical concentration,A13(Sc,Zr) primary phase would form in the melt and act as an efficient nucleant,resulting in very refined grain and an equiaxed grain *** element reduces the number of eutectic phases formed during solidification,coupled with an increase in the concentration of major alloying elements retained in the *** behavior suggests possible benefits in improving the integrated properties of terminal products.