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