Effect of Addition Zr on As-homogenization Microstructures of 5182 Aluminum Alloy

摘要：

　　The microstructure of 5182 alloys,standard and modified by Zr,before/after homogenizing heat treatment were investigated by optical microscope(OM),scanning electron microscope(SEM) with energy dispersive spectroscopy(EDS) and transmission electron microscope(TEM).The microstructures on optimum condition for homogenizing heat treatment and the effect of Zr were discussed.It is found that the intermetallic compounds formed on the grain boundaries are less in Zr modified 5182 than 5182 alloys for the as-cast structure.After the two alloys homogenized at 475℃ for 24h,the dendritic structure disappear and intermetallic compounds become discontinuous,Al2Mg3 phases are decomposed,and there are some precipitates of Al6(Mn,Fe) and Al6Mn in the grain interior.In addition,precipitates of Al3Zr distributed in the matrix of Zr modified 5182 alloys.

关键词： Homogenization Microstructure Zr modified 5182 Dendritic structure

作者: Binhui Jin Baohong Zhu Baohong Zhu

作者单位: State Key Laboratory of Nonferrous Metals and Processes,General Research Institute for Nonferrous Metals, Beijing 10088, China

会议类型: 国际会议

会议名称: the Chinese Materials Congress 2012(2012年中国材料大会(CMC2012))

会议地点: 太原

会议语种:英文

页码: 47-53

在线出版日期: 2012-07-13（万方平台首次上网日期，不代表论文的发表时间）