Microstructure and mechanical properties of Al-Cu-Mg-Ag alloyed with Ce

摘要：

The aged characteristics and microstructure of two Al-Cu-Mg-Ag alloys with and without Ce addition are investigated by TEM and mechanical properties test.The results show that trace Ce addition inhibits precipitating process and delays peak aging time.0.25％ Ce additions decrease both tensile strength and ductility.TEM observation shows that the morphology of precipitate can be modified by the small addition of Ce.The trace Ce affects the microstructure by reducing the volume fraction of precipitate.It can be concluded that the intensive interaction between Ce and Cu decreases the Cu atom concentration in alloy matrix and reduces the precipitated kinetics for Ωphase.

关键词： aluminum alloy aging behavior microstructure Ce addition precipitating kinetics

作者: LI Yun-tao LIU Zhi-yi ZHOU Jie XIA Qing-kun

作者单位: School of Materials Science and Engineering,Central South University,Changsha 410083,China

会议类型: 国际会议

会议名称: 2007年国际有色金属大会(International Conference of Nonfereous Materials 2007)(ICNFM)

会议地点: 长沙

会议语种:英文

在线出版日期: 2007-11-28（万方平台首次上网日期，不代表论文的发表时间）