Effect of Yb addition on precipitation and microstructure of Al-Cu-Mg-Ag alloys

摘要：

Al-Cu-Mg-Ag alloys with different Yb contents were prepared by ingot metallurgy and thermomechanical treatment. The effect of Yb addition on the precipitation and microstructure of the alloys was investigated using mechanical properties testing,optical microscopy,differential scanning calorimetry(DSC),scanning electron microscopy(SEM) and transmission electron microscopy(TEM). The results show that adding 0.10％.0.35％ Yb accelerates the aging hardening process,increases the maximum hardness and the tensile strength of the extruded alloys from room temperature to 300 ℃ Trace Yb element addition refines the grains of the casting alloys from 85 μm to 30 μm,decreases the precipitation temperature of Ωphase. Moreover,the addition of Yb into Al-Cu-Mg-Ag alloy decreases the precipitates size,and improves the density and the thermal stability of phase between 200℃ and 300℃

关键词： aluminum alloy Yb addition precipitation microstructure mechanical properties

作者: XIAO Dai-hong HUANG Bai-yun

作者单位: State Key Laboratory of Powder Metallurgy,Central South University,Changsha 410083,China;Laboratory Laboratory of Material Physics,Zhengzhou University,Zhengzhou 450052,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）