Effect of Y content on microstructure and mechanical properties of 2519 aluminum alloy

摘要：

The effects of yttrium(Y) content on precipitation hardening,elevated temperature mechanical properties and morphologies of 2519 aluminum alloy were investigated by means of microhardness test,tensile test,optical microscopy(OM),transmission electron microscopy(TEM) and scanning electron microscopy(SEM).The results show that the tensile strength increases from 485 MPa to 490 MPa by increasing Y content from 0 to 0.10％(mass fraction) at room temperature,and from 155 MPa to 205 MPa by increasing Y content from 0 to 0.20％ at 300 ℃.The high strength of 2519 aluminum alloy is attributed to the high density of fine θ′ precipitates and intermetallic compound AlCuY with high thermal stability.Addition of Y above 0.20％ in 2519 aluminum alloy may induce the decrease in the tensile strength both at room temperature (20 ℃) and 300 ℃.

关键词： 2519 aluminum alloy yttrium microstructure mechanical properties

作者: LI Hui-zhong LIANG Xiao-peng LI Fang-fang GUO Fei-fei LI Zhou ZHANG Xin-ming

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）