Effects of minor Sc on the microstructure and mechanical properties of Al-Zn-Mg-Cu-Zr based alloys

查看全文 作　　者：LI [1,2]Wenbin;PAN [1]Qinglin;ZOU [1]Liang;LIANG [1]Wenjie;HE [1]Yunbin;LIU [1]Junsheng

机构地区：[1]School of Materials Science and Engineering, Central South University, Changsha 410083, China;[2]Department of Civil Engineering, Hunan City University, Yiyang 413000, China

出　　处：《Rare Metals》索引2009年第28卷第1期,共5页

基　　金：supported by the National High-Tech Research and Development Program of China (No. 2006AA03Z523) 摘　　要：Five kinds of Al-Zn-Mg-Cu-Zr based alloys with different Sc additions were prepared by ingot metallurgy. The effects of minor Sc on the microstructure and mechanical properties of Al-Zn-Mg-Cu-Zr based alloys were investigated using tensile tests, optical microscopy (OM), and transmission electron microscopy (TEM). The results show that the ultimate tensile strength and yield strength are improved by 94 and 110 MPa, respectively, and the elongation to failure remains at a reasonable extent (11.1%) in the Al-Zn-Mg-Cu-Zr based alloy with 0.21 wt.% Sc addition after solution heat treatment at 475°C for 40 min and then aged at 120°C for 24 h. The addition of minor Sc induces the formation of Al3(Sc,Zr) particles, which are highly effective in refining the cast microstructures, retarding recrystallization, and pinning dislocations. The increment of strength is attributed mainly to fine grain strengthening, precipitation strengthening of Al3(Sc,Zr) particles, and substructure strengthening. 关键词：铝合金钪钢锭冶金微观结构机械性质

相关文献

参考文献（15）
引证文献（15）
耦合文献（28）

参考文献(15)

引证文献(15)

耦合文献(28)

互联网出版许可证新出网证(渝)字10号全国400电话 - 免长途话费

Effects of minor Sc on the microstructure and mechanical properties of Al-Zn-Mg-Cu-Zr based alloys

参考文献(15)

引证文献(15)

耦合文献(28)

用户提示