期刊
RARE METALS
卷 28, 期 1, 页码 102-106出版社
NONFERROUS METALS SOC CHINA
DOI: 10.1007/s12598-009-0020-8
关键词
aluminum alloy; scandium; ingot metallurgy; microstructure; mechanical properties
资金
- National High-Tech Research and Development Program of China [2006AA03Z523]
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 degrees C for 40 min and then aged at 120 degrees C for 24 h. The addition of minor Sc induces the formation of Al(3)(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 Al(3)(Sc,Zr) particles, and substructure strengthening.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据