Effect of Nd and Y addition on microstructure and mechanical properties of extruded Mg-Zn-Zr alloy

被引：6

作者：

Li, Qiang ^{[1
]}

Wang, Qudong ^{[1
]}

Li, Daquan ^{[1
]}

Ding, Wenjiang ^{[1
]}

机构：

[1] Shanghai Jiao Tong Univ, Sch Mat Sci & Engn, Natl Engn Res Ctr Light Alloys Net Forming, Shanghai 200030, Peoples R China

来源：

2006 BIMW: 2006 BEIJING INTERNATIONAL MATERIALS WEEK, PTS 1-4: MAGNESIUM | 2007年 / 546-549卷

关键词：

Mg-Zn-Nd-Y-Zr alloy; extrusion; strength; T phase; W phase;

D O I：

10.4028/www.scientific.net/MSF.546-549.413

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The effect of Nd and Y addition on the microstructure and mechanical properties of as-extruded Mg-Zn-Zr magnesium alloy has been investigated in this study. The Mg-Zn-Zr alloy had 11 mu m average grain size due to dynamic recrystallization during hot extrusion; but the average grain sizes of the Mg-Zn-Nd-Y-Zr alloys were markedly reduced to 4 mu m by Nd and Y additions. The lamellar alpha-Mg + T phase or alpha-Mg + W phase eutectics at grain boundaries in as-cast Mg-Zn-Nd-Y-Zr alloys were broken up and MgZn2 precipitates in the matrix are obtained during hot extrusions. The mechanical properties of as-extruded Mg-Zn-Zr alloy were improved significantly by Nd and Y additions, especially the elevated temperature strength, which was above 150 MPa in ultimate tensile strength at 250 degrees C. These may be ascribed to the very fine grain size, the dispersed T phase or W phase and the MgZn2 type Laves phase precipitating during hot extrusion.

引用

页码：413 / +

页数：2

共 9 条

[1] Application of quasicrystalline particles as a strengthening phase in Mg-Zn-Y alloys [J].