Effect of Yttrium on Microstructures and Properties at Elevated Temperature of Mg-0.8Zr-0.35Zn Alloys

被引：2

作者：

梁维中

宁志良

王海波

刘洪德

刘洪汇

机构：

[1] School of Metal Materials

[2] Harbin University of Science and Technology

[3] Harbin

[4] China

[5] Harbin Dongan Autoengine Joint-Stock Co Ltd

来源：

JournalofRareEarths | 2004年 / 02期

关键词：

metal materials; microstructures; elevated temperature properties; rare earth metal;

D O I：

暂无

中图分类号：

TG13 [合金学与各种性质合金];

学科分类号：

080502 ;

摘要：

The effects of Y addition on microstructures and properties of as-cast and solid solutioning and aging treated Mg-0.8Zr-0.35Zn alloys at elevated temperature （250 ℃） were investigated by the use of XJG-04 optical microscopy, JCXA-733 electron probe, D/max-rB X-ray diffractometer （XRD） and WDW-200 electronic universal material testing machine. The results show that the microstructures of as-cast and heat treated Mg-0.8Zr-0.35Zn alloys with Y addition are refined and a new phase, Mg24Y5, is formed. At 250 ℃, the strength at elevated temperature of the alloys increases with increasing amount of Y addition, but relative elongation and area reduction decreases. The tendency of brittle fracture of fractured surface at elevated temperature is enlarged and fracture is changed from ductile into cleavage.

引用

页码：268 / 271

页数：4