The microstructure and mechanical properties of permanent-mould cast Mg-5 wt%Sn-(0-2.6) wt%Di alloys

被引：73
|
作者：
Liu, Hongmei
Chen, Yungui [1 ]
Tang, Yongbai
Huang, Deming
Niu, Gao
机构：
[1] Sichuan Univ, Sch Mat Sci & Engn, Chengdu 610065, Peoples R China
[2] Taiyuan Univ Technol, Taiyuan 030024, Shanxi, Peoples R China
来源：
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING | 2006年 / 437卷 / 02期
关键词：
magnesium alloys; tin; neodymium; praseodymium; rare earth elements;
D O I：
10.1016/j.msea.2006.07.149
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
The didymium (neodymium-praseodymium mixed metal, neodymium:praseodymium = 3:1) addition to the Mg-5 wt%Sn alloy results in the formation of a feather-shaped Sn-x(Nd,Pr)(y), phase mainly on the grain boundaries, and gives rise to grain refinement when the addition is below 2 wt%. The tensile strength and elongation of the alloys are improved with the addition of didymium, and optimum mechanical results are attained at an addition of 2.0 wt% didymium, where the UTS increased by 26.9% and the elongation by 7.7%. The feather-shaped Sn-x(Nd,Pr)(y) phase changes to a stick-shaped Sn-x,(Nd,Pr)(y) phase when the didymium addition is over 2 wt%. As a consequence, the tensile strength and especially the elongation show an obvious decline. (c) 2006 Elsevier B.V. All rights reserved.
引用
收藏
页码：348 / 355
页数：8
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