摘要
真空条件下,以质量分数0.8%Sb元素替代AE42镁合金中部分稀土元素,研究了合金显微组织和力学性能的变化。研究结果表明:AE42镁合金的铸态显微组织主要由α-Mg基体、针状Al11RE3相组成;合金中加入Sb元素后,合金基体中针状Al11RE3相数量减少、形态变短变细,同时基体中出现了-βMg17Al12相和弥散颗粒质点,该弥散颗粒主要为RE2Sb相。实验合金中Sb元素含量保持不变,随着合金中RE含量的增加,合金的力学性能逐渐提高;当RE含量达到1.3%时合金的力学性能达到了AE42镁合金的水平。
The microstructure and properties of AE42 magnesium alloy were investigated by substituting a portion of RE metals with 0.8wt% Sb. Results indicate that the as-cast microstructure of AE42 was typically dendritic and composed of a matrix and some needle-shaped interphases Al11 RE3 ;antimony addition cause formation of dispersed particles in the alloy matrix,which is mainly RE2 Sb,and a complex of RE2 Sb and RESb st low RE content. As RE content decreased, the size and amount of the branched intergranular Al11RE3 were reduced,while these of dispersed RE-Sb particles increased. For fixed Sb content and increasing RE content the mechanical properties increased firstly. When the RE content was 1. 3%, the mechanical properties of alloy was nearly the same with AE42 magnesium alloy.
出处
《太原理工大学学报》
CAS
北大核心
2009年第1期56-59,共4页
Journal of Taiyuan University of Technology
基金
国家自然科学基金国际合作项目(5031140138)
国家自然科学基金资助项目(20271037
20471041)
关键词
镁合金
SB
显微组织
力学性能
magnesium alloys
Sb
microstructure
mechanical properties
