摘要
研究了Sb元素对AE41(Mg-4A l-1RE)镁合金组织和性能的影响。结果表明,加入Sb后基体中出现了弥散颗粒质点。该颗粒质点相主要为RE2Sb相,但当含Sb量较高时,该颗粒质点主要为RE2Sb相和RESb相的复合物。随着Sb加入量的增加,枝条状A l11RE3相在数量降低的同时在形态上逐渐变短变细,弥散RE-Sb颗粒质点数量和尺寸增大,晶界处零星散布离异共晶β相的数量也提高。加入Sb改善了合金的流动性。合金的拉伸强度、塑性、硬度和冲击韧性随着含Sb量的增加而提高,但Sb含量过大时合金的综合力学性能下降。
Effects of antimony on microstructure and properties of AE41 （Mg-4Al-1 RE）magnesium alloy were investigated. Results indicate that antimony additions cause formation of dispersed particles in the alloy matrix, which is mainly RE2Sb, and a complex of RE2Sb and RESb when Sb content is high. When the Sb content increases, the size and amount of the branched intergranular AlH RE3 reduce, while the size and amount of dispersed RE-Sb particles increase, and the amount of discontinuous β phase on grain boundaries increases. Sb additions improves fluidity of the alloys. The tensile strength, elongation, hardness and impact toughness increase firstly with increasing Sb content, however, the mechanical properties reduce at the excessive Sb content.
出处
《航空材料学报》
EI
CAS
CSCD
2005年第6期1-4,10,共5页
Journal of Aeronautical Materials
基金
中国博士后科学基金项目(2005037697)
关键词
AE41镁合金
SB
显微组织
力学性能
AE41 magnesium alloy
Sb
microstructure
mechanical properties
