摘要
研究了Sb对Mg2Si增强相及基体组织的细化效果及机理。结果表明,Sb加入可生成Mg3Sb2,Mg3Sb2能够作为Mg2Si的异质核心,使得Mg2Si由汉字状变成颗粒状,并弥散地分布。同时,基体组织也得到细化,改善了合金的力学性能。加入0.8%的Sb后,合金的抗拉强度提高了12.2%。
The refining effect and mechanism of Sb on Mg2Si and the microstructure of the base alloy were investigated. It indicated that there were Mg3 Sb2 particles in the alloys by addition Sb and Mg3 Sb2 can promote the formation of fine polygonal type Mg2 Si by providing nucleation site. Meanwhile, the grain size of Sb modified alloy is finer than that of base alloy. The improved microstructure results in the improvement in mechanical properties. The ultimate tensile strength was increased by 12.2% with 0.8% Sb addition.
出处
《塑性工程学报》
CAS
CSCD
北大核心
2009年第3期177-181,共5页
Journal of Plasticity Engineering
基金
国家自然科学基金资助项目(50465003
50765005)
江西省科技厅和江西省教育厅资助项目
关键词
MG2SI
Sb变质
异质形核
性能
Mg2Si
Sb modification
heterogeneous nucleation
mechanical properties
