摘要
研究了合金元素Ce和Sb对Mg-3%Al基合金显微组织和力学性能的影响。结果表明,Ce,Sb元素加入后使β-Mg17Al12相以细小弥散形态分布。只加入Ce元素时,Ce与合金中的Al元素形成针状的Al4Ce相,合金的铸态室温力学性能较Mg-3%Al合金更差;而Ce,Sb元素同时加入时,在基体中形成了弥散分布的CeSb颗粒相,同时抑制了针状的Al4Ce相的生成,合金表现出较好的强度和塑性。与Mg-3%Al合金相比,Mg-3%Al-1%Ce-1%Sb合金的铸态拉伸强度Rm提高了7.5%,伸长率A提高了91%。
The effects of cerium and antimony on as-cast microstructure and mechanical properties of Mg-3%Al alloy were studied.The results showed that adding cerium and antimony could make β-Mg17Al12 phase dispersive distribution,while only Ce added,the ambient mechanical properties of Mg-3%Al-1%Ce alloy were worse than the Mg-3%Al alloy,because of the precipitation of the needle-like Al4Ce phase;however,when the cerium and antimony were added simultaneously,the alloy represented a better plasticity and strength,due to the precipitation of the dispersoid CeSb in the matrix,which inhibited the formation of the needle-like Al4Ce phase.Compared with Mg-3%Al alloy,the ultimate tensile strength Rm of the Mg-3%Al-1%Ce-1%Sb alloy was improved by 7.5% and the elongation rate A was improved by 91%.
出处
《轻金属》
CSCD
北大核心
2010年第2期51-54,共4页
Light Metals
基金
中国博士后科学基金项目(20070410875)
中国教育部博士点基金项目(20060459007)
郑州市科技攻关项目(063SGZG23104)
