微量Sc、Zr对Al-Mg合金的组织和力学性能的影响

Effect of Limited Content Sc and Zr on Microstructure and Tensile Property of Al-Mg Alloy

利用金相显微镜、扫描电镜和透射电镜研究了添加微量 Sc、Zr的 Al- Mg合金不同处理态的显微组织与力学性能。结果表明 :微量 Sc、Zr对 Al- Mg合金的铸态组织有强烈的细化晶粒作用 ;对力学性能具有明显强化 ,其强化机制为细晶强化、亚结构强化和弥散相质点的直接强化作用。

Tensile property and microstructure of Al-Mg alloy with limited content Sc,Zr in various treatments have been studied by using OM,SEM and TEM techniques.The results show that limited content of Sc,Zr refines the grains of cast alloys effectively,improves the tensile property obviously.The strengthening mechanism is effect of refined grain,substructure and dispersed particles itself.