Sc对Al-Li-Cu-Mg-Ag-Zr合金组织和性能的影响

Effect of Scon Microstructure and Pr operties of Al-Li-Cu-Mg-Ag-Zr Alloy

摘要:

采用拉伸试验、金相、透射电镜、扫描电镜等测试手段，研究了Sc对Al-K-Cu-Mg-Ag-Zr合金的显微组织对拉伸性能的影响。结果表明，Sc细化了合金晶粒，促进了T1相的析出和均匀弥散分布，在一定程度上改变了合金的断裂行为，能使合金获得更好的综合机械性能。

Abstract:

The effect of Sc on microstructure an d tensile p roperties of Al-Li-Cu-Mg-Ag-Zr alloy has been studied using o ptical and t ransmission electron microscopy and scanning electron microscopy.The results sh ow that addition of Sc may refine the gra in size,and encourages the homogeneou s precipitation of T 1 phase throughout the matrix,The wid espread precipitation of T 1 phase promotes homogeneous deforma tion thereby improving the mechanical pr operties of these trace-Sc containi ng.