Al-Zn-Mg-Cu-Li合金时效过程微结构演化的小角x射线散射研究

Small angle x-ray scattering study on microstructure evolution of the aging process of Al-Zn-Mg-Cu-Li alloy

应用小角x射线散射技术分析了Al_Zn_Mg_Cu_Li合金在 13 0 ,150和 160℃温度时效 2 4h析出粒子的微结构参数的变化情况 .粒子的半径随着时效温度的增高而增加 ,它的比内表面积和体积百分数随着时效温度的增高而减小 .对Porod曲线q3J(q) q2 的分析表明 。

Small angle x_ray scattering technique wa s used to analyze the variation of microstructure parameters of precipitates in an Al_Zn_Mg_Cu_Li alloy aged at 130, 150 and 160℃ for the same duration. Precipitate particles’ radius increased with aging temperatures, but their spe cific inner surface and integrated intensities decreased with aging tempe ratures. The study on Porod curves q 3J(q)_q 2 indicates that there is a sharp boundary between precipitates and the ma trix.