Small-angle X-ray scattering investigation of aging behavior of Al-Cu-Mg-Ag alloys using synchrotron radiation
来源期刊：Rare Metals2012年第6期
论文作者：ZHANG Jianboa, b, ZHANG Yongana, ZHU Baohonga, LIU Ruiqinga, LI Zhihuia, and LI Xiwua a State Key Laboratory of Nonferrous Metals and Processes, General Research Institute for Nonferrous Metals, Beijing , China b Engineering Research Institute, Jiangxi University of Science and Technology, Ganzhou , China
文章页码：537 - 540
摘 要：The aging behavior of Al-Cu-Mg-Ag alloys with high Cu/Mg was studied by transmission electron microscopy （TEM） and small-angle X-ray scattering （SAXS） using synchrotron radiation. TEM study reveals that the major strengthening phases of the alloy after aging at 160?C for 10 h are Ω and less θ′. SAXS study shows that the scattering patterns are composed of several concentric circles at the beginning of aging process, which is replaced by the butterfly-wings scattering patterns with the increase of aging time. The butterfly-wings scattering patterns are composed of several branches. The angles between the branches are roughly equal to that between the habit planes of precipitates. The evolution of Guinier radius with aging time indicates the good coarsening resistance of the precipitates. The evolution of integrated intensity is consistent with the classical two-step precipitation process.
ZHANG Jianboa, b, ZHANG Yongana, ZHU Baohonga, LIU Ruiqinga, LI Zhihuia, and LI Xiwua a State Key Laboratory of Nonferrous Metals and Processes, General Research Institute for Nonferrous Metals, Beijing 100088, China b Engineering Research Institute, Jiangxi University of Science and Technology, Ganzhou 341000, China
摘 要：The aging behavior of Al-Cu-Mg-Ag alloys with high Cu/Mg was studied by transmission electron microscopy （TEM） and small-angle X-ray scattering （SAXS） using synchrotron radiation. TEM study reveals that the major strengthening phases of the alloy after aging at 160?C for 10 h are Ω and less θ′. SAXS study shows that the scattering patterns are composed of several concentric circles at the beginning of aging process, which is replaced by the butterfly-wings scattering patterns with the increase of aging time. The butterfly-wings scattering patterns are composed of several branches. The angles between the branches are roughly equal to that between the habit planes of precipitates. The evolution of Guinier radius with aging time indicates the good coarsening resistance of the precipitates. The evolution of integrated intensity is consistent with the classical two-step precipitation process.
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