时效析出过程中Al-4.74Cu-0.50Mg-0.30Ag合金的小角度X散射研究  

Small angle X-ray scattering study of Al-4.74Cu-0.50Mg-0.30Ag alloys during aging process

作　　者：张建波[1] 张永安[1] 朱宝宏[1] 王锋[1] 郑毅[2] 熊柏青[1] 王玉柱[3] 

机构地区：[1]北京有色金属研究总院有色金属材料制备加工国家重点实验室,北京100088 [2]钢铁研究总院粉末冶金研究室,北京100088 [3]中国科学院上海应用物理研究所,上海201204

出　　处：《中国有色金属学报》2011年第4期708-713,共6页The Chinese Journal of Nonferrous Metals

基　　金：国家自然科学基金资助项目(50904010)

摘　　要：通过同步辐射小角度X散射实验方法(SAXS)、透射电镜(TEM)和力学性能测试,研究Al-4.74Cu-0.50Mg-0.30Ag合金单级时效过程中的沉淀析出行为。结果表明:合金在单级时效过程中的主要析出相为Ω相和少量的θ′相,随着时效时间的延长,析出相的径向尺寸明显增大,宽度方向变化较小,逐渐演变成为薄片状,析出相尺寸先增大后趋于稳定,其体积分数先增大后减小,最后再逐渐增大,且增大速率降低。The precipitation behavior of Al-4.74Cu-0.50Mg-0.30Ag alloys during single aging process was studied by the synchrotron-radiation small angle X-ray scattering（SAXS）,transmission electron microscopy analysis（TEM） and mechanical property test.The results show that the Ω phase and little θ ′ phases precipitate during single aging process,and with prolonging the aging time,the radial size of the precipitates increases notably,whereas the width of the precipitates increases little,therefore,the shape of the precipitates gradually changes into thin plates.The size of the precipitation increases at the beginning of aging process and goes to a stable value at last.The volume fraction of the precipitation increases at the beginning and then decreases,at last increases in a smaller rate.

关 键 词：铝合金 小角度X散射 沉淀 体积分数 

分 类 号：TG146.2[一般工业技术—材料科学与工程]