喷射成形Al-Zn-Mg-Cu合金时效沉淀相分析  

Analysis for Precipitates of Spray Formed Al-Zn-Mg-Cu Alloy after Aging

作　　者：侯小虎[1] 白朴存[1] 张秀云[1] 董太尚[1] 崔晓明[1] 王娜[1] 

机构地区：[1]内蒙古工业大学,内蒙古呼和浩特010051

出　　处：《稀有金属材料与工程》2010年第A01期332-335,共4页Rare Metal Materials and Engineering

基　　金：国家自然科学基金资助项目(10962005);内蒙古自治区高等学校科学研究项目(NJ05046)

摘　　要：利用喷射成形技术制备了超高强Al12Zn2.4Mg1.1Cu合金。随后对试验合金进行热挤压,758K固溶2h和393K时效20h,利用透射电子显微镜(TEM)对时效后的合金进行形貌、选区电子衍射、高分辨像观察,得到各种沉淀相形貌和析出相与基体的位相关系。经过标定后确定,时效后的合金中存在3种纳米级沉淀相:η′相、GP(II)区、L12-Al3Zr,GP(II)区和Al3Zr与基体共格结合。Ultrahigh strength aluminum alloy Al12Zn2.4Mgl. 1Cu was prepared by spray forming method. Then the experiment alloy was processed by hot extrusion. Solid solution treatment at 758 K for 2 h and aging at 393 K for 20 h. The aged alloy was observed by TEM technology including selected area diffraction, conventional and high-resolution imaging. Afterwards the relationship between precipitate phase morphology, precipitate phase and matrix phase was obtained. It is determined that there are three kinds of nano-scale precipitate phase, η＇ phase, GP（II）-zones and L 12-Al3Zr; the interface of GP（II）-zones with L12-A13Z are coherent.

关 键 词：喷射成形 超高强铝合金 沉淀相 

分 类 号：TG156.92[金属学及工艺—热处理]