Al－Zn－Mg合金中沉淀相的高分辨研究  

THE HREM STUDY OF THE PRECIPITATES IN AN Al-Zn-Mg ALLOY

作　　者：焦汇胜[1] 李春志[1] 

机构地区：[1]北京航空材料研究所,中国科学院金属研究所

出　　处：《航空材料学报》1995年第1期35-38,共4页Journal of Aeronautical Materials

摘　　要：通过高分辨电子显微术对Ｔ７４状态下的Ａｌ－Ｚｎ－Ｍｇ合金中沉淀相进行了研究。结果发现在这种热处理状态下Ｇ．Ｐ．区、η′相及η相是共存的。Ｇ．Ｐ．区呈片状结构，沿（１１１）基体面形成。η′相具有六方结构，晶格常数是ａ＝０．４９６ｎｍ，ｃ＝１．４０３ｎｍ。η′相与基体的取向关系为：（００１）η还发现一种新的η相与基体的取向关系：A study of precipitate phases in an Al-Zn-Mg alloy in the T74 condition has been conducted by meansof high resolution electron microscopy. It has been observed that G.P. zones,η′and η phases exist simultaneously in the matrix. The G.P. zones are plate-like forming on (111) matrix plane. The η' phase has ahexagonal structure with a=0. 496nm,c=1. 403nm and the orientation relationship with the matrix is A new orientation relationship between the η phase and the matrix isfound to be (001)η

关 键 词：铝锌镁合金 高分辨 电子显微术 微观组织 沉淀相 

分 类 号：TG115.211[金属学及工艺—物理冶金] TG146.21[金属学及工艺—金属学]