镍基合金中沉淀相微结构AP—FIM研究  

AP-FIM Investigation of Microstructure of Precipitate Phase of A Nickel Base Superailoy

作　　者：任大刚[1] 

机构地区：[1]中国科学院金属研究所

出　　处：《电子显微学报》1992年第4期296-299,共4页Journal of Chinese Electron Microscopy Society

摘　　要：用场离子显微镜原子探针(AP—FIM)研究GH49镍基合金中沉淀相的微结构。场离子显微象的观察及原子探针分析表明;基体(r相)不显示出有序结构而沉淀相(r＇相)显示出有序结构,用AP分析测定了沉淀相化学成份。实验结果表明试样经蠕变后沉淀相中Al和Cr的分布与蠕变前有明显的变化。The purpose of the present work is to study the microstructure of a precipitate phase in the nickel base su- peralloy GH49 by AP-FIM. Observations of field ion images and AP amalysis show that the matrix structure (r) does not appear ordered while the r' phase does. The Composition of the precipitate phase is obtained by AP analysis. The experiment indicates that the distribution of Al and Cr in the precipitate phase after sample creep- age is clearly different from tlae sample that has not suffered creepage.

关 键 词：镍基合金 沉淀相 结构 显微镜 

分 类 号：TG142.15[一般工业技术—材料科学与工程]