镍基单晶高温合金定向粗化行为的取向依赖性 Ⅰγ’形态的SEM观察  

ORIENTATION DEPENDENCE OF DIRECTIONAL COARSENING BEHAVIOR IN A NICKEL-BASE SINGLE CRYSTAL SUPERALLOY I SEM Observation of γ' Precipitate Morphology

作　　者：沙玉辉[1] 张静华[1] 徐永波[1] 胡壮麒[1] 

机构地区：[1]中国科学院金属研究所材料疲劳与断裂国家重点实验室,沈阳110015

出　　处：《金属学报》2000年第3期254-257,共4页Acta Metallurgica Sinica

基　　金：国家自然科学基金资助项目!59871052

摘　　要：利用ＳＥＭ对镍基单晶高温合金中γ’颗粒定向粗化及其取向依赖性进行了观察，结果显示， γ’颗粒形态依赖于应力轴取向，而粗化方向均为〈１００〉．The directional coarsening of γ' precipitates and its orientation dependence were observed by SEM, and the results showed that the γ' precipitate morphology depends on stress axis, while the coarsening directions of γ' precipitate are along (100} for various stress axis.

关 键 词：镍基 单晶 高温合金 定向粗化 取向依赖性 

分 类 号：TG146.15[一般工业技术—材料科学与工程]