镍基单晶高温合金定向粗化行为的取向依赖性 Ⅱ有限元分析  

ORIENTATION DEPENDENCE OF DIRECTIONAL COARSENING BEHAVIOR IN A NICKEL-BASE SINGLE CRYSTAL SUPERALLOY Ⅱ Finite Element Analysis

作　　者：沙玉辉[1] 陈昌荣[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258-261,共4页Acta Metallurgica Sinica

基　　金：国家自然科学基金资助项目! 59871052

摘　　要：本文对点阵错配力和施加外载后的内应力大小及分布进行了有限元计算．结果表明，基体通道的应力分布与γ’颗粒的定向粗化有密切联系，定向粗化的驱动力是塑性变形不均匀分布导致的错配力各向异性松弛。Finite element analysis was applied to the amplitude and distribution of internal stress before and after loading. The results showed that the stress distribution in matrix channels is closely related with the directional coarsening, and the driving force for directional coarsening is the anisotropic relaxation of lattice misfit resulted from the inhomogeneous distribution of plastic deformation.

关 键 词：镍基 单晶 高温合金 有限元 定向粗化 Mises应力 

分 类 号：TG146.15[一般工业技术—材料科学与工程]