定向凝固高温合金晶界形貌的分形描述  

FRACTAL DESCRIPTION OF GRAIN BOUNDARY CONFIGURATION IN DIRECTIONALLY SOLIDIFIED SUPERALLOYS

作　　者：孙力玲[1] 董连科[1] 张静华[1] 胡壮麒[1] 

机构地区：[1]中国科学院金属研究所

出　　处：《金属学报》1994年第5期A200-A203,共4页Acta Metallurgica Sinica

摘　　要：用分形分析的方法定量描述了定向凝固高温合金的树枝晶晶界形貌。结果表明，随着凝固速率的提高，晶界分形维数均增大。还讨论了凝固合金系统熵与晶界分形维数之间的关系。Fractal analysis is adoped to study the change of dendrite grain boundary configurations at different solidification rates in two kinds of superalloys. It is found that fractal dimensions of the grain boundaries in both of the alloys increase with the increase of solidification rates. In addition, the relationship between the fractal dimensions of the grain boundaries and the system entropy in the solidified superalloys is discussed from the physical defination of fractal dimension.

关 键 词：晶界形貌 分形 定向凝固 耐热合金 

分 类 号：TG132.32[一般工业技术—材料科学与工程]