高温合金单晶铸件中共晶组织分布的表面效应

马德新, 赵运兴, 徐维台, 皮立波, 李重行

Surface Effect on Eutectic Structure Distribution in Single Crystal Superalloy Castings

MA Dexin, ZHAO Yunxing, XU Weitai, PI Libo, LI Zhongxing

图4 变截面试棒铸件的纵截面和横截面形貌，显示出环形上表面的共晶聚集现象

Fig.4 Longitudinal section morphology of a bar sample with abrupt decrease in diameter (a) and the corresponding transverse section morphology (b), showing the eutectics accumulation on the ring-shaped upper surface