二次枝晶取向对镍基高温合金晶粒竞争生长行为的影响
张小丽1, 冯丽2, 杨彦红3, 周亦胄3, 刘贵群1(
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Influence of Secondary Orientation on Competitive Grain Growth of Nickel-Based Superalloys
ZHANG Xiaoli1, FENG Li2, YANG Yanhong3, ZHOU Yizhou3, LIU Guiqun1()
)
图 1. 定向凝固过程中晶粒竞争生长机制示意图
Fig.1. Schematic diagrams showing the mechanism of grain selection in the directional solidification process (Grains A1/A2 and B are favorably and unfavorably oriented grains, respectively； ΔZA, ΔZB—undercooling of grains A and B, respectively)
(a) Walton-Chalmers model (b) summary of experimental results
