DD6高温合金定向凝固枝晶生长的数值模拟研究<sup>*</sup>

DD6高温合金定向凝固枝晶生长的数值模拟研究^*

张航, 许庆彦, 史振学, 柳百成

NUMERICAL SIMULATION OF DENDRITE GRAIN GROWTH OF DD6 SUPERALLOY DURING DIRECTIONAL SOLIDIFICATION PROCESS

ZHANG Hang, XU Qingyan, SHI Zhenxue, LIU Baicheng

表2 DD6高温合金枝晶间距的实验与模拟对比

Table 2 Experimental and simulated results of dendritic arm spacing of DD6 superalloy

Height mm	1^st arm spacing $λ_{1}$ / μm		2^nd arm spacing $λ_{2}$ / μm		G K·mm^-1
Height mm	Exp	Simul	Exp	Simul	G K·mm^-1
10	128.1	133.6	49.4	40.1	4.77
14	206.6	196.6	62.7	49.5	4.10
18	211.0	208.4	58.8	45.5	3.30
26	223.9	201.2	57.6	51.2	2.26