Simulation of stray grain formation during unidirectional solidification of IN738LC superalloy

被引：10

作者：

Li Xiang-mei ^{[1
]}

Zhang Jie-yu ^{[1
]}

Wang Bo ^{[1
]}

Ren Zhong-ming ^{[1
]}

Zhou Guo-zhi ^{[2
]}

机构：

[1] Shanghai Univ, Shanghai Key Lab Modern Met & Mat Proc, Shanghai 200072, Peoples R China

[2] Beijing Univ Sci & Technol, Sch Met & Ecol Engn, Beijing 100083, Peoples R China

来源：

JOURNAL OF CENTRAL SOUTH UNIVERSITY OF TECHNOLOGY | 2011年 / 18卷 / 01期

关键词：

computer simulation; unidirectional solidification; stray grain; grain structure; CELLULAR-AUTOMATON MODEL; ENVELOPE TRACKING MODEL; MONTE-CARLO-SIMULATION; TURBINE BLADE; MICROSTRUCTURE; PREDICTION; GROWTH; ALLOY;

D O I：

10.1007/s11771-011-0653-2

中图分类号：

TF [冶金工业];

学科分类号：

0806 ;

摘要：

The influence of casting parameters on stray grain formation of a unidirectionally solidified superalloy IN738LC casting with three platforms was investigated by using a 3D cellular automaton-finite element (CAFE) model in CALCOSOFT package. The model was first validated by comparison of the reported grain structure of Al-7%Si (mass fraction) alloy. Then, the influence of pouring temperature, heat flux of the lateral surface, convection heat coefficient of the cooled chill and mean undercooling of the bulk nucleation on the stray grain formation was studied during the unidirectional solidification. The predictions show that the stray grain formation is obviously sensitive to the pouring temperature, heat flux and mean undercooling of the bulk nucleation. However, increasing the heat convection coefficient has little influence on the stray grain formation.

引用

页码：23 / 28

页数：6

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