Three-dimensional microstructure simulation of Ni-based superalloy investment castings

被引：15

作者：

Pan Dong ^{[1
]}

Xu QingYan ^{[1
]}

Liu BaiCheng ^{[1
]}

机构：

[1] Tsinghua Univ, Minist Educ, Dept Mech Engn, Key Lab Adv Mat Proc Technol, Beijing 100084, Peoples R China

来源：

SCIENCE CHINA-PHYSICS MECHANICS & ASTRONOMY | 2011年 / 54卷 / 05期

关键词：

microstructure; simulation; Ni-based superalloy; investment casting; DIRECTIONAL SOLIDIFICATION; GRAIN SELECTION; CRYSTAL; MORPHOLOGY; ALLOYS;

D O I：

10.1007/s11433-011-4317-x

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

An integrated macro and micro multi-scale model for the three-dimensional microstructure simulation of Ni-based superalloy investment castings was developed, and applied to industrial castings to investigate grain evolution during solidification. A ray tracing method was used to deal with the complex heat radiation transfer. The microstructure evolution was simulated based on the Modified Cellular Automaton method, which was coupled with three-dimensional nested macro and micro grids. Experiments for Ni-based superalloy turbine wheel investment casting were carried out, which showed a good correspondence with the simulated results. It is indicated that the proposed model is able to predict the microstructure of the casting precisely, which provides a tool for the optimizing process.

引用

页码：851 / 855

页数：5

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