MULTISCALE MODELING OF HEAT TREATMENT PROCESSING FOR SINGLE-CRYSTAL NiBASE SUPERALLOYS

被引：0

作者：

Shen, Chen ^{[1
]}

Suzuki, Akane ^{[1
]}

Konitzer, Douglas G. ^{[2
]}

机构：

[1] GE Global Res, 1 Res Circle, Niskayuna, NY 12309 USA

[2] GE Aviat, 1 Neumann Way, Cincinnati, OH 45215 USA

来源：

PROCEEDINGS OF THE 13TH INTENATIONAL SYMPOSIUM OF SUPERALLOYS (SUPERALLOYS 2016) | 2016年

关键词：

Homogenization modeling; Microsegregation; gamma' precipitation modeling; Single crystal; Rene N515; HOMOGENIZATION; DIFFUSION; NUCLEATION; SIMULATION; PHASES;

D O I：

暂无

中图分类号：

TF [冶金工业];

学科分类号：

0806 ;

摘要：

A multi-component diffusion model coupled with CALPHAD thermodynamic and kinetics data was applied to simulate homogenization heat treatment for Rene N515 on a 2D cross-section. Different from conventional 1D models, spatial dendritic microstructures were explicitly taken into account. The predicted microsegregation evolution agreed well with EPMA experimental data. Incipient melting and topologically closed packed (TCP) phases were simulated. The effects of spatial microstructure and gamma' dissolution were found to be a main reason for deviation of homogenization kinetics from a linear form of In delta similar to t, derived from diffusion equation. gamma' precipitation was simulated for Rene N515 under aging conditions. The predicted gamma' coarsening was found in good agreement with experiment. The precipitation model can be combined with homogenization modeling to correlate heat treatment, residual microsegregation, and gamma' microstructure.

引用

页码：259 / 266

页数：8

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