Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
7999928 | Journal of Alloys and Compounds | 2015 | 5 Pages |
Abstract
The solidification behaviors of a Mo-rich Ni3Al based single crystal superalloy at different withdrawal rates were investigated. Experimental analysis and thermodynamic calculation (by JMatPro) both indicated that the high Al and Mo contents in residual liquid promoted the precipitations of γⲠand Mo-rich phases at the last stage of solidification. Mo-rich phase in the cellular microstructure was only α-Mo phase, while two types of Mo-rich phase-α-Mo and γ/NiMo eutectic phases existed in the dendritic microstructures. Solid back diffusion during solidification led to the volume fraction of interdendritic precipitation initially increasing and then decreasing with increasing withdrawal rate.
Related Topics
Physical Sciences and Engineering
Materials Science
Metals and Alloys
Authors
Cheng Ai, Xinbao Zhao, Lei Liu, Heng Zhang, Yi Ru, Yanling Pei, Jian Zhou, Shusuo Li, Shengkai Gong,