Dendritic Growth Pattern and Dendritic Network Distortion in the Platform of a Ni-based Superalloy

doi:10.1016/j.jmst.2013.09.013

J. Mater. Sci. Technol.

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Dendritic Growth Pattern and Dendritic Network Distortion in the Platform of a Ni-based Superalloy

Xiaoli Zhang, Yizhou Zhou, Yanyun Han, Tao Jin, Xiaofeng Sun

Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, China

Received:2013-03-03 Revised:2013-04-15 Online:2014-03-15 Published:2014-03-17
Contact: Y. Zhou
Supported by:
National Basic Research Program of China (Grant No. 2010CB631206); the National Natural Science Foundation of China (Grant Nos. 51271186, U1037601, 50931004, 51204156 and 51101153); and the Program of “One Hundred Talented People” of the Chinese Academy of Sciences.

Abstract

Abstract:

The pattern of dendritic growth and distortion of dendritic network in the platform have been investigated by one mold casting with different platform length during directional solidification. As the platform length elongates, the symmetry of dendritic growth along left and right edges gradually worsens in platform base. While the platform length reaches 14 mm, the distortion of dendritic network is first observed in outward platform. It is found that the distortion of dendritic network along platform inside is more serious than that along platform edges. Both [001] deviation and accumulated misorientation along platform inside, up to 9° and 16.3°, respectively, are far greater than those along left–outward–right edges. The deformation of dendritic network in a platform may be caused by the asymmetry of the solidification front at the mush zone.

Key words: Superalloy, Directional solidification, Dendritic growth, Grain orientation, Platform

Xiaoli Zhang, Yizhou Zhou, Yanyun Han, Tao Jin, Xiaofeng Sun. Dendritic Growth Pattern and Dendritic Network Distortion in the Platform of a Ni-based Superalloy[J]. J. Mater. Sci. Technol., DOI: 10.1016/j.jmst.2013.09.013.

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Dendritic Growth Pattern and Dendritic Network Distortion in the Platform of a Ni-based Superalloy

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