Study of Solid/Liquid Interface of Ti46Al0.5W0.5Si Ingot Directionally Solidified by a Near-Rectangular Cold Crucible

Abstract:

In this study, Ti46Al0.5W0.5Si ingots were directionally solidified by a near-rectangular cold crucible under different process parameters. These process parameters include the electromagnetic stirring, the crucible configuration and the molten drop, all of them have important effect on the S/L interface. The effects of the parameters on the solid/liquid (S/L) interface morphology were investigated, and the mechanisms of the parameters influencing the S/L interface were discussed and revealed. Results showed that the typical S/L interface of the ingots was presented as a curved ‘W-type’ shape. The uneven temperature distribution in the front of the solidified interface is the main reason for a curved S/L interface. Further, the requirements for obtaining a planar S/L interface in the process of cold crucible directional solidification were given, which provided a guide for the future work.

• Periodical: Advanced Materials Research (Volumes 472-475)
• Pages: 767-770
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.472-475.767
• Online since: February 2012
• Authors: Rui Run Chen, Jie Ren Yang, Hong Sheng Ding, Jing Jie Guo, Yan Qing Su, Feng Huang, Heng Zhi Fu
• Keywords: Cold Crucible, Directional Solidification, S/L Interface, TiAl Alloys

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