Phase-Field Simulation of Directional Solidification Microstructure Evolution in a Binary Alloy

Abstract:

In order to obtain the directional microstructure of different supersaturation and growing velocity, three simulations is calculated with different initial temperature. When the initial temperature is 1576K, and the supersaturation and growing velocity are smaller. The average space length of columnar crystals is bigger, and the directional microstructure grows by the wide columnar crystals. Microsegregation is smaller; when the initial temperature is 1574K, the supersaturation and growing velocity increase. when the initial temperature falls to 1566K, the planar interface comes back, and microsegregation decreases rapidly. The directional microstructure grows by the thinnest columnar crystals. At the same time, the transverse solute profiles and solute boundary layer are also talked in this paper.

• Periodical: Advanced Materials Research (Volumes 399-401)
• Pages: 1862-1865
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.399-401.1862
• Online since: November 2011
• Authors: Jin Jun Tang, Jian Zhong Jiang, Chun Hua Tang, Da Hui Chen, Xiu Rong Zhu, Rong Wang, Zhao Hui Gong
• Keywords: Directional Solidification, Initial Temperature, Numerical Simulation, Phase-Field Method

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