Parameters Affecting Dendrite Growth of Fe-C Alloy in a Forced Flow

Abstract:

The phase-field model coupling with the concentration field and flow field is used to simulate the dendrite growth during isothermal solidification of Fe-C alloy in a forced flow. The effects of noise amplitude and interface thickness on the dendrite growth are studied. The results indicate that with noise amplitude increasing, the secondary dendrite arm average space(SDAAS) on the the upstream of the lateral principal branch decreases, but the dendrite tip velocity remained about the same. With an increase in the interface thickness, the principal and secondary branch of dendrite degenerated, the equilibrium morphology of the crystal changes from developed dendrite to compact dendrite, the dendrite tip solute concentration decreases first, then increases slowly.

• Periodical: Advanced Materials Research (Volumes 602-604)
• Pages: 631-634
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.602-604.631
• Online since: December 2012
• Authors: Xun Feng Yuan, Yan Yang
• Keywords: Dendrite Growth, Forced Flow, Interface Thickness, Noise Amplitude, Phase-Field

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