Morphology and Orientation Selection of Non-Metallic Inclusions in Electrified Molten Metal

Zhao, Z. C. and Qin, R. S. (2017). Morphology and Orientation Selection of Non-Metallic Inclusions in Electrified Molten Metal. Metallurgical and Materials Transactions B, 48(5) pp. 2781–2787.

DOI: https://doi.org/10.1007/s11663-017-1028-3

Abstract

The effect of electric current on morphology and orientation selection of non-metallic inclusions in molten metal has been investigated using theoretical modelling and numerical calculation. Two geometric factors, namely the circularity (f_c) and alignment ratio (f_e) were introduced to describe the inclusions shape and configuration. Electric current free energy was calculated and the values were used to determine the thermodynamic preference between different microstructures. Electric current promotes the development of inclusion along the current direction by either expatiating directional growth or enhancing directional agglomeration. Reconfiguration of the inclusions to reduce the system electric resistance drives the phenomena. The morphology and orientation selection follows the routine to reduce electric free energy. The numerical results are in agreement with our experimental observations.

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• Item ORO ID
• 49852
• Item Type
• Journal Item
• ISSN
• 1543-1916
• Project Funding Details

• Funded Project Name	Project ID	Funding Body
  Newton Advanced Fellowship : Study of the electropulse-based superclean steel green processing method	NA150320	The Royal Society
  UK Consortium on mesoscale engineering sciences	EP/L00030X/1	EPSRC

• Academic Unit or School
• Faculty of Science, Technology, Engineering and Mathematics (STEM) > Engineering and Innovation
  Faculty of Science, Technology, Engineering and Mathematics (STEM)
• Depositing User
• Rongshan Qin