Criterion for Dendrite Fragmentation of Steel under Imposition of Linear Traveling EMS

Jin Chen; Zhi-Jian Su; Keiji Nakajima; Ji Cheng He

doi:10.4028/www.scientific.net/AMR.148-149.84

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HomeAdvanced Materials ResearchAdvanced Materials Research Vols. 148-149Criterion for Dendrite Fragmentation of Steel...

Criterion for Dendrite Fragmentation of Steel under Imposition of Linear Traveling EMS

Abstract:

In the fragmentation theory of T. Campanella et al, the local remelting of dendrite arms is induced by the solute-rich fluid flow. Based on this theory, the effects of linear EMS intensity and solute content on CET of steel are investigated. The conclusions are as follows: The criterion for dendrite fragmentation under linear EMS is derived based on dendrite fragmentation theory by T. Campanella et al. And the criterion is verified with steel experiments. It is valid for steel under the Linear EMS. Investigation is carried out on relation between critical volume fraction of solid and solute content at the time of dendrite fragmentation (CET occurrence). It is concluded that critical volume fraction of solid is small with low EMS intensity and it decreases with the increase of solute content (C, Mn). The reason is that it causes that flow in the mushy zone becomes small which leads to CET occurrence difficult.

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Advanced Materials Research (Volumes 148-149)

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84-91

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https://doi.org/10.4028/www.scientific.net/AMR.148-149.84

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Online since:

October 2010

Authors:

Jin Chen, Zhi-Jian Su, Keiji Nakajima, Ji Cheng He

Keywords:

CET, Dendrite Fragmentation, EMS, Fraction Solid, Secondary Arm Spacing

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