Solidification Nucleation Model Based on Small Wetting Angle Under Pulsed Magnetic Field

doi:10.12068/j.issn.1005-3026.2015.04.009

Journal of Northeastern University Natural Science ›› 2015, Vol. 36 ›› Issue (4): 493-497.DOI: 10.12068/j.issn.1005-3026.2015.04.009

• Materials & Metallurgy • Previous Articles Next Articles

Solidification Nucleation Model Based on Small Wetting Angle Under Pulsed Magnetic Field

CHEN Guo-jun¹， ZHANG Yong-jie²， YANG Yuan-sheng³， HE Ji-cheng¹

1. Key Laboratory of Electromagnetic Processing of Materials， Ministry of Education， Northeastern University， Shenyang 110819， China; 2. Institute of Energy and Environmental Research， Central Research Institute of Baosteel Group， Shanghai 201900， China; 3. Institute of Metal Research， Chinese Academy of Sciences， Shenyang 110016， China.

Received:2014-04-23 Revised:2014-04-23 Online:2015-04-15 Published:2014-11-07
Contact: CHEN Guo-jun
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Abstract

Abstract: Heterogeneous nucleation of small wetting angle under pulsed magnetic field (PMF) was theoretically analyzed on the basis of the Ma nucleation model， with the solidification uncleation model established. The effects of magnetic induction intensity of PMF on the critical nucleation radius and critical undercooling were investigated. The results showed that Gibbs free energy of the model has nothing to do with shape coefficient of heterogeneous nucleation substrate. When the work done by magnetic pressure is the same order as solid-liquid free energy difference under low undercooling， the PMF can effectively reduce the critical uncleation radius， and the effect of the PMF on the critical uncleation radius can be ignored under high undercooling (>20℃). When the substrate size is larger， the undercooling of critical uncleation decreases with increasing magnetic induction intensity of the PMF.

Key words: grain refinement, heterogeneous nucleation, pulsed magnetic field(PMF)；small wetting angle；critical nucleation radius；critical nucleation undercooling

CLC Number:

TF771
TG244

CHEN Guo-jun， ZHANG Yong-jie， YANG Yuan-sheng， HE Ji-cheng. Solidification Nucleation Model Based on Small Wetting Angle Under Pulsed Magnetic Field[J]. Journal of Northeastern University Natural Science, 2015, 36(4): 493-497.

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Solidification Nucleation Model Based on Small Wetting Angle Under Pulsed Magnetic Field

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