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Criterion for Dendrite Fragmentation of Carbon Steel under Imposition of Linear Travelling EMS
KTH, School of Industrial Engineering and Management (ITM), Materials Science and Engineering, Applied Process Metallurgy.
2009 (English)In: STEEL RESEARCH INTERNATIONAL, ISSN 1611-3683, Vol. 80, no 11, 824-833 p.Article in journal (Refereed) Published
Abstract [en]

In this study the columnar-to-equiaxed transition (CET) of carbon steel with 0.22-0.98 mass%C is investigated, based on the dendrite fragmentation theory of T. Campanella et al. The following conclusions are obtained: The criterion for dendrite fragmentation under linear EMS is obtained and verified by the 0.22-0.98 mass%C steel experiments. Investigation is carried out on the relation between the superficial velocity of the liquid phase and the actual velocity of the interdendritic liquid and the volume fraction of solid at the time of dendrite fragmentation (CET occurrence). At the same superficial velocity, the dendrite fragmentation critical volume fraction of solid is smaller in the case of high carbon steel. As a result, the CET occurrence is more difficult in the case of high carbon steel. Dendrite fragmentation induced by EMS is confirmed by the fragments of dendrite arms observed in the macrostructure. The length of dendrite fragmentation observed is about 1mm

Place, publisher, year, edition, pages
2009. Vol. 80, no 11, 824-833 p.
Keyword [en]
EMS, continuous castings carbon steel, secondary arm spacing, dendrite fragmentation, fraction of solid
National Category
Engineering and Technology
URN: urn:nbn:se:kth:diva-32706DOI: 10.2374/SRI09SP014ISI: 000272027100006ScopusID: 2-s2.0-73149119613OAI: diva2:411745
QC 20110419Available from: 2011-04-19 Created: 2011-04-18 Last updated: 2011-04-19Bibliographically approved

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