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  Effect of antimony on primary graphite growth in cast iron - From Ab-initio calculations to experimental observations

Bleskov, I., Theivwissen, K., Connétable, D., & Lacaze, J. C. (2013). Effect of antimony on primary graphite growth in cast iron - From Ab-initio calculations to experimental observations. In TMS Annual Meeting (pp. 515-521).

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Item Permalink: http://hdl.handle.net/21.11116/0000-0001-D800-B Version Permalink: http://hdl.handle.net/21.11116/0000-0001-D802-9
Genre: Conference Paper

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 Creators:
Bleskov, Ivan1, 2, Author              
Theivwissen, K.2, Author              
Connétable, Damien2, Author              
Lacaze, Jacques C.3, Author              
Affiliations:
1Computational Phase Studies, Computational Materials Design, Max-Planck-Institut für Eisenforschung GmbH, Max Planck Society, ou_1863341              
2CIRIMAT, Université de Toulouse, BP 44362, 31030 Toulouse Cedex 4, France, persistent22              
3CIRIMAT, Université de Toulouse, ENSIACET, 31432 Toulouse Cedex 4, France, ou_persistent22              

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Free keywords: Ab initio calculations; DFT; Experimental observation; Graphite structures; Metallographic observations; Orders of magnitude; Theoretical and experimental; Twin, Cast iron; Exhibitions, Graphite
 Abstract: Chunky graphite - interconnected strings of graphite - is a common degenerate form of nodular graphite associated with the use of rare-earth for melt treatment. Being rare-earth scavenger, antimony is used to eliminate chunky graphite in large castings while it leads to other degenerate forms in small castings. In the present work, both theoretical and experimental approaches of the effect of antimony on graphite growth were attempted. Ab initio calculations of graphite layers and of 11 21 twin boundary showed the graphite structure is modified by Sb absorption, with the twin angle being smoothed and the graphite curved. Experiments were performed with carbon saturated Fe-C-Sb alloys where primary graphite precipitates appeared as long thin curved lamellae contrasting with the thick and straight plates obtained in Fe-C alloys. This similarity in curving effect of Sb at both scales is quite striking as there are four orders of magnitude separating the calculations from the metallographic observations.

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Language(s): eng - English
 Dates: 2013
 Publication Status: Published in print
 Pages: -
 Publishing info: -
 Table of Contents: -
 Rev. Method: -
 Identifiers: BibTex Citekey: Bleskov2013515
ISBN: 978-111860581-3
 Degree: -

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Title: 142nd Annual Meeting and Exhibition: Linking Science and Technology for Global Solutions, TMS 2013
Place of Event: San Antonio, TX, USA
Start-/End Date: 2013-03-03 - 2013-03-07

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Title: TMS Annual Meeting
Source Genre: Proceedings
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Pages: - Volume / Issue: - Sequence Number: - Start / End Page: 515 - 521 Identifier: -