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Analysis of local conditions on graphite growth and shape during solidification of ductile cast iron
File(s)
Author(s)
Tiedje, Niels S
Bjerre, Mathias K
Azeem, Mohammed A
Hattel, Jesper H
Lee, Peter D
Type
Journal Article
Abstract
3D X-ray tomography recordings have been used to study graphite growth during solidification of ductile cast iron. Using data from such recordings, it is shown how local growth conditions influence growth rate and morphology of nodules during solidification. Experiments show that it is common for nodules to gradually change shape during solidification so that sphericity decreases. It is also found that different shaped nodules can evolve in direct contact with liquid iron and also after they are encapsulated in austenite. It is observed that a significant proportion of originally complete spherical nodules become less spherical via formation of protrusions on the surface; these new surfaces are observed to grow relatively faster. It is shown that encapsulation of the graphite nodule by austenite may be incomplete and that at the end of solidification, partial encapsulation and the effect of the number of nearest graphite nodules play a crucial role in determining the final graphite morphology.
Date Issued
2018-11-01
Date Acceptance
2018-10-15
Citation
Transactions of the Indian Institute of Metals, 2018, 71 (11), pp.2699-2705
URI
DOI
ISSN
0972-2815
Publisher
Springer Verlag
Start Page
2699
End Page
2705
Journal / Book Title
Transactions of the Indian Institute of Metals
Volume
71
Issue
11
Copyright Statement
© 2018 The Indian Institute of Metals. The final publication is available at Springer via https://dx.doi.org/10.1007/s12666-018-1448-z.
Identifier
http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000449788900016&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=1ba7043ffcc86c417c072aa74d649202
Subjects
Science & Technology
Technology
Metallurgy & Metallurgical Engineering
Ductile cast iron
X-ray tomography
Graphite growth
Solidification
EUTECTIC SOLIDIFICATION
MORPHOLOGIES
EVOLUTION
Publication Status
Published
Date Publish Online
2018-10-28