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The experimental study of nodular cast iron volume changes during solidification
KTH, School of Industrial Engineering and Management (ITM), Materials Science and Engineering.ORCID iD: 0000-0002-7474-2053
KTH, School of Industrial Engineering and Management (ITM), Materials Science and Engineering.ORCID iD: 0000-0003-2449-9232
2018 (English)In: 11th International Symposium on the Science and Processing of Cast Iron, SPCI-XI 2017, Trans Tech Publications Inc., 2018, Vol. 925, p. 140-146Conference paper, Published paper (Refereed)
Abstract [en]

The volume changes during solidification of Nodular Cast Iron (NCI) in the sand mold studied using Linear Variable Differential Transformer (LVDT). Both hypo- and hyper-eutectic compositions are considered by adjusting the carbon fraction in the composition during the experimental studies. The microstructural analysis and measurements are taken from the samples to evaluate the different phases present, the nodule count and size distributions. At the beginning of solidification, the experimental result shows the volume change is negligible. During the eutectic growth, the samples expand until the end of solidification. The displacement measurement shows the expansion continued when solidification finished. The volume change studies during solidification indicate that as the carbon fraction increases the volume expansion decreases. On the other hand, it is found that the pore fraction decreases as the volume expansion decreases. The fraction of primary austenite decreases as the fraction of carbon increases, and that leads to having a lower pore fraction.

Place, publisher, year, edition, pages
Trans Tech Publications Inc., 2018. Vol. 925, p. 140-146
Series
Materials Science Forum, ISSN 0255-5476 ; 925
Keywords [en]
Hypo- and Hyper-eutectic, LVDT, NCI, Nodule count, Solidification, Volume changes
National Category
Metallurgy and Metallic Materials
Identifiers
URN: urn:nbn:se:kth:diva-238425DOI: 10.4028/www.scientific.net/MSF.925.140Scopus ID: 2-s2.0-85050031108ISBN: 9783035710557 (print)OAI: oai:DiVA.org:kth-238425DiVA, id: diva2:1261369
Conference
11th International Symposium on the Science and Processing of Cast Iron, SPCI-XI 2017, Jonkoping, Sweden, 4 September 2017 through 7 September 2017
Note

QC 20181107

Available from: 2018-11-07 Created: 2018-11-07 Last updated: 2018-11-07Bibliographically approved

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Tadesse, AbelFredriksson, Hasse

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