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On Factors Influencing Macro Shrinkage Porosity Formation in Compacted Graphite Iron
KTH.
Scania CV AB.
Jönköping University, School of Engineering, JTH. Research area Materials and manufacturing – Casting. (Foundry Technology)
2014 (English)In: Materials Science Forum, ISSN 0255-5476, E-ISSN 1662-9752, Vol. 790-791, p. 429-434Article in journal (Refereed) Published
Abstract [en]

The purpose of this work is to investigate the relation between macro shrinkage porosity level and the level of graphite nodularity, gaseous elements and the size of eutectic colonies in compacted graphite iron. Also, the internal shrinkage-pore surfaces were analyzed by SEM and EDS techniques. It was found that samples with higher shrinkage porosity level, contained higher level of graphite nodularity and number of eutectic colonies. Also, samples with higher level of gaseous elements (Hydrogen and Nitrogen) showed higher tendency to shrinkage porosity formation. Austenite dendrites with different morphologies were observed inside the pores, indicating that were formed at different times during solidification, and the surface of the pores were covered with a layer of carbon film indicating that the pores were internal, with no contact to the atmosphere at elevated temperatures.

Place, publisher, year, edition, pages
Trans Tech Publications, 2014. Vol. 790-791, p. 429-434
Keywords [en]
Austenite dendrite, Compacted graphite iron, EDS, Eutectic colony, Graphite nodularity, SEM, Shrinkage porosity
National Category
Metallurgy and Metallic Materials
Identifiers
URN: urn:nbn:se:hj:diva-25445DOI: 10.4028/www.scientific.net/MSF.790-791.429Scopus ID: 2-s2.0-84901411284ISBN: 9783038350934 (print)OAI: oai:DiVA.org:hj-25445DiVA, id: diva2:774941
Conference
6th International Conference on Solidification and Gravity; Miskolc, Lillafured; Hungary; 2 September 2013 through 5 September 2013
Available from: 2014-12-30 Created: 2014-12-30 Last updated: 2018-09-13Bibliographically approved

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Diószegi, Attila

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CiteExportLink to record
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