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Graphite growth control analysis in high Al cast iron
KTH, School of Industrial Engineering and Management (ITM), Materials Science and Engineering.
KTH, School of Industrial Engineering and Management (ITM), Materials Science and Engineering.
2016 (English)In: International Journal of Cast Metals Research, ISSN 1364-0461, E-ISSN 1743-1336, Vol. 29, no 5, 272-278 p.Article in journal (Refereed) Published
Abstract [en]

High Si and Al cast iron has been investigated experimentally and thermodynamically. Alloys were prepared in the laboratory with low to high Al and Si concentrations. Experiments were performed using Mg treatment of the melt. In another series of experiments, the effect of Ca and Ce in the absence of Mg was studied. The samples were analysed using scanning electron microscope and energy-dispersive X-ray spectroscopy. In alloys with high Al and Si content, the formation of chunky graphite is crucial for control. The effects of Al, Si and inoculants were analysed with the help of thermodynamics. It was found that the activity of oxygen changed due to the high concentrations of Al and Si, which influenced the nucleation of MgO and other oxides in the melt. The oxygen level in the melt determines the graphite morphology.

Place, publisher, year, edition, pages
Taylor & Francis, 2016. Vol. 29, no 5, 272-278 p.
Keyword [en]
Graphite morphology, High Al cast iron, SiAl alloy, Microsegregation
National Category
Metallurgy and Metallic Materials
Identifiers
URN: urn:nbn:se:kth:diva-196649DOI: 10.1080/13640461.2016.1174454ISI: 000386206200005ScopusID: 2-s2.0-84978538799OAI: oai:DiVA.org:kth-196649DiVA: diva2:1047256
Note

QC 20161117

Available from: 2016-11-17 Created: 2016-11-17 Last updated: 2016-11-17Bibliographically approved

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Citation style
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