Graphite growth morphologies in high Al castiron
2015 (English)In: Advances in the Science and Engineering of Casting Solidification: An MPMD Symposium Honoring Doru Michael Stefanescu, The Minerals, Metals, and Materials Society, 2015, 323-330 p.Conference paper (Refereed)
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, Sr and Ce on graphite morphology was investigated. In the last experiments, the effect of Ca and Ce in the absence of Mg was studied. The samples were analyzed using field emission-scanning electron microscope (FE-SEM) and energy dispersive x-ray spectroscopy (EDX). In alloys with high Al and Si, the formation of chunky graphite is crucial for control. The effects of Al, Si and inoculants were analyzed 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
The Minerals, Metals, and Materials Society, 2015. 323-330 p.
Graphite morphology, High Al cast iron, Micro-segregation, SiAl alloy
Metallurgy and Metallic Materials
IdentifiersURN: urn:nbn:se:kth:diva-170488DOI: 10.1002/9781119093367.ch38ScopusID: 2-s2.0-84931452350ISBN: 9781119082385OAI: oai:DiVA.org:kth-170488DiVA: diva2:839211
Advances in the Science and Engineering of Casting Solidification: An MPMD Symposium Honoring Doru Michael Stefanescu - TMS 2015 144th Annual Meeting and Exhibition, 15 March 2015 through 19 March 2015, Walt Disney World Orlando, United States
QC 201507022015-07-022015-07-012015-07-02Bibliographically approved