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On the thermal conductivity of CGI and SGI cast irons
Jönköping University, School of Engineering, JTH. Research area Materials and manufacturing – Casting. Jönköping University, School of Engineering, JTH, Materials and Manufacturing.ORCID iD: 0000-0003-2929-7891
Jönköping University, School of Engineering, JTH, Materials and Manufacturing.
Jönköping University, School of Engineering, JTH. Research area Materials and manufacturing – Casting. Jönköping University, School of Engineering, JTH, Materials and Manufacturing.
Jönköping University, School of Engineering, JTH. Research area Materials and manufacturing – Casting. Jönköping University, School of Engineering, JTH, Materials and Manufacturing.ORCID iD: 0000-0002-0101-0062
2017 (English)In: International Journal of Cast Metals Research, ISSN 1364-0461, E-ISSN 1743-1336, p. 1-9Article in journal (Refereed) Epub ahead of print
Abstract [en]

The thermal conductivity of Compacted Graphite Iron (CGI) and spheroidal graphite iron (SGI) was established in the temperature range from room temperature up to 500 °C using the experimental thermal diffusivity, density and specific heat values. The influence of nodularity, graphite amount, silicon content and temperature on the thermal conductivity of fully ferritic high-silicon cast irons was investigated. It was found that the CGI materials showed higher thermal conductivity than the SGI materials. The thermal conductivity tended to increase with increasing temperature until it reached a maximum followed by a subsequent decrease as temperature was increased up to 500 °C. Conventional models were applied to estimate thermal conductivity and the predictive accuracy of each model was evaluated. The thermal conductivity could be estimated by the Helsing model. The Maxwell model, Bruggeman model and Hashin–Shtrikman model were also in fair agreement using the thermal conductivity value of graphite parallel to the basal planes in graphite. 

Place, publisher, year, edition, pages
Maney Publishing, 2017. p. 1-9
Keywords [en]
cast iron, high-silicon, modelling, Thermal conductivity, Ferritic steel, Graphite, Iron, Models, Silicon, Specific heat, Compacted graphite iron, Conventional models, Increasing temperatures, Predictive accuracy, Silicon cast iron, Silicon contents, Spheroidal graphite, Temperature range
National Category
Metallurgy and Metallic Materials
Identifiers
URN: urn:nbn:se:hj:diva-38338DOI: 10.1080/13640461.2017.1379263Scopus ID: 2-s2.0-85029576971OAI: oai:DiVA.org:hj-38338DiVA, id: diva2:1170694
Available from: 2018-01-04 Created: 2018-01-04 Last updated: 2018-01-04

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Matsushita, TaishiElmquist, LennartJarfors, Anders E.W.

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JTH. Research area Materials and manufacturing – CastingJTH, Materials and Manufacturing
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Metallurgy and Metallic Materials

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