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Determination of pressure in the extradendritic liquid area during solidification
Jönköping University, School of Engineering, JTH, Materials and Manufacturing.ORCID iD: 0000-0001-7012-9342
Jönköping University, School of Engineering, JTH, Materials and Manufacturing.ORCID iD: 0000-0002-3024-9005
Department of Material Science and Technology, School of Industrial Engineering and Management, Royal Institute of Technology, Stockholm, Sweden.
Ohio State University, Department of Materials Science and Engineering, Columbus, United States.
2018 (English)In: Journal of thermal analysis and calorimetry (Print), ISSN 1388-6150, E-ISSN 1588-2926, Vol. 132, no 3, p. 1661-1667Article in journal (Refereed) Published
Abstract [en]

Complex-shaped lamellar graphite iron castings are susceptible to casting defects related to the volume change during solidification. The formations of these recurring defects are caused by the flow of the liquid in the intradendritic area, between the austenite dendrite arms, and in the extradendritic area between the austenite grains. The conditions for the liquid flow, in turn, are determined by the solidification behavior. The present study suggests a new measurement method and a novel calculation algorithm to determine the pressure of the extradendritic liquid during solidification. The method involves a spherical sample suspended in a measurement device, where the temperature and the volume changes are measured during solidification. The calculation algorithm is based on the numerical interpretation of the Clausius-Clapeyron equation where the temperature variation, the volume change and the released latent heat are processed to determine the local pressure of the extradendritic liquid area during solidification.

Place, publisher, year, edition, pages
Springer, 2018. Vol. 132, no 3, p. 1661-1667
Keywords [en]
Volume change measurement; Fourier thermal analysis; Clausius-Clapeyron equation; Extradendritic liquid pressure; Lamellar graphite iron
National Category
Metallurgy and Metallic Materials
Identifiers
URN: urn:nbn:se:hj:diva-41094DOI: 10.1007/s10973-018-7088-zISI: 000432215600022Scopus ID: 2-s2.0-85042940249Local ID: JTHMaterialISOAI: oai:DiVA.org:hj-41094DiVA, id: diva2:1236611
Available from: 2018-08-03 Created: 2018-08-03 Last updated: 2019-03-05Bibliographically approved

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Svidró, PéterDiószegi, Attila

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