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Measurements and modelling of air gap formation in aluminium based alloys
KTH, School of Industrial Engineering and Management (ITM), Materials Science and Engineering, Materials Processing.
2005 (English)In: International Journal of Cast Metals Research, ISSN 1364-0461, E-ISSN 1743-1336, Vol. 18, no 1, 29-40 p.Article in journal (Refereed) Published
Abstract [en]

The formation of an air gap has been experimentally studied during solidification of several aluminium based alloys. Air gap widths and temperature distribution have been measured during solidification in a cylindrical mould. The effect of grain refinement on heat transfer and air gap formation has been studied. Mathematical modelling has been performed to increase the understanding of the solidification process and air gap formation. A model was developed for description of air gap formation in alloys solidifying with varying solidification intervals. The model includes the effect of formation and condensation of lattice defects on the solidification process and air gap formation. The calculated shrinkage using this model shows good agreement with the experimental data.

Place, publisher, year, edition, pages
2005. Vol. 18, no 1, 29-40 p.
Keyword [en]
air gap, shrinkage, casting, solidification, vacancy condensation, heat-transfer, si alloy, al-si, solidification, mold, coefficient, interface, vacancies
Identifiers
URN: urn:nbn:se:kth:diva-14625DOI: 10.1179/136404605225022793ISI: 000227828600004Scopus ID: 2-s2.0-27444446924OAI: oai:DiVA.org:kth-14625DiVA: diva2:332666
Note
QC 20100525Available from: 2010-08-05 Created: 2010-08-05 Last updated: 2017-12-12Bibliographically approved

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