Measurements and modelling of air gap formation in Cu-based alloys
2005 (English)In: International Journal of Cast Metals Research, ISSN 1364-0461, Vol. 18, no 1, 21-28 p.Article in journal (Refereed) Published
The formation of an air gap has been experimentally studied during solidification of pure Cu, Cu-Te and Cu-6%Sn in a cylindrical mould. The displacements of the casting and the mould causing an air gap have been measured during solidification and cooling of the casting. The temperature distribution was measured simultaneously. Mathematical modelling has been performed to increase the understanding of the solidification process and the shrinkage of the casting leading to air gap formation. A model, which has been tested in earlier work showing good results for aluminium based alloys, has been applied here to describe air gap formation during solidification of copper based alloys. The model includes the effect of the formation and condensation of vacancies on the solidification process as well as on the material shrinkage resulting in air gap formation. The results from the modelling show a reasonable agreement with the experimental measurements.
Place, publisher, year, edition, pages
2005. Vol. 18, no 1, 21-28 p.
air gap, shrinkage, solidification, casting, heat transfer coefficient, Cu-base alloy, vacancy condensation, heat-transfer, si alloy, al-si, solidification
IdentifiersURN: urn:nbn:se:kth:diva-14624DOI: 10.1179/136404605225022802ISI: 000227828600003ScopusID: 2-s2.0-27444437894OAI: oai:DiVA.org:kth-14624DiVA: diva2:332665
QC 201005252010-08-052010-08-05Bibliographically approved