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Computer simulation of cooling curves for solidification
KTH, Superseded Departments, Materials Science and Engineering.
KTH, Superseded Departments, Materials Science and Engineering.
2000 (English)In: Materials transactions, JIM, ISSN 0916-1821, Vol. 41, no 8, 1098-1103 p.Article in journal (Refereed) Published
Abstract [en]

The method of simulating cooling curves for solidifying alloys is examined. Usually, a simulation program only results in a curve showing the fraction solidified material as a function of temperature. In order to predict the cooling curve, i.e. temperature as a function of time, it is necessary to use a simulation program that also evaluates the changes of enthalpy during solidification and takes into account the possible variation of the rate of heat extraction with temperature or with a temperature difference between a crucible and a furnace. By comparing predicted cooling curves obtained in that way with experiments it was investigated how to take into account the heat capacity of the crucible. Two simulation programs were used; one based on the Gulliver-Scheil approximations and the other taking back diffusion into account, using a finite difference technique. In both cases the enthalpy was evaluated continuously during cooling.

Place, publisher, year, edition, pages
2000. Vol. 41, no 8, 1098-1103 p.
Keyword [en]
solidification, segregation, simulation, cooling curve, enthalpy, back, diffusion, diffusion, aluminium
URN: urn:nbn:se:kth:diva-20100ISI: 000089837400040OAI: diva2:338793
QC 20100525Available from: 2010-08-10 Created: 2010-08-10Bibliographically approved

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