Crystallization and Ripening Phenomena in Semi-Solid Steels

Abstract:

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Rheological properties, crystallization and ripening phenomena have been investigated for three different steel grades in the semi-solid state. For each steel grade detailed investigation has been performed via differential scanning calorimetry to quantify the solid fraction as a function of temperature. The experimental procedure for all samples has been as follows: the completely liquid samples were cooled with a constant rate under constant shearing to temperatures corresponding to solid fractions of 30 and 40%. Tracking the viscosity during this procedure allowed analyzing the crystallization kinetics and final ripening process, which differ for the different steel grades. Evaluating the viscosity data on the base of a combination of convection dominated ripening model and a modified Krieger-Dougherty equation gives valuable information of the microstructural evolution. This is validated by additionally quenching samples.

Info:

Periodical:

Solid State Phenomena (Volume 256)

Edited by:

Ahmed Rassili

Pages:

25-30

DOI:

10.4028/www.scientific.net/SSP.256.25

Citation:

M. Modigell et al., "Crystallization and Ripening Phenomena in Semi-Solid Steels", Solid State Phenomena, Vol. 256, pp. 25-30, 2016

Online since:

September 2016

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Price:

$35.00

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