Paper Title:
Crystallization and Ripening Phenomena in Semi-Solid Steels
  Abstract

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)
Chapter
Chapter 2: Materials Development and Characterization
Edited by
Ahmed Rassili
Pages
25-30
DOI
10.4028/www.scientific.net/SSP.256.25
Citation
M. Modigell, A. Pola, T. Volkmann, C. Zang, "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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