DIRECTIONAL SOLIDIFICATION OF COMMERCIAL BRASS

ARES, ALICIA;; CARAM, RUBENS;; RIOS, CARLOS; SCHVEZOV, CARLOS

The Extraction & Processing Division and Fundamentals of Advanced Materials for Energy Conversion

Mark E. Schlesinger, editor. A publication of the Minerals, Metals, & Materials Society.

Lugar: Charlotte, North Carolina. USA.; Año: 2004; p. 739 - 750

The columnar-to-equiaxed transition (CET) was observed in brass samples directionally solidified from the chill zone in different solidification conditions.  The transition occurs when the gradient in the liquid ahead of the columnar dendrites reaches values between -2.23 °C/cm and 1.05 °C/cm and the growth velocities reach values between 0.13 cm/s and 0.34 cm/s.  The microstructure obtained is analyzed taking into account the characteristics of the alloy and the temperature profiles at the solidification interface.  The variation of the primary and secondary dendritic spacings along the length of the sample is analyzed and the values experimentally measured are compared with results predicted by different theoretical models.