Interphase Evolution and Defect Formation during Horizontally Directional Solidification Process of SnZn Alloys

ALICIA ARES; ALEX IVÁN KOCIUBCZYK; WILKY DESROSIN; LUCÍA MABEL BOYCHO; CARLOS ENRIQUE SCHVEZOV

Orlando

Simposio; Materials Processing Fundamentals: Casting, Solidification, and Steel Processing; 2015

TMS

In the present research, commercially pure Sn and Zn and SnZn alloys (Sn1wt.% Zn, Sn2wt.% Zn, Sn4wt.% Zn, Sn8wt.% Zn and Sn8.9wt.% Zn, weight percent) were obtained by horizontal directional solidification process with two opposite senses and heat extraction. The solidification process was realized using a horizontal furnace with two heat extraction systems at the ends, a measurement temperature system with eight Ktype thermocouples and an electronic recorder of temperature data. The resulting structures were analyzed using optical microscopy. From the solidification process the thermal and metallographic parameters were determined in all samples. The presence of defects in the solidified pieces was observed. Internal defects pretended to be dependent not only on the composition of the alloys under consideration but also with the size of the structures formed, also, from the velocities and accelerations of interphases, and from the variation of thermal gradients. A model of the phenomenon from fist principles is presented.