Micrograph results were obtained to the positions where the
thermocouples were placed to estimate the percentage of formed
phases during cooling with the aid of metallographic software.
This tool allowed to estimate the percentage of the phases present
in a micrograph with the aid of routines programmed into the software
and to quantify the area of metallographic mosaics based on
the color and morphology. It was used Nital 3% as metallographic
etching, according to ASTM: E 3-11. The sequence of this calculation
is shown in Fig. 4.