Damage evaluation of ASTM A572 HSLA steel after a real fire exposition in service conditions

• DOI: 10.22533/at.ed.317332305016

• Palavras-chave: -

• Keywords: -

• Abstract:

  This metallurgical research determined the mechanical properties of steel ASTM A572 grade 60 that was subjected to fire incident. Mechanical properties were obtained by axial tension test and Rockwell hardness giving similar results than the typical ones observed in original material. A microstructural analysis was carried out obtaining micrographs using optical microscopy. The damaged steel was also analyzed by scanning electron microscopy to analyze the microstructure features after the fire exposition. These images were used to determine a percentage of phases employing the Image J free software. The results didn´t reveal damage at the bridge by fire because there is not microstructural damage due to the perlitic degradation or martensitic transformation as well as mechanical properties were not affected neither.