Read more
In this work, a microstructural evaluation of the influence of thermal cycling was carried out on three API5L X80 grade steels: Nb-Cr, Nb-Cr-Mo and Nb-Cr-Mo-V manufactured in Brazil. These steels were manufactured using a controlled thermo-mechanical process without undergoing a subsequent accelerated cooling stage. Microstructural characterisations were carried out under two conditions, post-rolling and austenitising at 900oC followed by three (3) thermal cycles: cooling in air (1.5oC/s), in oil (30oC/s) and in water (115oC/s). Data such as TG, phase distribution: ferrite, bainite and AM, hardness and micro-hardness were analysed, as well as checking for differences in their substructures: subgrains, cells and fine precipitation.
About the author
Adriana de A.H. Vieira hat einen Abschluss in Metallurgietechnik von der Bundesuniversität Rio de Janeiro und einen Master in Werkstofftechnik und chemischen und metallurgischen Prozessen von der Päpstlichen Katholischen Universität Rio de Janeiro (2007). Er hat Erfahrung in physikalischer und mechanischer Metallurgie, Fehleranalyse, Schweißen und zerstörungsfreier Prüfung.
