EFFECT OF WELDING ON THE FRACTURE BEHAVIOUR OF THE FERRITIC CORROSION-RESISTANT STEEL

• Main Authors: Eva Schmidová, Petr Hanus
• Format: Article
• Language: English
• Published: Univerzity of Zilina. Faculty of Mechanical Engineering 2011-08-01
• Series: Materiálové Inžinierstvo
• Subjects: Fracture; Precipitaion; Carbides; Ferritic steel
• Online Access: http://fstroj.uniza.sk/journal-mi/PDF/2011/14-2011.pdf

Structural instability of the ferritic corrosion-resistant steel typically results in the carbides precipitation on the coarsened grain boundaries and in the associated intercrystalline corrosion. The examined steel revealed a tendency towards a defective fracture behaviour associated with the different carbide phase distribution. In the case of a preferential distribution within the grain interior, the relaxation processes along the welding line are limited and the transgranular cleavage fracture mechanism plays a role. Intergranular distribution of secondary phases brought tendency towards intergranular decohesion.