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Micromechanical modeling of cleavage fracture over grain boundary

Stec M., Faleskog J.

Zeszyty Naukowe. Mechanika / Politechnika Opolska

2005

z. 82

203-209

Cleavage fracture in ferritic steels is often initiated by the cracking of a brittle carbide which generates a rapidly propagating micro-crack. If the micro-crack is not arrested by the surrounding ferrite, failure of the component may occur. Examinations show that the arrest of the crack occurs frequently at the grain boundary of ferrite grains. The influence of the grain boundary as an arrest mechanism for cleavage crack is examined. The separation of the crack faces is described using cohesive zone model.