MECHANISMS OF INTERGRAINAL FAILURE DURING PLASTIC DEFORMATION

The article investigates fracture occurring during plastic deformation. It is noted that the fracture begins in two ways – due to the formation of wedge-shaped (V-shaped) cracks, which usually form at the intersection points of three grain boundaries and tend to grow along the boundaries perpendicular to the direction of the applied stress. Such V-shaped cracks can be observed in many pure metals as well as in engineering alloys such as nickel alloys and stainless steels.