Observations on the fracture of cementite particles in a spheroidized 1.05% c steel deformed at room temperature

The initiation of fracture in the microstructure at room temperature was observed in tension, compression and torsion. Cracks are formed in the carbide particles in a direction normal to the tensile strain imposed upon the particles by the deforming matrix. Criteria of fracture based on fiber loading and dislocation mechanisms relate the particle fracture strength to the influence of shape and orientation of the particles and mean free slip...