Microstructures of deformation and fracture of cementite in pearlitic carbon steels strained at various temperatures

Heat treatment analysis of multiphase steels through the use of a coupled phase field and finite element model methodology

“…For all nodes considered, the von Mises equivalent stress reaches higher values than the yield stress hence plasticity occurs for ferrite and cementite phases. It is known that cementite shows evidences of plastic deformation above 673 K [45], validating the obtained results. During microstructural evolution and phase transformation the strain component e 11 increases in absolute value for all nodes with the decreasing of temperature (see Fig.…”

On the origin of cementite diffraction peak broadening during tensile deformation at ambient temperatures

“…Further potential contributions to the peak broadening are a developing distribution of average strain betweens cementite particles (Wilson and Konnan, 1964) and inhomogeneous strain fields due to an increasing density of defects (e.g. dislocations) enabling plasticity in the particles (Maurer and Warrington, 1967;Sevillano, 1975;Inoue et al, 1976;Inoue et al, 1977). Most of the above mentioned experimental observations are reported for cold drawn or rolled pearlitic steel, where the material undergoes severe plastic deformation with applied macroscopic strains >100%.…”

The formation of pearlite in steels

“…The early work on the deformation of pearlite by maurer and Warrington (1967) postulated the existence of ½(111) partial dislocations in the cementite. The work of Inoue et al (1977) on deformation of pearlitic over a wide range of temperatures showed that at room temperature slip occurred in Fe 3 C on only (100) and (001), but at higher temperatures other slip planes were operative. Thus, as the cementite has limited slip modes, the associated deformation is complex and dislocations must be stored at the ferrite/cementite interfaces resulting in very high local elastic stresses.…”