The Strain induced Cementite Dissolution in Carbon Steel -Experimental Facts and Theoretical Approach.

摘要

The evolution of microstructure and phase composition of the carbon steel UIC 860 during high pressure torsion in the wide strain range γ = 62 - 300 was investigated. Complete cementite dissolution was observed in steel after deformation γ = 300. It is suggested that the decrease of thermodynamic stability of the carbides is connected with the high stress levels inside the cementite particles caused by shear stresses at their surfaces.