Suppression of strain-induced precipitation of NbC by epitaxial growth of NbC on pre-existing TiN in Nb-Ti microalloyed steel

Absence of strain-induced precipitation of NbC is observed in a conventional hot rolled Nb-Ti microalloyed X90 strip. Quantitative analysis using transmission electron microscopy and 3D atom probe tomography indicates that epitaxial growth of NbC on pre-existing TiN particles with a short inter-particle spacing of 300±65nm suppresses the occurrence of strain-induced precipitation of NbC on dislocations. The model for predicting kinetics of …