Refinement of grain boundary cementite in hypereutectoid steels by thermomechanical processing By Chulmin M. Bae, Abdelbaset M. Elwazri, Duk-Lak Lee, and Stephen Yue
Grain boundary cementite, hypereutectoid steel
The grain boundary cementite in a hypereutectoid steel was considered to cause the brittle fracture. In this study, the effects of deformation temperature and cooling rate on the microstructure and mechanical properties of the hypereutectoid steels with different carbon content have been examined in order to control the grain boundary cementite precipitation. It was found that deformation at a temperature of 1050 °C with high cooling rate can significantly decrease the formation of grain boundary cementite. It was also found that the strength increases with increasing deformation temperatures and cooling rate.
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