The complex interplay between the rapid martensitic transformation and the plastic relaxation during martensitic transformation in low-carbon steel is investigated using a combined phase-field and phenomenological cry...The complex interplay between the rapid martensitic transformation and the plastic relaxation during martensitic transformation in low-carbon steel is investigated using a combined phase-field and phenomenological crystal plasticity approach.The large transformation-induced deformations and local lattice rotations are rigorously described within the finite strain framework.The study reveals that plastic relaxation plays a crucial role in accommodating the transformation-induced deformations of martensite in the parent austenite phase.By systematically varying the plastic slip rate,imposed cooling rate,and carbon content,the simulations provide insights into the interdependence between these factors,contributing to a better understanding of the martensitic transformation process and the resulting microstructures.The phenomenological crystal plasticity model effectively relates the plastic relaxation rate to the rate of martensitic transformation with a significant time scale difference between the two processes.The findings contribute to a deeper understanding of the interplay between the rapid martensitic transformation and the requirement for plastic deformation.展开更多
基金funding by the Deutsche Forschungsgemeinschaft(DFG,German Research Foundation)-grant SH 657/3-1.
文摘The complex interplay between the rapid martensitic transformation and the plastic relaxation during martensitic transformation in low-carbon steel is investigated using a combined phase-field and phenomenological crystal plasticity approach.The large transformation-induced deformations and local lattice rotations are rigorously described within the finite strain framework.The study reveals that plastic relaxation plays a crucial role in accommodating the transformation-induced deformations of martensite in the parent austenite phase.By systematically varying the plastic slip rate,imposed cooling rate,and carbon content,the simulations provide insights into the interdependence between these factors,contributing to a better understanding of the martensitic transformation process and the resulting microstructures.The phenomenological crystal plasticity model effectively relates the plastic relaxation rate to the rate of martensitic transformation with a significant time scale difference between the two processes.The findings contribute to a deeper understanding of the interplay between the rapid martensitic transformation and the requirement for plastic deformation.
