SIMULATION OF MICROSTRUCTURE AND PROPERTIES EVOLUTION OF MICRO ALLOYED STEEL DURING HOT DEFORMATION BY CELLULAR AUTOMATON
ZHI Ying1), LIU Xianghua1), YU Hailiang2), WANG Zhenfan1)
1) State Key Laboratory of Rolling and Automation, Northeastern University, Shenyang 110819
2) School of Mechanical, Materials and Mechatronic Engineering, University of Wollongong, Wollongong, NSW 2522, Australia
Cite this article:
ZHI Ying LIU Xianghua YU Hailiang WANG Zhenfan. SIMULATION OF MICROSTRUCTURE AND PROPERTIES EVOLUTION OF MICRO ALLOYED STEEL DURING HOT DEFORMATION BY CELLULAR AUTOMATON. Acta Metall Sin, 2011, 47(11): 1396-1402.
Abstract A model for prediction of the dynamic recrystallization microstructure and properties evolution of hot deformed austenite for micro alloyed steel by cellular automaton (CA) was developed. The theoretical modeling of dynamic recrystallization was on the basis of dislocation density, and the nucleation and grain growth of dynamic recrystallization were considered. The microstructure evolution of austenite dynamic recrystallization, such as the grain shape, grain size and volume fraction, was predicted quantitatively and visually described. Moreover the distribution and variation of the dislocation density and flow tress were obtained. Meanwhile, the microstructure and variation of the flow tress of micro alloyed< steel during hot deformation were measured by experiments. The measured results were in good agreement with the CA calculation results.
Supported by National Natural Science Foundation of China (Nos.51174249, 50974039 and 51034009), National Basic Research Program of China (No.2011CB606306-2) and Specialized Research Fund for the Doctoral Program of Higher Education (No.20090042120005)