Transactions of Materials and Heat Treatment

Title：New progress on modeling methods of microstructure evolution in hot forging process of metallic materials

Authors： Chen Fei Zhu Huajia Li Jiahang Cui Zhenshan

Unit：

KeyWords：

ClassificationCode：TG385

year,vol(issue):pagenumber：2021,46(9):16-21

Abstract：

The modeling and simulation methods of microstructural evolution in hot forging process of metal material were briefly described, and the integrated simulation method of macroscale finite element and mesoscale multi-level cellular automation (MCA) was introduced emphatically. This method took the dislocation density as a clue, and according to the macro-microscopic interaction laws between “strain/strain rate/temperature-dislocation density-recrystallization-flow stress”, the morphology, size and completion score of recrystallized grains under non-uniform/non-isothermal deformation conditions were tracked. Then, the crystal plasticity-multi-level cell coupling simulation method was introduced. This method took the actual grain orientation as the initial structure input, used crystal plasticity to describe the strain gradient of the internal deformation of the grain and mapped the dislocation density and grain orientation to multi-level cell model, which quantitatively described the formation of large grains in the texture. Finally the numerical simulation-physical simulation method of the microstructure evolution for the nuclear power large forging of stainless steel was introduced briefly, the advantages and disadvantages of several methods were summarized, and the future development trend was prospecte

Funds：

国家自然科学基金资助项目（51705316,U2037204）

陈飞（1982-），男，博士，特别研究员 E-mail：feichen@sjtu.edu.cn

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