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Microstructure analysis on IN 718 alloy round rod by FEM in the hot continuous rolling process

2013; Elsevier BV; Volume: 37; Issue: 20-21 Linguagem: Inglês

10.1016/j.apm.2013.04.005

1872-8480

Fengli Sui, Yue Zuo, Liu Xiang-hua, Liqing Chen,

Microstructure and mechanical properties

Based on physical metallurgy rules and experiential equations, models for microstructure analysis on IN 718 alloy in the round rod hot continuous rolling process has been developed using the finite element method (FEM) on the software ANSYS/LS-DYNA. The dynamic and metadynamic recrystallization models in and after deformation, the grain growth models in the compensated reheating process for IN 718 alloy are regressed, and corresponding processes are involved in these models. For a real rolling practice, the calculated central grain sizes were examined and are in good agreement with the measured ones. The element in the center of the workpiece is a typical one possessing the maximum of the effective strain, the temperature and the grain size in the rolling process. In the hot continuous rolling process, the relationship between the final grain size of the typical element and the inlet velocity of the first stand has been regressed by FE analysis, and the lower rolling speed is beneficial to the grain refinement.