| Abstract |
| Recently, the finite element analysis has been coupled with recrystallization modeling equations in the prediction of recrystallization behavior during forming processes at elevated temperatures. In this study, a forging process, converting a cylindrical billet into a gear blank through buster, blocker and finisher operations was analyzed by a rigid thermoviscoplastic finite element method. The Sellars equation was applied to the thermo-mechanical histories obtained from the analysis to predict the recrystallization behavior occurring during the forging process. As a result, it was found that the dynamic recrystallization would occur 3-4 times, 1-2 times and none in the buster, blocker and finisher operations, respectively, and that the static and metadynamic recrystallizations would occur between operations. It was also found that austenite grain sizes measured at several moments during the forging process were in good agreement with predicted ones. |
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| Key Words |
| Finite element method, Sellars equation, Recrystallization, Hot forging, Austenite grain |
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