High temperature constitutive model and dynamic recrystallization model of IN690 alloy

doi:10.13251/j.issn.0254-6051.2021.08.002

Abstract

Abstract: During hot working process of the IN690 alloy, some complex metallurgical phenomena (including: work hardening (WH), dynamic recovery (DRV) and dynamic recrystallization (DRX), etc.) are emerged. In order to study these phenomena, the high temperature constitutive equation and DRX mode of the IN690 alloy through hot compression test were created, and the DRX mechanism of the alloy was discussed. In addition, the DRX process of the alloy was simulated by using finite element software (Deform-3D). The experimental results show that the dynamic recrystallization volume fraction (X_DRX) of the IN690 alloy increases with the increase of deformation temperature or the decrease of strain rate for a given strain.

Key words: IN690 alloy, high temperature constitutive model, dynamic recrystallization model, numerical simulation

CLC Number:

TG132.3

Li Dongsheng, Zhao Enxu, Wang Wei, Tan Li, Zhang Junpeng, Tian Zhenyu. High temperature constitutive model and dynamic recrystallization model of IN690 alloy[J]. Heat Treatment of Metals, 2021, 46(8): 8-14.

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