Hot deformation behavior and dynamic recrystallization law of GH2150 alloy

doi:10.13251/j.issn.0254-6051.2023.06.030

Abstract

Abstract: Hot deformation behavior and dynamic recrystallization evolution of GH2150 alloy under different test parameters were studied by hot compression test with Gleeble-3800 thermal simulation machine. The results show that in the range of 1000-1200 ℃, when the strain rate is 0.1-5 s^-1 and the deformation amount is 30%, 50% and 70%, respectively, the peak stress of the alloy decreases with the increase of deformation temperature and decrease of strain rate. Combined with the true stress-true strain curves and Arrhenius formula, the hot deformation constitutive equation of the GH2150 alloy is obtained. The average relative error between the calculated and the actual results is 4.36%, and the correlation coefficient is R=0.992, showing in good agreement. It is found by drawing dynamic recrystallization diagram that large deformation is beneficial to increase the recrystallization fraction of the GH2150 alloy. The dynamic recrystallization behavior is mainly affected by deformation temperature at 50% deformation, and low strain rate at 70% deformation is more beneficial to the recrystallization.

Key words: GH2150 alloy, hot deformation, dynamic recrystallization, stress, strain

CLC Number:

TG156.1

Lou Haonan, Liu Jiaao, Mei Feiqiang, Cao Yichao, Song Xiyu, Zhang Weihong. Hot deformation behavior and dynamic recrystallization law of GH2150 alloy[J]. Heat Treatment of Metals, 2023, 48(6): 167-172.

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