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张兵,岳磊,陈韩峰,张志娟,刘鹏茹,赵芬芬.铸态GH4169合金热变形行为及三种本构模型对比[J].稀有金属材料与工程(英文),2021,50(1):212~222.[Zhang Bing,Yue lei,Chen Hanfeng,Zhang Zhijuan,Liu Pengru and Zhao Fenfen.Hot deformation behavior of as-cast GH4169 alloy and comparison of three constitutive models[J].Rare Metal Materials and Engineering,2021,50(1):212~222.]
Hot deformation behavior of as-cast GH4169 alloy and comparison of three constitutive models
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Received:February 14, 2020  
DOI:
Key words: As-cast GH4169  hot deformation behavior  constitutive model
Foundation item:国家自然科学基金资助(项目号51874226);镍钴资源综合利用国家重点实验室开放课题(301170504)
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Zhang Bing,Yue lei,Chen Hanfeng,Zhang Zhijuan,Liu Pengru and Zhao Fenfen  
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Abstract:
      In this paper, the thermal compression test of as-cast GH4169 alloy is performed on a Gleeble-1500 thermo-mechanical simulator. The deformation parameters are: temperature (1193~1373 K), strain rate (0.01~10 s-1), and deformation 50%. By analyzing the true stress and true strain curve, the hot deformation behavior of as-cast GH4169 alloy was studied; the correlation coefficients (R) and average relative errors (AARE) of the three constitutive models of Johnson-Cook (JC), modified Johnson-Cook (MJC) and strain-compensated Arrhenius model are compared and analyzed. The results show that the flow stress of as-cast GH4169 alloy decreases with the increase of deformation temperature and the decrease of strain rate. The correlation coefficients (R) of the JC model, MJC model and strain-compensated Arrhenius constitutive model were 0.891, 0.956, and 0.961, and the average relative errors (AARE) were 29.02%, 11.16%, and 9.31%, respectively. Therefore, the strain-compensated Arrhenius model can describe the thermal deformation behavior of as-cast GH4169 more accurately.