Construction of constitutive model for GH4169 alloy under high temperature and high strain rate

ZHANG Jilin; TANG Linhu; MA Furong; LI Zhonglin; HA Jinfu

doi:10.7513/j.issn.1004-7638.2025.03.022

Volume 46 Issue 3

Jun. 2025

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Article Navigation > IRON STEEL VANADIUM TITANIUM > 2025 > 46(3): 157-166

ZHANG Jilin, TANG Linhu, MA Furong, LI Zhonglin, HA Jinfu. Construction of constitutive model for GH4169 alloy under high temperature and high strain rate[J]. IRON STEEL VANADIUM TITANIUM, 2025, 46(3): 157-166. doi: 10.7513/j.issn.1004-7638.2025.03.022

Citation:

ZHANG Jilin, TANG Linhu, MA Furong, LI Zhonglin, HA Jinfu. Construction of constitutive model for GH4169 alloy under high temperature and high strain rate[J]. IRON STEEL VANADIUM TITANIUM, 2025, 46(3): 157-166. doi: 10.7513/j.issn.1004-7638.2025.03.022

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Construction of constitutive model for GH4169 alloy under high temperature and high strain rate

doi: 10.7513/j.issn.1004-7638.2025.03.022

1.
Lanzhou Institute of Technology, Gansu Province Precision Machining Technology and Equipment Engineering Research Center, Gansu Province Key Laboratory of Green Machining Technology and Its Application, Lanzhou 730050, Gansu, China
2.
Lanzhou Wanli Aviation Electromechanical Co., Ltd., Lanzhou 730050, Gansu, China
3.
Lanzhou Foster Machinery Equipment Co., Ltd., Lanzhou 730050, Gansu, China

Received Date: 2024-06-10
Publish Date: 2025-06-30

Abstract

Abstract

The quasi-static compression test and dynamic impact test of GH4169 alloy were carried out by universal testing machine (UTM5305) and Hopkinson dynamic testing device (ALT 1000), respectively. The quasi-static test data of strain rates of 0.001, 0.003 and 0.1 s^–1 at room temperature were obtained. The Johnson-Cook (JC) constitutive model and its modified model were constructed from the dynamic test data at temperatures of 25, 600, 750, 900 ℃ and strain rates of 1500, 2500, 3500, 4500 s^–1. The result shows that the plastic hardening, thermal softening and rate sensitivity of the material happen, especially when the temperature rises to 900 degrees Celsius, the softening effect is particularly prominent. The correlation coefficient (r) of the original JC constitutive equation is 0.9147, the coefficient of determination (R²) is 0.7422, and the average relative error (AARE) is 14.53%. The revised JC constitutive equation correlation coefficient (r) is increased to 0.9444, and the coefficient of determination (R²) is increased to 0.8867. The average relative error (AARE) is reduced to 10.77%, which significantly improves the prediction accuracy and reliability compared with the original JC constitutive model, and can be used to predicate the stress-strain behavior of materials.
- GH4169 alloy,
- modified constitutive model,
- high temperature,
- high strain rate,
- prediction accuracy

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References

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