Study on dynamic mechanical properties and constitutive model of 022Cr18Ni14Mo2 stainless steel under impact load

Jia Haishen; Luo Wencui; Zhang Jilin; Yi Xiangbin

doi:10.7513/j.issn.1004-7638.2022.02.027

Volume 43 Issue 2

May 2022

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Jia Haishen, Luo Wencui, Zhang Jilin, Yi Xiangbin. Study on dynamic mechanical properties and constitutive model of 022Cr18Ni14Mo2 stainless steel under impact load[J]. IRON STEEL VANADIUM TITANIUM, 2022, 43(2): 178-185. doi: 10.7513/j.issn.1004-7638.2022.02.027

Citation:

Jia Haishen, Luo Wencui, Zhang Jilin, Yi Xiangbin. Study on dynamic mechanical properties and constitutive model of 022Cr18Ni14Mo2 stainless steel under impact load[J]. IRON STEEL VANADIUM TITANIUM, 2022, 43(2): 178-185. doi: 10.7513/j.issn.1004-7638.2022.02.027

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Study on dynamic mechanical properties and constitutive model of 022Cr18Ni14Mo2 stainless steel under impact load

doi: 10.7513/j.issn.1004-7638.2022.02.027

1.
Key Laboratory of Green Cutting Technology and Application in Gansu Province, Lanzhou Institute of Technology, Lanzhou 730050, Gansu, China
2.
Gansu Province Mechanical Equipment Advanced Manufacturing Collaborative Innovation Center, Lanzhou Institute of Technology, Lanzhou 730050, Gansu, China

Received Date: 2021-07-14
Available Online: 2022-05-11
Publish Date: 2022-04-28

Abstract

Abstract

The quasi-static and dynamic compression tests of 022Cr18Ni14Mo2 stainless steel were performed by using UTM5305 universal testing machine and split Hopkinson compression bar. The strain hardening characteristics and the dependence of flow stress on strain rate were discussed. The quantitative analysis was carried out by taking two parameters of strain hardening index and strain rate sensitivity coefficient into account. Based on the above analysis results, the traditional J-C constitutive model was revised and a new type of constitutive model was constructed. The parameters of the modified constitutive model are identified with the help of experimental data. The predicted values from the model are compared with the experimental values, and the correlation coefficient (R) and average relative error (AARE) of the constitutive model are used to evaluate it. The results show that the sample has obvious strain hardening characteristics and remarkable strain rate sensitivity. The strain hardening index is dominated by strain and strain rate, and the strain rate sensitivity coefficient increases with the increase of strain rate, and the increase amplitude decreases gradually. The correlation coefficient (R) and average relative error (AARE) of the modified constitutive model are 0.9896 and 3.29%, respectively, which can better describe the rheological behavior of specimens at high temperature and high strain rate.
- stainless steel,
- dynamic mechanical properties,
- strain hardening index,
- strain rate sensitivity coefficient,
- constitutive model

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References(25)

References

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