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Flow stress behavior and constitutive modeling of 20MnNiMo low carbon alloy

  • Materials, Metallurgy, Chemical and Environmental Engineering
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Abstract

The hot deformation behavior of 20MnNiMo low carbon alloy was investigated by isothermal compression tests over wide ranges of temperature (1223-1523 K) and strain rate (0.01-10 s-1). According to the experimental true stress-true strain data, the constitutive relationships were comparatively studied based on the Arrhenius-type model, Johnson-Cook (JC) model and artificial neural network (ANN), respectively. Furthermore, the predictability of the developed models was evaluated by calculating the correlation coefficient (R) and mean absolute relative error (AARE). The results indicate that the flow stress behavior of 20MnNiMo low carbon alloy is significantly influenced by the strain rate and deformation temperature. Compared with the Arrhenius-type model and Johnson-Cook (JC) model, the ANN model is more efficient and has much higher accuracy in describing the flow stress behavior during hot compressing deformation for 20MnNiMo low carbon alloy.

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Authors and Affiliations

  1. School of Materials Science and Engineering, Chongqing University, Chongqing, 400044, China

    Meng-han Wang  (王梦寒), Gen-tian Wang  (王根田) & Rui Wang  (王瑞)

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  1. Meng-han Wang  (王梦寒)
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  2. Gen-tian Wang  (王根田)
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  3. Rui Wang  (王瑞)
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Correspondence to Meng-han Wang  (王梦寒).

Additional information

Foundation item: Project(CDJZR14130006) supported by the Fundamental Research Funds for the Central Universities, China

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Wang, Mh., Wang, Gt. & Wang, R. Flow stress behavior and constitutive modeling of 20MnNiMo low carbon alloy. J. Cent. South Univ. 23, 1863–1872 (2016). https://doi.org/10.1007/s11771-016-3241-7

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  • DOI: https://doi.org/10.1007/s11771-016-3241-7

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