Abstract
The thermal-mechanical properties of WHT1300HF high strength steel were tested by isothermal uniaxial tensile method at various strain rates (0.05, 0.2, 0.5 and 1 s−1) and temperatures (700, 750, 800 and 850 °C) and analyzed by constitutive equations. The results show that increasing deformation temperature leads to significant reduction in the level of flow stress and work hardening exponent of the steel; however, increasing strain rate results in noticeable increase in the stress level and work hardening. Arrhenius-type constitutive equations were used to describe the flow behavior of the steel at elevated temperatures. With the constants of n, α, lnA and Q determined by the approximation method, the relative error between the calculated and tested flow stresses is smaller than 5.15 %, suggesting a high level of confidence in the developed constitutive equations.
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Acknowledgement
This research was financially supported by the Ministry of Science and Technology of China under the auspice of the National “973” program (2010CB630802).
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Liu, K., Chi, B., Zhang, Y., Li, J. (2016). Constitutive Analysis on Thermal-Mechanical Properties of WHT1300HF High Strength Steel. In: Proceedings of SAE-China Congress 2015: Selected Papers. Lecture Notes in Electrical Engineering, vol 364. Springer, Singapore. https://doi.org/10.1007/978-981-287-978-3_28
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DOI: https://doi.org/10.1007/978-981-287-978-3_28
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