Microstructure transformations in a press hardening steel during tailored thermo‐mechanical processing

H. Westermann, A. Reitz, R. Mahnken, M. Schaper, O. Grydin, Steel Research International (2021).

Journal Article | Published | English
Abstract
Microstructure transformation due to thermo-mechanical processing have an acute effect the macroscopic properties of low carbon steels. This effect includes visco-plastic deformation and phase transformations. Hot forming processes such as press hardening are particularly affected. Most engineering applications require a combination of high strength and sufficient residual ductility, which can be achieved by the development of graded microstructures. In the present work, the evolution of phase transformations is investigated by linking experiments and simulations to produce graded microstructures. For this purpose, an extended material model is proposed to represent the evolution of phase transformations under inhomogeneous heating and cooling strategies. On the experimental side, phase transformations are identified during thermo-mechanical treatment of flat steel specimens using digital image correlation and thermal imaging. Based on the experimental results, the material parameters are identified, and the simulation model is validated. On the numerical side an algorithm for the finite-element simulation of phase transformations in low carbon steels is proposed. The evolution of phase transformations is presented for the simulation of tensile specimen employing the finite-element-method.
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steel research international
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Westermann H, Reitz A, Mahnken R, Schaper M, Grydin O. Microstructure transformations in a press hardening steel during tailored thermo‐mechanical processing. steel research international. Published online 2021. doi:10.1002/srin.202100346
Westermann, H., Reitz, A., Mahnken, R., Schaper, M., & Grydin, O. (2021). Microstructure transformations in a press hardening steel during tailored thermo‐mechanical processing. Steel Research International. https://doi.org/10.1002/srin.202100346
@article{Westermann_Reitz_Mahnken_Schaper_Grydin_2021, title={Microstructure transformations in a press hardening steel during tailored thermo‐mechanical processing}, DOI={10.1002/srin.202100346}, journal={steel research international}, publisher={Wiley}, author={Westermann, Hendrik and Reitz, Alexander and Mahnken, Rolf and Schaper, Mirko and Grydin, Olexandr}, year={2021} }
Westermann, Hendrik, Alexander Reitz, Rolf Mahnken, Mirko Schaper, and Olexandr Grydin. “Microstructure Transformations in a Press Hardening Steel during Tailored Thermo‐mechanical Processing.” Steel Research International, 2021. https://doi.org/10.1002/srin.202100346.
H. Westermann, A. Reitz, R. Mahnken, M. Schaper, and O. Grydin, “Microstructure transformations in a press hardening steel during tailored thermo‐mechanical processing,” steel research international, 2021, doi: 10.1002/srin.202100346.
Westermann, Hendrik, et al. “Microstructure Transformations in a Press Hardening Steel during Tailored Thermo‐mechanical Processing.” Steel Research International, Wiley, 2021, doi:10.1002/srin.202100346.
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