Abstract
The tempering response of fully martensitic microstructures has been well characterized. However, bainitic microstructures may also be found in quenched industrial materials and the present study investigates the tempering response of fully martensitic and fully bainitic microstructures. Specific thermal cycles were developed to generate both microstructures in a boron added 0.17 wt pct carbon steel. The tempering response was assessed through dilatometry and microstructural characterization was conducted using scanning electron microscopy and Mössbauer spectroscopy. The dilatometric analysis of the tempering response of the martensitic microstructures provided information about retained austenite decomposition and cementite precipitation whereas bainitic microstructures showed a less sensitive dilatometric response during tempering likely due to the low amount of carbon in solution and absence of retained austenite as measured by Mössbauer spectroscopy.
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Acknowledgements
The support of the sponsors of the Advanced Steel Processing and Products Research Center, an industry-university cooperative research center at the Colorado School of Mines, and the Roberto Rocca Education Program is gratefully acknowledged. Tata Steel is also gratefully acknowledged for providing the material.
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© 2017 The Minerals, Metals & Materials Society
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Vieira, I., De Moor, E. (2017). Tempering Response of Bainitic and Martensitic Microstructures. In: Meyers, M., et al. Proceedings of the 3rd Pan American Materials Congress. The Minerals, Metals & Materials Series. Springer, Cham. https://doi.org/10.1007/978-3-319-52132-9_78
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DOI: https://doi.org/10.1007/978-3-319-52132-9_78
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