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Annealing behavior in a high-pressure torsion-processed Fe–9Cr steel

  • Metals & corrosion
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Abstract

A Fe–9Cr steel containing second-phase particles was processed by ten rotations of high-pressure torsion (HPT) to produce a microstructure consisting of pancake-shaped nanoscaled grains with dominantly high-angle boundaries. Annealing was carried out on the HPT-processed Fe–9Cr steel from 500 to 700 °C up to 48 h. During the annealing, grains grew in a continuous manner. During high-temperature annealing (above 600 °C), a higher fraction of low-angle boundaries was observed when texture J became the dominant texture component. The annealing behavior of the HPT-processed Fe–9Cr steel was compared to that of the equal-channel angular pressing (ECAP)-processed Fe–9Cr steel. It was found ECAP Fe–9Cr showed a different grain growth mode, i.e., discontinuous growth, and a higher degree of thermal stability. Our studies provide insights into how the annealing behavior is affected by the microstructure and texture evolution.

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Data availability statement

The raw/processed data required to reproduce these findings cannot be shared at this time as the data also forms part of an ongoing study.

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Acknowledgements

This research is financially supported by US Department of Energy, Office of Nuclear Energy, through the NEET-NSUF (Nuclear Energy Enabling Technology-Nuclear Science User Facility) program (Award Number DE-NE0008524). R. Islamgaliev is grateful to the RSF Project No 19-19-00496. R. Valiev gratefully acknowledges the financial support from Saint Petersburg State University in the framework of Call 3 Project (ID 26130576). The electron microscopy was supported partially by the University of Missouri Electron Microscopy Core “Excellence in Electron Microscopy” award and partially by the Materials Research Center at Missouri University of Science and Technology.

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Authors and Affiliations

  1. Department of Materials Science and Engineering, Missouri University of Science and Technology, Rolla, MO, 65409, USA

    Jiaqi Duan, Haiming Wen & Caizhi Zhou

  2. Department of Ming and Nuclear Engineering, Missouri University of Science and Technology, Rolla, MO, 65409, USA

    Haiming Wen

  3. Electron Microscopy Core Facilities, University of Missouri, Columbia, MO, 65211, USA

    Xiaoqing He

  4. Department of Mechanical and Aerospace Engineering, University of Missouri, Columbia, MO, 65211, USA

    Xiaoqing He

  5. Institute of Physics of Advanced Materials, Ufa State Aviation Technical University, Ufa, Russia, 450008

    Rinat Islamgaliev & Ruslan Valiev

  6. Saint Petersburg State University, Universitetskiy Prospekt 28, Peterhof, St. Petersburg, Russia, 198504

    Ruslan Valiev

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  1. Jiaqi Duan
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Correspondence to Haiming Wen.

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Duan, J., Wen, H., Zhou, C. et al. Annealing behavior in a high-pressure torsion-processed Fe–9Cr steel. J Mater Sci 55, 7958–7968 (2020). https://doi.org/10.1007/s10853-020-04560-3

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