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Hot Deformation and Subsequent Annealing on the Microstructure and Hardness of an Al0.3CoCrFeNi High-entropy Alloy

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Acta Metallurgica Sinica (English Letters) Aims and scope

Abstract

The influence of simple thermomechanical processing such as hot deformation and heat treatment on the microstructure and hardness of an Al0.3CoCrFeNi high-entropy alloy has been investigated. Results show that the relatively high deformation temperature can induce discontinuous dynamic recrystallization with fine grains initially nucleating at the elongated grain boundaries. The transition from partial recrystallization to fully recrystallization, as well as the precipitation behavior after annealing, has been described in detail. Both bcc precipitation and completely recrystallized grains can be observed after annealing at 1000 °C. Based on detailed microstructure analysis, the decrease in hardness value is shown to be related to both dynamic recrystallization and dynamic recovery which lead to softening.

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Data Availability

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

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Acknowledgements

This work was financially supported by the Natural Science Foundation of China (No. 51774240), the Natural Science Foundation of Chongqing, China (No. cstc2020jcyj-msxmX0976), the Innovation Capability Support Program of Shaanxi (No. 2020KJXX-073) and the Fundamental Research Funds for the Central Universities.

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Authors and Affiliations

  1. State Key Laboratory of Solidification Processing, Northwestern Polytechnical University, Xi’an, 710072, China

    Jun Wang, Hongchao Li, Haoxue Yang, Yu Zhang, William Yi Wang & Jinshan Li

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  1. Jun Wang
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  2. Hongchao Li
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  3. Haoxue Yang
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  4. Yu Zhang
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Correspondence to Jun Wang.

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Wang, J., Li, H., Yang, H. et al. Hot Deformation and Subsequent Annealing on the Microstructure and Hardness of an Al0.3CoCrFeNi High-entropy Alloy. Acta Metall. Sin. (Engl. Lett.) 34, 1527–1536 (2021). https://doi.org/10.1007/s40195-021-01251-z

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  • DOI: https://doi.org/10.1007/s40195-021-01251-z

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