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Evolution of microstructure and hardness in a dual-phase Al0.5CoCrFeNi high-entropy alloy with different grain sizes

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Abstract

Cold-rolling with subsequent annealing was carried out to produce recrystallized structures with different grain sizes in an Al0.5CoCrFeNi high-entropy alloy to systematically investigate the grain growth behavior and varying properties. The results show that recrystallized microstructures can be achieved through an annealing process at 1200 °C for 75 min to 16 h, and the average grain size in this study ranges from 5.33 to 30.03 µm. The hardness shown to be affected through grain coarsening was then measured as a function of the grain size, and it is found to follow the classical Hall–Petch strengthening.

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Acknowledgements

This study was financially supported by the National Natural Science Foundation of China (Nos. 51571161 and 51774240).

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Authors and Affiliations

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

    Hao-Xue Yang, **-Shan Li, Tong Guo, William-Yi Wang, Hong-Chao Kou & Jun Wang

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  1. Hao-Xue Yang
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  2. **-Shan Li
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  3. Tong Guo
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Correspondence to Jun Wang.

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Yang, HX., Li, JS., Guo, T. et al. Evolution of microstructure and hardness in a dual-phase Al0.5CoCrFeNi high-entropy alloy with different grain sizes. Rare Met. 39, 156–161 (2020). https://doi.org/10.1007/s12598-019-01320-4

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