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Microstructure Evolution and Strengthening Mechanism of AlCrFe2NiCuMox High Entropy Alloys

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Abstract

The AlCrFe2NiCuMox multiphase high entropy alloys were designed, prepared and characterized. The effect of Mo addition on the microstructure evolution and mechanical properties of AlCrFe2NiCuMox high entropy alloys was investigated. The microstructure of AlCrFe2NiCuMox alloy consists of B2 + BCC + FCC + σ phases with a typical dendritic morphology. The addition of the Mo element promotes the generation of the σ phase in the alloy, while the B2 phase is gradually replaced by the σ phase. The hardness test and room temperature compression test results show that AlCrFe2NiCuMo0.6 alloy has a compressive rupture strength of 2030 MPa, a yield strength of 1462 MPa, a compressive strain limit of 18.18%, and a hardness of 488 HV, which has good comprehensive mechanical properties. With the increase of Mo element addition, the BCC solid solution phase and the ordered B2 phase separated in the alloy, and the σ phase precipitate from the BCC solid solution phase, and the mechanical properties of the alloy become worse at room temperature.

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Acknowledgements

We acknowledge financial support of the Natural Science Foundation of Shandong Province, China (ZR2017BEM003 and ZR2017MEE036) and China Postdoctoral Science Foundation (2018 M632695).

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Contributions

Junhui Zhao: conceptualization, methodology, investigation, validation, visualization, formal analysis, writing—original Draft. Jinshuai Zhang: investigation, resources, validation, data curation. Xiaoyi Li: methodology, resources, data curation, visualization. Xujie Gao: resources, writing—review and editing, supervision, validation. Nana Guo: conceptualization, funding acquisition, methodology, resources, writing—review and editing, supervision. Chengcheng Shi: resources, writing—review and editing. Guangming Zhu: Resources, writing—review and editing. Jinhua Ding: resources, writing—review and editing. Fengshi Yin: resources, writing—review and editing.

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Correspondence to Xujie Gao or Nana Guo.

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Zhao, J., Zhang, J., Li, X. et al. Microstructure Evolution and Strengthening Mechanism of AlCrFe2NiCuMox High Entropy Alloys. Met. Mater. Int. (2024). https://doi.org/10.1007/s12540-024-01687-9

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