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Microstructure and Tensile Mechanical Behavior of a Single-Phase Fe35Mn10Cr20Ni35 High-Entropy Alloy

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Abstract

A single-phase Fe35Mn10Cr20Ni35 (presented in at.%, unless otherwise stated) high-entropy alloy (HEA) was synthesized by an electric arc melting plus copper mold casting method. The microstructure was characterized by X-ray diffraction, scanning electron microscopy and transmission electron microscopy. The thermostability of the prepared alloy was examined by differential scanning calorimetry. The mechanical behavior was examined by a tensile test. The prepared Fe35Mn10Cr20Ni35 alloy possesses a simple FCC phase structure with excellent structural stability. This alloy has a good combination of strength and ductility. It is observed that the prepared HEAs, either in the as-cast state or in the as-homogenized state, have a considerably higher strain hardening exponent than common alloys during tensile deformation, and the deformation mechanism was determined to be that first dislocation slipping and then twinning support continuous plastic deformation.

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Acknowledgments

This work was funded by National Major Basic Research Project of China (Grant No.: 613321). The authors thank Dr. Aiqun Xu for TEM observation.

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  1. School of Materials Science and Engineering, Jiangsu Key Laboratory of Advanced Metallic Materials, Southeast University, Nanjing, 211189, China

    Jun Zhou, Hengcheng Liao, Hao Chen & Aijing Huang

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  1. Jun Zhou
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Correspondence to Hengcheng Liao.

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Zhou, J., Liao, H., Chen, H. et al. Microstructure and Tensile Mechanical Behavior of a Single-Phase Fe35Mn10Cr20Ni35 High-Entropy Alloy. J. of Materi Eng and Perform 30, 3352–3362 (2021). https://doi.org/10.1007/s11665-021-05700-9

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