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Effect of Oxygen on the Microstructure and Mechanical Properties of Ti1.5ZrNbMoV Refractory High-Entropy Alloy

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Abstract

Alloying is a crucial and effective strategy for developing high-entropy alloys (HEAs) with enhanced mechanical properties. In this study, a series of (Ti1.5ZrNbMoV)100 − xOx refractory HEAs (x = 0, 0.5, 1.0, 1.5, 2.0, and 3.0) were prepared using a vacuum arc melting method. Within the given range of O content, the single body-centered cubic (BCC) solid solution structure of the base alloy remained unchanged. However, the morphology of the dendrites displayed noticeable alterations with increase in oxygen content. The study revealed a positive correlation between the oxygen content and the hardness and yield strength of the alloys. This trend was attributed to the presence of oxygen atoms in the solid solution of the BCC matrix, which contributed to the alloy’s enhanced strength. The alloy containing 0.5 at.% oxygen exhibited the highest ductility among all the studied compositions. The improved ductility could be attributed to the relatively large fraction of the dendrites with smoother and blunt boundaries. These features effectively reduced stress concentration and increased the complexity of the facture surface, thereby enhancing the ductility of the alloy. These findings provide valuable insights for tailoring the properties of high-entropy alloys by carefully controlling their oxygen content.

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Acknowledgment

Financial supports from Changzhou Science and Technology Bureau (No. CJ20235060, CQ20210086, CJ20210065), the Natural Science Foundation of the Jiangsu Higher Education Institutions of China (23KJD430005), the Sichuan Science and Technology Program (No. 2022NSFSC1978), the Graduate Practice and Innovation Projects of Jiangsu University of Technology (XSJCX22_01), and Undergraduate Innovation and Entrepreneurship Training Program of Jiangsu Province (202211463053Y) are gratefully acknowledged.

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  1. Kaixuan Wang and Lixiang Chao, and Yan Li have contributed equally.

Authors and Affiliations

  1. School of Mechanical Engineering, Jiangsu University of Technology, Changzhou, 213001, People’s Republic of China

    Kaixuan Wang, Lixiang Chao, Yan Li, Lin Han, Guolian Yu, Yaoli Wang, Mingqin Xu & Jiaojiao Yi

  2. Laboratory of Advanced Multicomponent Materials, School of Mechanical Engineering, Jiangsu University of Technology, Changzhou, 213001, People’s Republic of China

    Lixiang Chao, Lin Han, Lu Wang, Lin Yang, Mingqin Xu & Jiaojiao Yi

  3. School of materials Science and Engineering, Jiangsu University of Technology, Changzhou, 213001, People’s Republic of China

    Lu Wang & Lin Yang

  4. School of Materials Science and Engineering, Shanghai Jiao Tong University, Shanghai, 200240, People’s Republic of China

    Wenquan Lu

  5. Shanghai Jiao Tong University Sichuan Research Institute, Chengdu, 610213, People’s Republic of China

    Wenquan Lu

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  1. Kaixuan Wang
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Wang, K., Chao, L., Li, Y. et al. Effect of Oxygen on the Microstructure and Mechanical Properties of Ti1.5ZrNbMoV Refractory High-Entropy Alloy. J. of Materi Eng and Perform (2024). https://doi.org/10.1007/s11665-024-09230-y

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