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Role of Ru on the microstructure and property of novel Co–Ti–V Superalloy

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Abstract

In the present paper, the authors investigated the microstructures and mechanical properties of dual-phase Co–Ti–V-based superalloys with different additions of Ru. The results showed that with the increase of Ru contents, the size of γ′ precipitates of the alloy gradually raised, the volume fraction of γ′ phase slightly, and the lattice misfit between γ/γ′ phases increased. Ru was enriched in the γ′ phase, and the elemental partition coefficients (KX = Cγ′/Cγ) of Ti and V increased with the increment of Ru. The Ru contents have no remarkable influence on the solvus temperatures of γ′ in the Co–Ti–V alloys. The yield strength at 1000 °C of the Co–10Ti–11V–0.5Ru alloy was the highest, while the yield strength of the 1Ru alloy was the smallest. Transmission electron microscopy and scanning electron microscopy observations showed that the γ′ shape in the compressed specimen containing 0.5Ru remain integrated, while the γ′ in other alloys were cut into several parts.

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Acknowledgments

This research was financially supported from Project (51471079) by the National Natural Science Foundation of China and Project (BK20130464) by the Jiangsu Natural Science Foundation. The authors would also like to acknowledge the financial support from the Jiangsu Government scholarship for Oversea Studies. This work also supported by the State Key Laboratory of Powder Metallurgy, Central South University, Changsha, China; the Key Research and Development Program of Shaanxi (Program Nos. 2019GY-151, 2019GY-178, and 2020GY-251); the National Natural Science Foundation of China (51901193); and the Science and Technology Plan Project of Weiyang District in Xi'an City (201905).

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Authors and Affiliations

  1. School of Materials Science and Engineering, Jiangsu University of Science and Technology, Zhenjiang, 212003, China

    Pengjie Zhou, Xinkang Gao, Dehang Song, Qilong Liu & Yinbing Liu

  2. Northwest Institute for Nonferrous Metal Research, Shanxi Key Laboratory of Biomedical Metal Materials, Xi'an, 710016, China

    Jun Cheng

  3. State Key Laboratory of Solidification Processing, Northwestern Polytechnical University, Xi'an, 710072, China

    Jun Cheng

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  1. Pengjie Zhou
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Correspondence to Pengjie Zhou.

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Zhou, P., Gao, X., Song, D. et al. Role of Ru on the microstructure and property of novel Co–Ti–V Superalloy. Journal of Materials Research 35, 2737–2745 (2020). https://doi.org/10.1557/jmr.2020.251

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