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Effect of Ruthenium on Precipitation Behavior of the Topologically Close-Packed Phase in a Single-Crystal Ni-Based Superalloy During High-Temperature Exposure

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Abstract

The precipitation behaviors of the topologically close-packed (TCP) phase in the Ru-free and Ru-containing single-crystal Ni-based superalloys have been investigated. All the TCP phases have been identified as the μ phase with large numbers of planar defects by using a scanning transmission electron microscope (STEM). The addition of 3 wt pct Ru effectively suppresses the nucleation of the μ phase because the addition of 3 wt pct Ru not only decreases the supersaturation of γ phase but also increases the elastic strain energy for the nucleation of the μ phase. Additionally, the addition of 3 wt pct Ru makes more Re enter the μ phase during its growth and the critical nucleus radius of the μ phase becomes larger. Therefore, it is found that the addition of 3 wt pct Ru decreases the growth rate of the μ phase.

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Acknowledgments

This work was financially supported by the National Basic Research Program (973 Program) of China under Grant 2010CB631200 (2010CB631206) and by the National Natural Science Foundation of China (NSFC) under grants 50931004 and U1037601. The authors are grateful for the support.

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Author notes

  1. Hyun Uk Hong (Senior Researcher, Associate Professor)

    Present address: Department of Materials Science and Engineering, Changwon National University, Changwon, 641-773, Republic of Korea

Authors and Affiliations

  1. Superalloy Division, Institute of Metal Research, Chinese Academy of Sciences, Shenyang, 110016, P.R. China

    Xipeng Tan (Ph.D. Student), Jinlai Liu (Associate Professor), Tao Jin (Professor) & Zhuangqi Hu (Professor)

  2. High Temperature Materials Research Group, Korea Institute of Materials Science, Changwon, 641-831, Republic of Korea

    Hyun Uk Hong (Senior Researcher, Associate Professor), Baig Gyu Choi (Principal Researcher), In Soo Kim (Principal Researcher), Young Soo Yoo (Principal Researcher) & Chang Yong Jo (Principal Researcher)

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  1. Xipeng Tan
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Corresponding author

Correspondence to Tao Jin.

Additional information

Manuscript submitted September 13, 2011.

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Tan, X., Liu, J., Jin, T. et al. Effect of Ruthenium on Precipitation Behavior of the Topologically Close-Packed Phase in a Single-Crystal Ni-Based Superalloy During High-Temperature Exposure. Metall Mater Trans A 43, 3608–3614 (2012). https://doi.org/10.1007/s11661-012-1163-z

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