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Effect of Ultrasonic Treatment on Solidification Microstructure of a New Nickel-Based Superalloy 4716MA0

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Abstract

The solidification microstructure of 4716MA0 Ni-based superalloy was studied by ultrasonic treatment. The precipitation behavior of 4716MA0 were observed by means of optical microscopy, scanning electron microscope (SEM + EDS) and X-ray diffraction, and the reasons for the change of microstructure were explained. The results show that the coarse dendrites change into the equiaxed crystals, and the grain size is refined from 266 to 102 μm. It mainly consists of γ matrix phase, γ′ reinforced phase, γ/γ′ eutectic and MC carbides. The area fraction of shrinkage cavities, carbides and γ/γ′ eutectic are decreased from 3.26 to 0.67%, 12.66 to 6.24%, and 15.38 to 7.88%, respectively. The cavitation effect and acoustic streaming effect of ultrasonic can improve the undercooling of melt components, promote grain nucleation and prevent grain growth, at the same time, the composition segregation is inhibited and the number of carbides and γ/γ′ eutectic is reduced.

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Acknowledgements

Supported by the fund of State Key Laboratory of Long-life High Temperature Materials (DTCC28EE200795) and Technology Project of Nanchong and Southwest Petroleum University (SWPU) Cooperation (No. SXQHJH032).

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Authors and Affiliations

  1. State Key Laboratory of Long-Life High Temperature Materials, Deyang, 618000, China

    Haiyang Wang, Xiufang Gong & Zhaohong Yang

  2. Dongfang Electric Corporation Dongfang Turbine Co., LTD, Deyang, 618000, China

    Haiyang Wang, Xiufang Gong & Zhaohong Yang

  3. School of New Energy and Materials, Southwest Petroleum University, Chengdu, 610500, China

    Pengcheng Wen, Bin Wang, Liang Wang & Mei Yang

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  1. Haiyang Wang
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  2. Pengcheng Wen
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  5. Bin Wang
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Correspondence to Mei Yang.

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Wang, H., Wen, P., Gong, X. et al. Effect of Ultrasonic Treatment on Solidification Microstructure of a New Nickel-Based Superalloy 4716MA0. Trans Indian Inst Met 75, 2107–2115 (2022). https://doi.org/10.1007/s12666-022-02588-4

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  • DOI: https://doi.org/10.1007/s12666-022-02588-4

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