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Formation of Accumulated Misorientation During Directional Solidification of Ni-Based Single-Crystal Superalloys

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Abstract

The formation of accumulated misorientation during directional solidification of Ni-based single-crystal superalloys with 〈001〉 direction deviating from cylinder axis by 20 deg was investigated at different withdrawal rates. The accumulated misorientation increased from the converging side of the dendrite with respect to the mold wall to the diverging side in the radial direction. With increased solidification distance, the accumulated misorientation in the solidification direction reached 7.6 deg, and was not significantly affected by withdrawal rates.

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This work was supported by the National Natural Science Foundation of China (Grant Numbers 51331005, 51771148, 51631008, 51690163, 51501152, 51501151), the National Key Research and Development Program (Grant Number 2016YFB0701400), and Excellent Doctorate Cultivating Foundation of Northwestern Polytechnical University.

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Correspondence to Lin Liu or Wenchao Yang.

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Manuscript submitted October 1, 2018.

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Hu, S., Liu, L., Yang, W. et al. Formation of Accumulated Misorientation During Directional Solidification of Ni-Based Single-Crystal Superalloys. Metall Mater Trans A 50, 1607–1610 (2019). https://doi.org/10.1007/s11661-018-05109-5

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  • DOI: https://doi.org/10.1007/s11661-018-05109-5

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