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Surface recrystallization of a Ni3Al based single crystal superalloy at different annealing temperature and blasting pressure

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Abstract

The effects of annealing temperature and grit blasting pressure on the recrystallization behavior of a Ni3Al based single crystal superalloy were studied in this work. The results show that the precipitation of the Y-NiMo phase occurs at 900 and 1000 °C, which precedes recrystallization. The initial recrystallization temperature was between 1000 and 1100 °C. Cellular recrystallization was formed at 1100 and 1200 °C, which consisted of large columnar γ′ and fine γ + γ′. The dendrite arm closed to the interdendritic region may act as nucleation sites during initial recrystallization by a particle simulated nucleation mechanism at 1280 °C. The size of the grains first turned large and then became small upon the pressure while the recrystallization depth increased all the time.

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Authors and Affiliations

  1. Key Laboratory of Aerospace Materials and Performance (Ministry of Education), School of Materials Science and Engineering, Beijing University of Aeronautics and Astronautics, Beijing, 100191, China

    Yuxiao Wu, Ruibo Yang, Shusuo Li, Yue Ma, Shengkai Gong & Yafang Han

  2. Beijing Institute of Aeronautical Materials, Beijing, 100095, China

    Yafang Han

Authors
  1. Yuxiao Wu
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  2. Ruibo Yang
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  3. Shusuo Li
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  4. Yue Ma
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  5. Shengkai Gong
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  6. Yafang Han
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Correspondence to Shusuo Li or Shengkai Gong.

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Wu, Y., Yang, R., Li, S. et al. Surface recrystallization of a Ni3Al based single crystal superalloy at different annealing temperature and blasting pressure. Rare Metals 31, 209–214 (2012). https://doi.org/10.1007/s12598-012-0493-8

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  • DOI: https://doi.org/10.1007/s12598-012-0493-8

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