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Microstructure and Solidification Characteristics and Segregation Behavior of Superalloy K4169

  • Xiaoliang Li
  • Bo Chen
  • Weiwei Xing
  • Long Zhang
  • Yingche Ma
  • Kui Liu
Conference paper

Abstract

The solidification process and segregation feature of K4169 alloy is studied by DSC, Thermo-Calc simulation and isothermal solidification analyses. The segregation and precipitation behavior of superalloy K4169 during isothermal solidification at 1360 and 1120 °C have been observed by the means of optical microscopy (OM), electron probe microanalysis (EPMA), scanning electron microscope (SEM) and transmission electron microscopy (TEM). The results stated that the solidification began with the formation of primary γ dendrites, and accompanied by the formation of MC carbides. During the solidification, Nb, Mo and Ti were enriched in the residual liquid phase, which eventually lid to the formation of MC carbides and Laves phases. The liquidus of K4169 was 1354 °C, and the solidus was 1240 °C. Its solidification sequence can be identified as follows: L → γ at 1354 °C; L → γ + MC at 1290 °C; L → γ + Laves at 1120 °C.

Keywords

K4169 alloy Isothermal solidification Elemental segregation Laves phase 

References

  1. 1.
    Keren Zhang, Faqin Xie, Rui Hu and Xiangqing Wu, Relationship between microstructure and mechanical properties of undercooled K4169 superalloy, Trans. Nonferrous Met. Soc. China 26 (2016) 1885–1891.Google Scholar
  2. 2.
    K.V.U. Praveen, G.V.S. Sastry and Vakil Singh, Work-Hardening Behavior of the Ni-Fe Based Superalloy IN718, Metallurgical and Materials transactions A 39A (2008) 65–78.Google Scholar
  3. 3.
    H.Y. Zhang, S.H. Zhang, M. Cheng and Z.X. Li, Deformation characteristics of δ phase in the delta-processed Inconel 718 alloy, Materials characterization 61 (2010) 49–53.Google Scholar
  4. 4.
    Xiong Yuhua, Liu Wei, Yang Aimin, Zhang Rong and Liu Lin, Effects of Ni-Al-Ti refiner on grain structure and mechanical properties of cast superalloy K4169, Acta Metallurgica Sinica 35 (7) (1999) 689–692.Google Scholar
  5. 5.
    Guo Jianting, Effects of several minor elements on superalloys and their mechanism, The Chinese Journal of Nonferrous Metals 21 (3) (2011) 465–476.Google Scholar
  6. 6.
    Y. Murata, M. Morinaga, N. Yukawa, H. Ogawa and M. Kato, Solidification Structures of Inconel 718 with Microalloying Elements, Superalloys 718,625,706 and Various Derivatives Edited by E.A. Loria The Minerals, Metals & Materials Society, 1994.Google Scholar
  7. 7.
    G.A. Knorovsky, M.J. Cielsak, T.J. Headley, A.D. Romig, Jr., and W. E Hammetter, Inconel 718: a solidification diagram, Metallurgical transactions A 20A (1989) 2149–2159.Google Scholar
  8. 8.
    G.E. Fuchs and B.A. Boutwell, Calculating solidification and transformation in as-cast CMSX-10, Modeling High-Temperature Materials (2002) 45–49.Google Scholar
  9. 9.
    J. Lecomte-Beckers, Study of solidification features of nickel-base superalloys in relation with composition, Metallurgical transactions A 19A (1988) 2333–2341.Google Scholar
  10. 10.
    R. Liu, S. Q. Xi, S. Kapoor and X. J. Wu, Investigation of solidification behavior and associate microstructures of Co–Cr–W and Co–Cr–Mo alloy systems using DSC technique, J Mater Sci 45 (2010) 6225–6234.Google Scholar
  11. 11.
    Zhaoxia Shi, Jianxin Dong, Maicang Zhang and Lei Zheng, Solidification characteristics and segregation behavior of Ni-based superalloy K418 for auto turbocharger turbine, Journal of Alloys and Compounds 571 (2013) 168–177.Google Scholar
  12. 12.
    Seong-Moon Seoa, Hi-Won Jeonga, Young-Keun Ahna, Dae Won Yuna, Je-Hyun Leeb and Young-Soo Yoo, A comparative study of quantitative microsegregation analyses performed during the solidification of the Ni-base superalloy CMSX-10, Materials characterization 89 (2014) 43–55.Google Scholar

Copyright information

© Springer Nature Singapore Pte Ltd. 2018

Authors and Affiliations

  • Xiaoliang Li
    • 1
    • 2
  • Bo Chen
    • 1
  • Weiwei Xing
    • 1
  • Long Zhang
    • 1
  • Yingche Ma
    • 1
  • Kui Liu
    • 1
  1. 1.Institute of Metal Research, Chinese Academy of SciencesShenyangChina
  2. 2.School of Materials Science and EngineeringUniversity of Science and Technology of ChinaShenyangChina

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