Kai Chen, Shu-yuan Rui, Fa Wang, Jian-xin Dong, and Zhi-hao Yao, Microstructure and homogenization process of as-cast GH4169D alloy for novel turbine disk, Int. J. Miner. Metall. Mater., 26(2019), No. 7, pp. 889-900. https://doi.org/10.1007/s12613-019-1802-0
Cite this article as:
Kai Chen, Shu-yuan Rui, Fa Wang, Jian-xin Dong, and Zhi-hao Yao, Microstructure and homogenization process of as-cast GH4169D alloy for novel turbine disk, Int. J. Miner. Metall. Mater., 26(2019), No. 7, pp. 889-900. https://doi.org/10.1007/s12613-019-1802-0
Research Article

Microstructure and homogenization process of as-cast GH4169D alloy for novel turbine disk

+ Author Affiliations
  • Corresponding author:

    Zhi-hao Yao    E-mail: zhihaoyao@ustb.edu.cn

  • Received: 21 November 2018Revised: 23 December 2018Accepted: 2 January 2019
  • To investigate the microstructure, segregation, and suitable homogenization process of as-cast GH4169D alloy, the microstructure, elements segregation, and precipitates of cast GH4169D ingots prepared by vacuum induction melting (VIM) and vacuum arc remelting (VAR) were observed by optical microscopy (OM), scanning electron microscopy, and energy-dispersive X-ray spectroscopy (EDS). According to the residual segregation model and simulation results of DICTRA thermodynamic software, the homogenization temperature and time range were set as 1120-1170℃ and 5-20 h, respectively. The experimental results showed that microscopic dendrite and element segregation occurred in the interior of ingots and the main segregation elements were Nb and Ti. In addition, the precipitates were mainly distributed in interdendritic regions and were composed of NbC, Laves, γ', and δ phases. The homogenization process suggested that the interdendritic detrimental precipitated Laves phase can be eliminated or redissolved after homogenization at 1150℃ for 20 h, suggesting it was the most suitable homogenization treatment. Thermal compression test results showed that the GH4169D alloys after homogenization treatment had no cracks and dynamic recrystallization occurred, with recrystallization volume fraction increasing with temperature, indicating a good working plasticity at temperatures from 1050 to 1200℃.
  • loading
  • [1]
    Z.L. Wang, Z.T. Zheng, L.B. Zhao, Y.F. Lei, and K. Yang, Microstructure evolution and nucleation mechanism of Inconel 601H alloy welds by vibration-assisted GTAW, Int. J. Miner. Metall. Mater., 25(2018), No. 7, p. 788.
    [2]
    Z.C. Peng, G.F. Tian, J. Jiang, M.Z. Li, C. Yang, J.W. Zou, and F.P.E. Dunne, Mechanistic behaviour and modelling of creep in powder metallurgy FGH96 nickel superalloy, Mater. Sci. Eng. A, 676(2016), p. 441.
    [3]
    X.P. Ren and Z.Q. Liu, Microstructure refinement and work hardening in a machined surface layer induced by turning Inconel 718 super alloy, Int. J. Miner. Metall. Mater., 25(2018), No. 8, p. 937.
    [4]
    W.D. Cao and R. Kennedy, Role of chemistry in 718-type alloys-Allvac® 718PlusTM alloy development,[in] K.A. Green, T.M. Pollock, H. Harada, T.E. Howson, R.C. Reed, J.J. Schirra, and S. Walston, eds, Superalloys, TMS (The Minerals, Metals &Materials Society), 2004, p. 91.
    [5]
    M.Q. Wang, J.H. Du, Q. Deng, Z.L. Tian, and J. Zhu, The effect of phosphorus on the microstructure and mechanical properties of ATI 718Plus alloy, Mater. Sci. Eng. A, 626(2015), p. 382.
    [6]
    A. Momeni, S.M. Abbasi, M. Morakabati, and H. Badri, A comparative study on the hot working behavior of inconel 718 and ALLVAC 718 plus, Metall. Mater. Trans. A, 48(2017), No. 3, p. 1216.
    [7]
    K. Chen, J.X. Dong, Z.H. Yao, T.W. Ni, and M.Q. Wang, Creep performance and damage mechanism for Allvac 718Plus superalloy, Mater. Sci. Eng. A, 738(2018), p. 308.
    [8]
    W.D. Cao, Thermal stability characterization of Ni-base ATI 718Plus® superalloy,[in] R.C. Reed, K.A. Green, P. Caron, T.P. Gabb, M.G. Fahrmann, E.S. Huron, and S.A. Woodard, eds, Superalloys, TMS (The Minerals, Metals &Materials Society), 2008, p. 789.
    [9]
    L. Whitmore, H. Leitner, E. Povoden-Karadeniz, R. Radis, and M. Stockinger, Transmission electron microscopy of single and double aged 718Plus superalloy, Mater. Sci. Eng. A, 534(2012), p. 413.
    [10]
    N.C. Eurich and P.D. Bristowe, Thermodynamic stability and electronic structure of η-Ni6Nb(Al,Ti) from first principles, Scripta Mater., 77(2014), p. 37.
    [11]
    G.A. Zickler, R. Radis, R. Schnitzer, E. Kozeschnik, M. Stockinger, and H. Leitner, The precipitation behavior of superalloy ATI Allvac 718Plus, Adv. Eng. Mater., 12(2010), No. 3, p. 176.
    [12]
    S.A. Hosseini, K.Z. Madar, and S.M. Abbasi, Effect of homogenization heat treatments on the cast structure and tensile properties of nickel-base superalloy ATI 718Plus in the presence of boron and zirconium additions, Mater. Sci. Eng. A, 689(2017), p. 103.
    [13]
    G.X. Cao, M.C. Zhang, J.X. Dong, Z.H. Yao, and L. Zheng, Effects of Nb content variations on precipitates evolution of GH4169 ingots during their solidification and homogenization processes, Rare Met. Mater. Eng., 43(2014), No. 1, p. 103.
    [14]
    S.L. Semiatin, R.C. Kramb, R.E. Turner, F. Zhang, and M.M. Antony, Analysis of the homogenization of a nickel-base superalloy, Scripta Mater., 51(2004), No. 6, p. 491.
    [15]
    H. Jiang, J.X. Dong, M.C. Zhang, and Z.H. Yao, Microstructure and homogenization of as-cast 617B alloy for 700℃ ultra-supercritical boilers, J. Univ. Sci. Technol. Beijing, 36(2014), No. 6, p. 795.
    [16]
    J. Wang, Y. Wu, J.X. Dong, M.C. Zhang, X.S. Xie, and F.H. Xu, Microstructure and homogenization of as-cast GH4700 alloy for 700℃ ultra-supercritical boilers, Rare Met. Mater. Eng., 42(2013), No. 9, p. 1908.
    [17]
    D. Srinivasan, Effect of long-time exposure on the evolution of minor phases in Alloy 718, Mater. Sci. Eng. A, 364(2004), No. 1-2, p. 27.
    [18]
    E.J. Pickering, H. Mathur, A. Bhowmik, O.M.D.M. Messé, J.S. Barnard, M.C. Hardy, R. Krakow, K. Loehnert, H.J. Stone, and C.M.F. Rae, Grain-boundary precipitation in Allvac 718Plus, Acta Mater., 60(2012), No. 6-7, p. 2757.
    [19]
    L. Gong, B. Chen, Z.H. Du, M.S. Zhang, R.C. Liu, and K. Liu, Investigation of solidification and segregation characteristics of cast Ni-base superalloy K417G, J. Mater. Sci. Technol., 34(2018), No. 3, p. 541.
    [20]
    H. Zhang, Y. Liu, X. Chen, H.W. Zhang, and Y.X. Li. Microstructural homogenization and high-temperature cyclic oxidation behavior of a Ni-based superalloy with high-Cr content, J. Alloys Compd., 727(2017), p. 410.
    [21]
    A. Hillert, Diffusion and Thermodynamics of Alloys, The Metallurgy Industry Press, Beijing, 1984, p. 32.
    [22]
    L.J. Huang, F. Qi, P.T. Hua, L.X. Yu, F. Liu, W.R. Sun, and Z.Q. Hu, Discontinuous dynamic recrystallization of inconel 718 superalloy during the superplastic deformation, Metall. Mater. Trans. A., 46(2015), No. 9, p. 4276.
    [23]
    M. Song, J.F. Wen, Z. Jiao, and G.S. Was, Elastic strain energy control of the precipitate free zone around primary carbides in nickel base alloy 725, Acta Mater., 120(2016), p. 138.
  • 加载中

Catalog

    通讯作者: 陈斌, bchen63@163.com
    • 1. 

      沈阳化工大学材料科学与工程学院 沈阳 110142

    1. 本站搜索
    2. 百度学术搜索
    3. 万方数据库搜索
    4. CNKI搜索

    Share Article

    Article Metrics

    Article Views(535) PDF Downloads(34) Cited by()
    Proportional views

    /

    DownLoad:  Full-Size Img  PowerPoint
    Return
    Return