+Advanced Search
Designing of the Homogenization-Solution Heat Treatment for Advanced Single Crystal Superalloys
Author:
Affiliation:

Science and Technology on Advanced High Temperature Structural Materials Laboratory,Beijing Institute of Aeronautical Materials,Science and Technology on Advanced High Temperature Structural Materials Laboratory,Beijing Institute of Aeronautical Materials,Science and Technology on Advanced High Temperature Structural Materials Laboratory,Beijing Institute of Aeronautical Materials,Science and Technology on Advanced High Temperature Structural Materials Laboratory,Beijing Institute of Aeronautical Materials

Fund Project:

National Key Basic Research Program of China (“973” Program) (2011CBA00104); the International Scientific and Technological Cooperation Projects of China (S2010GR0518); the National Natural Science Foundation of China (51102198)

  • Article
  • | |
  • Metrics
  • |
  • Reference [22]
  • |
  • Related [20]
  • | | |
  • Comments
    Abstract:

    To design more efficient homogenization-solution heat treatments for advanced single crystal superalloys, an experimental single crystal superalloy was studied after homogenization-solution heat treatments with different temperatures and durations. Metallographic and field emission microscope were used to observe microstructures; electron probe was applied for component analysis. The results show that no incipient melting appears when the alloy is directly heated up to 1338℃; when it is directly heated up to 1350℃, obvious incipient melting occurs, while the incipient melting microstructure gradually fades away with holding time; for an lower temperature 1328℃, although there is no risk of incipient melting, the homogenization-solution efficiency is far from satisfactory. After analyzing the results by aid of dynamics and thermodynamics calculation, it can be concluded that the single crystal superalloy owns a dynamic homogenization-solution heat treatment window: both the γ′ solvus end temperature and the incipient melting temperature increase with the homogenization process. Such dynamic characteristic is especially noticeable for advanced single crystal superalloys since the segregation is more severe. There is no need to always keep the homogenization-solution heat treatment temperature below the incipient melting temperature of the as-cast condition, but keeping it below the incipient melting temperature of the alloy at the temporal homogenous state is necessary. For advanced single crystal superalloys, elevating temperatures of each step is much more effective than prolonging duration to get better heterogeneous effect. By using above conclusions, a new approach is introduced to design effective homogenization-solution heat treatments for advanced single crystal superalloys, and it has been successfully used on the experimental single crystal superalloy.

    Reference
    1Li J R, Zhong Z G, Tang D Z et al. Superalloys 2000[C], Seven Springs, 2000: 777
    2D'Souza N, Dong H B. Superalloys 2008[C], Seven Springs, 2008: 261
    3Fuchs G E, Materials Science and Engineering A[J], 2008, 300: 52
    4Erickson G L, JOM[J], 1995, 47: 36
    5Cetel A D and Duhl D. Superalloys 1988[C], Seven Springs, 1988: 235
    6Wukusick C S, Buchakjian L Jr. UK patent[P], 1986, 2235697 A
    7Duhl D N, Cetel A D. US Patent t[P], 1985, 4719080
    8Hegde S R, Kearsey R M, Beddoesas J C, Materials Science and Engineering A[J], 2010, 527 :5528
    9Warnken N, Larsson H, Reed R C, Materials Science and Technology[J], 2009, 25: 179
    10Walston S, Cetel A, MacKay R et al. Superallosys 2004[C], Seven Springs, 2004: 15
    11Caron P. Superalloys 2000[C], Seven Springs, 2000: 737.
    12Pang H T, Zhang L, Hobbs R A et al. Metallurgical and Materials Tranactions A[J], 2012, 43A: 3264
    13Fuchs G E. Materials Science and Engineering A[J], 2001, 300: 52
    14Acharya M V, Fuchs G E. Materials Science and Engineering A[J], 2004, 381: 143.
    15Kawagishi K, Yeh A C, Yokokawa T, et al. Superalloys 2012[C], Seven Springs, 2012: 189
    16Sato A, Harada, Yen A C, Kawagishi K. in: Superalloys 2008[C], Seven Springs, 2008: 131
    17Tao Keming. Physical and chemical examination of trace evidence in forensic sciences—Part 12: Thermoanalysis[S]. Beijing: China Standards Press, 2008: 3
    18Chen Yingchun, Deng Zhenning, Zhuo Ping, Gong Chengxian, Thermal analysis test methods for thermal stability of materials[S]. Beijing: China Standards Press, 2008: 3
    19Caldwell E C, Fela F J, Fuchs G E. Superalloys 2004[C], Seven Springs, 2004: 811
    20Xu Hhengjun. Fundamentals of Materials Science [M]. Beijing: Beijing University of Industry Publisher, 2001: 119
    21Xu Hhengjun. Fundamentals of Materials Science [M]. Beijing: Beijing University of Industry Publisher, 2001: 128
    22Xu Hhengjun. Fundamentals of Materials Science [M]. Beijing: Beijing University of Industry Publisher, 2001: 304
    Cited by
    Comments
    Comments
    分享到微博
    Submit
Get Citation

[Yue Xiaodai, Li Jiarong, Shi Zhenxue, Wang Xiaoguang. Designing of the Homogenization-Solution Heat Treatment for Advanced Single Crystal Superalloys[J]. Rare Metal Materials and Engineering,2017,46(6):1530~1535.]
DOI:[doi]

Copy
Article Metrics
  • Abstract:1827
  • PDF: 1468
  • HTML: 175
  • Cited by: 0
History
  • Received:March 25,2015
  • Revised:July 14,2015
  • Adopted:October 13,2015
  • Online: November 07,2017