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Metal Science and Heat Treatment of Metals

, Volume 2, Issue 9, pp 473–476 | Cite as

Structure and composition of the surface layer of gas turbine blades

  • P. T. Kolomytsev
  • A. A. Samgin
  • A. Ya. Snetkov
Heat-Resistant Steels and Alloys
  • 23 Downloads

Conclusions

  1. 1.

    The surface layer of a turbine blade consists of a succession of layers: recrystallized + fine-grained; and work hardened characterized by an increased hardness and lattice spacing of the solid solution; and an undeformed one. The content of alloy elements in the surface layer differs considerably from the mean composition of the alloy.

     
  2. 2.

    The adverse effect of surface work-hardening on heat resistance is associated with the large gradient of lattice parameters at high temperature and with consequent internal stresses.

     
  3. 3.

    Cracking during extended operation at high temperature is caused by a depletion of the surface layer in alloy elements which, under normal conditions, ensure the high heat resistance of the alloy.

     

Keywords

Adverse Effect Solid Solution Surface Layer Normal Condition Internal Stress 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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References

  1. 1.
    V. A. Parfenov, Teploenergetika, vol. 4, 1957, #9.Google Scholar
  2. 2.
    Ya. S. Umanskii and Others, Physics of Metals (Fizicheskoe Met.) [Book] Metallurgizdat, 1955.Google Scholar
  3. 3.
    V. A. Parfenov,Metallovedenie i Obr. Met., 1955, #1.Google Scholar
  4. 4.
    V. A. Parfenv,Teploenergetika, vol. 3, 1956, #5.Google Scholar
  5. 5.
    F. Malamand and G. Vidal,Metaux-Corrosion-Industries, July/August, 1957, #383–384, 286–99.Google Scholar

Copyright information

© Consultants Bureau 1960

Authors and Affiliations

  • P. T. Kolomytsev
  • A. A. Samgin
  • A. Ya. Snetkov

There are no affiliations available

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