Metal Science and Heat Treatment

, Volume 16, Issue 12, pp 1060–1062 | Cite as

Structure of αγ phase in alloys of the YuNDK and YuNDKT type

  • R. P. Leshchinskaya
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Conclusions

  1. 1.

    In alloys YuNDK and YuNDKT cooled from the two-phase region at rates of 50–100 deg/min the αγ has a martensitic structure. This confirms the assumption of a diffusionless mechanism of the γ→αγ transformation. At cooling rates considerably lower than 50–100 deg/min and during isothermal holding in a temperature range near the lower limit of the two-phase region the diffusional γ→α transformation is possible.

     
  2. 2.

    In alloy YuNDK24 the rate of the diffusional transformation is highest at 740°C; in this case it is completed in 3 h. In alloys YuNDK35T5 and YuNDK40T7 only the partial diffusional γ→α transformation occurs. The rate of the transformation is highest at 780°C.

     

Keywords

Cool Rate Lower Limit Isothermal Holding Martensitic Structure Diffusional Transformation 

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Literature cited

  1. 1.
    E. Planchard, R. Meyer, and G. Bronner, Z. Angew. Phys.,17, 3, 175–176 (1964).Google Scholar
  2. 2.
    M. D. Perkas and V. M. Kordonskii, High-Strength Maraging Steels [in Russian], Metallurgiya, Moscow (1970), p. 15.Google Scholar

Copyright information

© Plenum Publishing Corporation 1975

Authors and Affiliations

  • R. P. Leshchinskaya

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