Metal Science and Heat Treatment

, Volume 11, Issue 10, pp 755–757 | Cite as

Phase transformations in alloys of the zirconium - molybdenum system

  • V. N. Svechnikov
  • A. Ts. Spektor
Theory
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Conclusions

  1. 1.

    The eutectoid transformation β⇌α+ε occurs at 630°C in alloys of the Zr-Mo system.

     
  2. 2.

    In Zr-Mo alloys rich in zirconium, decomposition of the β phase occurs with formation of different structures in connection with changes in composition and cooling rate. One observes eutectoid decomposition with formation of a fine-grained eutectoid, oriented eutectoid decomposition with formation of an acicular structure, partial decomposition of β phase with formation of an acicular structure without precipitates of ε phase and considerable super-saturation of the α phase with molybdenum, and finally the cessation of β phase decomposition.

     
  3. 3.

    The heating rate has a substantial effect on the eutectoid transformation α+ε→β in Zr-Mo alloys.

     
  4. 4.

    By optimal alloying of zirconium with molybdenum (about 5%) and proper heat treatment (cooling from the β region with formation of a martensite-like structure without eutectoid decomposition) one can substantially increase the hardness of the Zr-Mo alloys.

     

Keywords

Zirconium Heat Treatment Molybdenum Cool Rate Phase Transformation 

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Literature cited

  1. 1.
    R. Domagala, D. Macpherson, and M. Hansen, J. Metals, 5(1), Section 1 (1953).Google Scholar
  2. 2.
    V. N. Svechnikov and A. Ts. Spektor, Phase Transformations, Republican Interdepartmental Collection [in Russian], Naukova Dumka, Kiev (1967).Google Scholar
  3. 3.
    V. N. Svechnikov et al., in: Problems of Physics of Metals and Metal Science, Vol. 16, Institute of Metal Physics of the Academy of Sciences UkrSSR [in Russian] (1962).Google Scholar

Copyright information

© Consultants Bureau 1969

Authors and Affiliations

  • V. N. Svechnikov
  • A. Ts. Spektor

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