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Microstructure of a plastically deformed Fe−Ni alloy at 20–500°C

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Metal Science and Heat Treatment Aims and scope

Conclusions

  1. 1.

    We established relationships between the initiation and development of strain microrelief in an iron-nickel alloy (ni+Fe=98.4%) at 20−500°; and elongation rate of 105%\h.

    Intragranular shear processes develop intensively up to and including 400°, with a large number of slip traces in the grains. At 500° shear processes within the grains are partially prevented by the development of intergranular deformation, which is manifest in the corresponding microrelief of the grain boundaries.

  2. 2.

    The deformation mechanism of the alloy investigated undergoes a fundamental change at 500° due to the intensive deformation processes in the grain boundaries.

  3. 3.

    The Fe-Ni alloy should be rolled with small deformation in each pass to prevent heating of the material (to 500°) in the contact area, since this may result in cracking. The highest temperature in the contact area of the pipe should not exceed 400°.

    This procedure has been adopted at the Pervoural'skii Novotrubnyi Plant.

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Literature cited

  1. M. G. Lozinskii, Structure and Properties of Metals and Alloys at High Temperatures [in Russian], Metallurgizdat, Moscow (1963).

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  2. V. L. Kolmogorov et al., Utilization of the Reserve Plasticity of Metal in the Production of Cold-Worked Pipe [in Russian], Izd. NTO Chernoi Metallurgii, Sverdlovsk (1966).

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  3. M. G. Lozinskii and N. Z. Pertsovskii, Izv. Akad. Nauk SSSR, OTN Metallurgiya i Toplivo, No. 1 (1961).

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  7. M. G. Lozinskii and N. Z. Pertsovskii, Izv. Akad. Nauk SSSR. OTN. Metallurgiya i Toplivo, No. 1 (1962).

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Authors
  1. M. G. Lozinskii
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  2. É. O. Kornienko
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Additional information

Translated from Metallovedenie i Termicheskaya Obrabotka Metallov, No. 1, pp. 77–80, January, 1971.

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Lozinskii, M.G., Kornienko, É.O. Microstructure of a plastically deformed Fe−Ni alloy at 20–500°C. Met Sci Heat Treat 13, 85–88 (1971). https://doi.org/10.1007/BF00663790

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  • DOI: https://doi.org/10.1007/BF00663790

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