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Inorganic Materials: Applied Research

, Volume 3, Issue 2, pp 102–106 | Cite as

Investigation of fine atomic structure of low-activation chromium steel using Mössbauer spectroscopy and calorimetry within the temperature range of ductile-to-brittle transition

  • N. V. Boiko
  • Yu. N. Devyatko
  • I. A. Evstyukhina
  • O. N. Izmailov
  • S. G. Rudakov
  • M. N. Smirnov
Materials for Aerospace Engineering

Abstract

Using Mössbauer spectroscopy on 57Fe nuclei within the range of ductile-to-brittle transition temperatures, a change in the force constants is revealed mainly in the iron environment with a single atom of chromium in the ferritic-martensitic 12% chromium steel EK181, and anomalies are also detected in behavior of the effective magnetic fields and the 3d-electron density on the iron nuclei. It is shown that the partial Debye temperature for an iron environment with a single atom of chromium lies within the ductile-to-brittle transition temperature range. From calorimetric measurements of the internal energy of steel, an anomaly in the behavior of the heat capacity is found, which disappears after thermocycling (from −140 to 40°C) and reappears after annealing at 550°C.

Keywords

low-activation ferritic-martensitic 12% chromium steels ductile-to-brittle transition temperature Mössbauer spectroscopy differential scanning calorimetry 

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Copyright information

© Pleiades Publishing, Ltd. 2012

Authors and Affiliations

  • N. V. Boiko
    • 1
  • Yu. N. Devyatko
    • 1
  • I. A. Evstyukhina
    • 1
  • O. N. Izmailov
    • 1
  • S. G. Rudakov
    • 1
  • M. N. Smirnov
    • 1
  1. 1.National Research Nuclear University MEPhIMoscowRussia

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