Solid-state mechanical synthesis of austenitic Fe-Ni-Cr-N alloys

The possibility of producing high-nitrogen nanostructured austenitic Fe-Ni-Cr-N alloys using solid-state mechanical synthesis in a ball mill has been studied. It has been shown that, in the matrices of iron and Fe- x Ni ( x = 6–20 at %) alloys with chromium nitrides, bcc and fcc Fe-Ni-Cr-N solid sol...

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Bibliographic Details
Published in:Physics of metals and metallography 2014-04, Vol.115 (4), p.392-402
Main Authors: Shabashov, V. A., Kozlov, K. A., Lyashkov, K. A., Kataeva, N. V., Litvinov, A. V., Sagaradze, V. V., Zamatovskii, A. E.
Format: Article
Language:English
Subjects:
Alloys
Chemistry and Materials Science
Chromium nitride
Diffusion
Ferrous alloys
Iron
Materials Science
Metallic Materials
Nanostructure
Nitrides
Phase Transformations
Precipitation (Meteorology)
Solid solutions
Specialty metals industry
Structure
Synthesis
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Summary:The possibility of producing high-nitrogen nanostructured austenitic Fe-Ni-Cr-N alloys using solid-state mechanical synthesis in a ball mill has been studied. It has been shown that, in the matrices of iron and Fe- x Ni ( x = 6–20 at %) alloys with chromium nitrides, bcc and fcc Fe-Ni-Cr-N solid solutions are formed. With an increase in the concentration of nickel in the matrix, the amount of mechanically synthesized austenite grows. The subsequent heating of the mechanically synthesized specimens into the austenitic field of the phase diagram of Fe-Ni alloys leads to the α → γ transformation with the retention of the nanostructured Fe-Ni-Cr-N solid solution and precipitation of secondary nitrides CrN, which stabilize the structure.
ISSN:0031-918X
1555-6190
DOI:10.1134/S0031918X14040140