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Destabilization of fcc stable materials during SPD under high pressure

Efros, Boris; Beygelzimer, Yakiv; Deryagin, Anatoly; Efros, Nataly; Pilyugin, Vitaly and Orlov, Dmitry (2004) Ultrafine Grained Materials III, 2004 In Ultrafine Grained Materials III p.401-404
Abstract

It was shown that of a fine α-phase was formed in the Hadfield steel after a cold plastic deformation to E = 50%. Nuclei of the ex-phase of deformed samples reduced the decomposition start temperature of the austenite by 180°C. Fine crystals of an α-phase nearly 30 nm in size, whose concentration was as high as ∼2.3%, were detected in a steel Fe 79.55Mn17Al3Co0.45 after a SPD to ε = 92%. A steel Fe61.2Cr18Mn20N 0.7C0.1 contained fine crystals of a strain-induced α-phase 20 nm in size after a low temperature plastic deformation. The α-phase, which was formed under the given conditions, had an extremely low Curie temperature TC =... (More)

It was shown that of a fine α-phase was formed in the Hadfield steel after a cold plastic deformation to E = 50%. Nuclei of the ex-phase of deformed samples reduced the decomposition start temperature of the austenite by 180°C. Fine crystals of an α-phase nearly 30 nm in size, whose concentration was as high as ∼2.3%, were detected in a steel Fe 79.55Mn17Al3Co0.45 after a SPD to ε = 92%. A steel Fe61.2Cr18Mn20N 0.7C0.1 contained fine crystals of a strain-induced α-phase 20 nm in size after a low temperature plastic deformation. The α-phase, which was formed under the given conditions, had an extremely low Curie temperature TC = 400°C. When the steel was strongly deformed (e ≈ 8) by SPD a strain-induced α-phase have a normal Curie temperature TC = 600°C. Thus, the obtained results indicate that SPD can result in a considerable destabilization of stable austenitic steels.

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author
publishing date
type
Chapter in Book/Report/Conference proceeding
publication status
published
subject
keywords
Magnetic properties, Severe plastic deformation, Stable austenitic steels, Structure
in
Ultrafine Grained Materials III
editor
Zhu, Y.T.; Langdon, T.G.; Valiev, R.Z.; Lee Semiatin, S.; et al, al; ; ; ; and
pages
4 pages
conference name
Ultrafine Grained Materials III, 2004
external identifiers
  • scopus:3042819564
ISBN
0873395719
language
English
LU publication?
no
id
78b55fef-50a4-45f5-821c-db395b4aeb61
date added to LUP
2016-06-20 15:45:34
date last changed
2017-04-20 12:45:11
@inproceedings{78b55fef-50a4-45f5-821c-db395b4aeb61,
  abstract     = {<p>It was shown that of a fine α-phase was formed in the Hadfield steel after a cold plastic deformation to E = 50%. Nuclei of the ex-phase of deformed samples reduced the decomposition start temperature of the austenite by 180°C. Fine crystals of an α-phase nearly 30 nm in size, whose concentration was as high as ∼2.3%, were detected in a steel Fe <sub>79.55</sub>Mn<sub>17</sub>Al<sub>3</sub>Co<sub>0.45</sub> after a SPD to ε = 92%. A steel Fe<sub>61.2</sub>Cr<sub>18</sub>Mn<sub>20</sub>N <sub>0.7</sub>C<sub>0.1</sub> contained fine crystals of a strain-induced α-phase 20 nm in size after a low temperature plastic deformation. The α-phase, which was formed under the given conditions, had an extremely low Curie temperature T<sub>C</sub> = 400°C. When the steel was strongly deformed (e ≈ 8) by SPD a strain-induced α-phase have a normal Curie temperature T<sub>C</sub> = 600°C. Thus, the obtained results indicate that SPD can result in a considerable destabilization of stable austenitic steels.</p>},
  author       = {Efros, Boris and Beygelzimer, Yakiv and Deryagin, Anatoly and Efros, Nataly and Pilyugin, Vitaly and Orlov, Dmitry},
  booktitle    = {Ultrafine Grained Materials III},
  editor       = {Zhu, Y.T. and Langdon, T.G. and Valiev, R.Z. and Lee Semiatin, S. and et al, al},
  isbn         = {0873395719},
  keyword      = {Magnetic properties,Severe plastic deformation,Stable austenitic steels,Structure},
  language     = {eng},
  pages        = {401--404},
  title        = {Destabilization of fcc stable materials during SPD under high pressure},
  year         = {2004},
}