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  Tempering behavior of a low nitrogen boron-added 9%Cr steel

Fedorova, I., Kostka, A., Tkachev, E., Belyakov, A., & Kaibyshev, R. (2016). Tempering behavior of a low nitrogen boron-added 9%Cr steel. Materials Science and Engineering A: Structural Materials Properties Microstructure and Processing, 662, 443-455. doi:10.1016/j.msea.2016.03.092.

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Fedorova, Irina1, 2, Autor           
Kostka, Aleksander3, 4, Autor           
Tkachev, E.5, Autor           
Belyakov, Andrey5, Autor           
Kaibyshev, Rustam2, Autor           
Affiliations:
1Microstructure Physics and Alloy Design, Max-Planck-Institut für Eisenforschung GmbH, Max Planck Society, ou_1863381              
2Belgorod State University, 308015 Belgorod, Russia, persistent22              
3Center for Interface-Dominated High Performance Materials (ZGH), Ruhr-Universität Bochum, 44780 Bochum, Germany, persistent22              
4High-Temperature Materials, External Max Planck Fellow, Max-Planck-Institut für Eisenforschung GmbH, Max Planck Society, ou_1863347              
5Belgorod State University, Belgorod, Russia, persistent22              

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Schlagwörter: Carbides; Electron microscopy; Fracture; Martensitic steel; Martensitic transformations; Mechanical properties; Nitrogen; Phase transitions; Precipitation (chemical); Temperature, After high temperature; Creep resistant steels; High angle boundaries; Low temperature tempering; Mechanical characterizations; Microstructure and mechanical properties; Tempered martensite; Three-phase separation, Tempering
 Zusammenfassung: The effect of tempering temperature on microstructure and mechanical properties was studied in a low-nitrogen, high-boron, 9Cr steel. After normalizing and low-temperature tempering, cementite platelets precipitated within the martensitic matrix. This phase transformation has no distinct effect on mechanical properties. After tempering at 500 °C, M23C6 carbides appeared in the form of layers and particles with irregular shapes along the high-angle boundaries. Approximately, 6 of the retained austenite was observed after normalizing, which reduced to 2 after tempering at 550 °C. This is accompanied by reduction in toughness from 40 J/cm2 to 8.5 J/cm2. Further increase of the tempering temperature led to spheroidization and coagulation of M23C6 particles that is followed by a significant increase in toughness to 250 J/cm2 at 750 °C. Three-phase separations of M(C,N) carbonitrides to particles enriched with V, Nb and Ti were detected after high-temperature tempering. © 2016 Elsevier B.V.

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Sprache(n): eng - English
 Datum: 2016-04-26
 Publikationsstatus: Erschienen
 Seiten: -
 Ort, Verlag, Ausgabe: -
 Inhaltsverzeichnis: -
 Art der Begutachtung: Expertenbegutachtung
 Identifikatoren: DOI: 10.1016/j.msea.2016.03.092
BibTex Citekey: Fedorova2016443
 Art des Abschluß: -

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Titel: Materials Science and Engineering A: Structural Materials Properties Microstructure and Processing
  Kurztitel : Mater. Sci. Eng. A: Struct. Mater. Prop. Microstruct. Process.
Genre der Quelle: Zeitschrift
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Ort, Verlag, Ausgabe: New York, NY : Elsevier
Seiten: - Band / Heft: 662 Artikelnummer: - Start- / Endseite: 443 - 455 Identifikator: ISSN: 0921-5093
CoNE: https://pure.mpg.de/cone/journals/resource/954928498465_1