Název:
CARBON DIFFUSION IN CARBON-SUPERSATURATED 9CR-1MO STEEL: ANOMALOUS TEMPERATURE DEPENDENCE OF CARBON DIFFUSIVITY
Autoři:
Čermák, Jiří ; Král, Lubomír Typ dokumentu: Příspěvky z konference Konference/Akce: Metal 2014. International Conference on Metallurgy and Materials /23./, Brno (CZ), 2014-05-21 / 2014-05-23
Rok:
2014
Jazyk:
eng
Abstrakt: Carbon diffusion was studied in temperature interval 573 - 1073 K in carbon-supersaturated surface layer of 9Cr–1Mo steel P91 and in model Fe-15Cr binary alloy. Extremely low carbon diffusion coefficient D (by 3 orders of magnitude lower than the value D eq in material with equilibrium carbon concentration) was observed in carburized surface region of Fe-15Cr. Similar results were obtained for P91 above the temperature T n ~ 800 K. However, below T n , the values of D measured in P91 increased and approached the value of D eq . It seems that the non-Arrhenius behaviour of P91 steel around T n may be ascribed to the α → α + α’ phase decomposition. Possible effect of nitrogen upon the low-temperature increase in D in P91 steel was excluded.
Klíčová slova:
Carbon; Carbon-supersaturation; Cr-Mo steels; Diffusion; phase decomposition Číslo projektu: GAP108/11/0148 (CEP), ED1.1.00/02.0068 Poskytovatel projektu: GA ČR, GA MŠk Zdrojový dokument: METAL 2014: 23rd International Conference on Metallurgy and Materials, ISBN 978-80-87294-52-9 Poznámka: Související webová stránka: http://www.metal2014.com/cz/zobrazit-seznam-prispevku/2498-carbon-diffusion-in-carbon-supersaturated-9cr-1mo-steel-anomalous-temperature-dependence-of-carbon-diffusivity/
Instituce: Ústav fyziky materiálů AV ČR
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Informace o dostupnosti dokumentu:
Dokument je dostupný v příslušném ústavu Akademie věd ČR. Původní záznam: http://hdl.handle.net/11104/0236593