Publication detail
Influence of microstructure on impact properties of 9–18%Cr ODS steels for fusion/fission applications
HADRABA, H. FOURNIER, B. STRATIL, L. MALAPLATE, J. ROUFIÉ, A. WIDENT, P. ZIOLEK, L. BÉCHADE, J.
Czech title
Vliv mikrostruktury na nárazové vlastnosti 9-18%Cr ODS ocelí pro fúzní/štěpné aplikace
English title
Influence of microstructure on impact properties of 9–18%Cr ODS steels for fusion/fission applications
Type
journal article - other
Language
en
Original abstract
The paper describes the influence of the microstructure of (9–18%)Cr–W–Ti–Y2O3 ODS steels on their impact fracture properties. The extrusion shape plays a major role on the impact properties, materials extruded as a rod present a higher upper shelf energy (USE) and a lower ductile to brittle transition temperature (DBTT) compared to materials extruded as plates. The DBTT for the non-recrystallized 14%Cr ferritic steels was shifted towards higher temperatures compared to the 9%Cr tempered ferritic–martensitic steel. Increasing the W and Ti content in 9%Cr tempered ferritic–martensitic ODS steel leads to a USE and a DBTT shifted towards higher energies and higher temperatures, respectively. Increasing the yttria content leads to a drop of the impact energy and a shift of the DBTT of ferritic ODS steel towards higher temperatures. The present study highlights extensive splitting of the fracture surfaces and a dependency of the impact energy on the fracture plane orientation according to the microstructure anisotropy.
Czech abstract
Článek popisuje vliv mikrostruktury 9-18% Cr-W-Ti-Y2O3 ODS ocelí na jejich nárazové lomové chování. Extrudovaný tvar má zásadní vliv na nárazové vlastnosti, materiál extrudovaný jako tyč vykazuje vyšší horní prahovou energii (USE) a nižší teplotu přechodu tvárného a štěpného lomu (DBTT) ve srovnání s materiálem extrudovaným ve tvaru plechu. Teplota DBTT pro nerekrystalizovanou strukturu 14%Cr feritických ocelí byla posunuta směrem k vyšším teplotám v porovnání s 9%Cr oceli se strukturou popuštěného feritu a martenzitu. Zvyšování obsahu W a Ti v 9%Cr ocelí s popuštěnou strukturou feritu a martenzitu ODS ocelí vede k posunu USE a DBTT směrem k vyšším energiím a teplotám, respektive. Pro feritické ODS oceli vede zvyšování obsahu ytria k poklesu nárazové práce a k posunu DBTT k vyšším teplotám. Nynější studie poukazuje na rozsáhlé oddělování lomových ploch a závislost nárazové práce na orientaci lomové roviny v závislosti na anizotropii mikrostruktury.
English abstract
The paper describes the influence of the microstructure of (9–18%)Cr–W–Ti–Y2O3 ODS steels on their impact fracture properties. The extrusion shape plays a major role on the impact properties, materials extruded as a rod present a higher upper shelf energy (USE) and a lower ductile to brittle transition temperature (DBTT) compared to materials extruded as plates. The DBTT for the non-recrystallized 14%Cr ferritic steels was shifted towards higher temperatures compared to the 9%Cr tempered ferritic–martensitic steel. Increasing the W and Ti content in 9%Cr tempered ferritic–martensitic ODS steel leads to a USE and a DBTT shifted towards higher energies and higher temperatures, respectively. Increasing the yttria content leads to a drop of the impact energy and a shift of the DBTT of ferritic ODS steel towards higher temperatures. The present study highlights extensive splitting of the fracture surfaces and a dependency of the impact energy on the fracture plane orientation according to the microstructure anisotropy.
Keywords in Czech
ODS oceli, KLST, nárazové chování, anizotropie
Keywords in English
ODS steels, KLST, impact behaviour, anisotropy
RIV year
2011
Released
01.04.2011
ISSN
0022-3115
Volume
411
Number
1-3
Pages from–to
112–118
Pages count
7
BIBTEX
@article{BUT75999,
author="Hynek {Hadraba} and Luděk {Stratil},
title="Influence of microstructure on impact properties of 9–18%Cr ODS steels for fusion/fission applications",
year="2011",
volume="411",
number="1-3",
month="April",
pages="112--118",
issn="0022-3115"
}