Initiation of LME crack in ferritic martensitic steel in liquid lead-bismuth

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F26722445%3A_____%2F18%3AN0000028" target="_blank" >RIV/26722445:_____/18:N0000028 - isvavai.cz</a>

Výsledek na webu

<a href="https://www.sciencedirect.com/science/article/pii/S002231151830895X" target="_blank" >https://www.sciencedirect.com/science/article/pii/S002231151830895X</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.jnucmat.2018.09.033" target="_blank" >10.1016/j.jnucmat.2018.09.033</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Initiation of LME crack in ferritic martensitic steel in liquid lead-bismuth

Popis výsledku v původním jazyce

This work is aimed at fundamental understanding of the T91 steel cracking mechanisms in liquid PbBi eutectic. In particular, the crack initiation was studied by means of Constant Extension Rate Tensile (CERT) tests with flat tapered specimens in PbBi at 300 degrees C with oxygen content 3 x 10(-7) - 6 x 10(-6) wt. % and in air, up to rupture and maximum load. The tapered specimens were meant to create a uniform variation of stress along the gauge length and the threshold stress of the crack initiation was determined. The performance of the steel was affected by the environment. The threshold stress decreased and cracking character changed in PbBi when compared to the testing in air. Post-test examinations carrying out with SEM equipped with FIB found shallow cracks from broken oxide having ductile propagation and a grain-size-deep crack of inter-lath martensite path in the plastic strain region. The cracking stress-strain conditions and the role of oxide rupture causing wetting, as the cracking precursors, are discussed.

Název v anglickém jazyce

Initiation of LME crack in ferritic martensitic steel in liquid lead-bismuth

Popis výsledku anglicky

This work is aimed at fundamental understanding of the T91 steel cracking mechanisms in liquid PbBi eutectic. In particular, the crack initiation was studied by means of Constant Extension Rate Tensile (CERT) tests with flat tapered specimens in PbBi at 300 degrees C with oxygen content 3 x 10(-7) - 6 x 10(-6) wt. % and in air, up to rupture and maximum load. The tapered specimens were meant to create a uniform variation of stress along the gauge length and the threshold stress of the crack initiation was determined. The performance of the steel was affected by the environment. The threshold stress decreased and cracking character changed in PbBi when compared to the testing in air. Post-test examinations carrying out with SEM equipped with FIB found shallow cracks from broken oxide having ductile propagation and a grain-size-deep crack of inter-lath martensite path in the plastic strain region. The cracking stress-strain conditions and the role of oxide rupture causing wetting, as the cracking precursors, are discussed.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

20501 - Materials engineering

Projekt

Výsledek vznikl pri realizaci vícero projektů. Více informací v záložce Projekty.

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)<br>I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2018

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Journal of Nuclear Materials

ISSN

0022-3115

e-ISSN

1873-4820

Svazek periodika

511

Číslo periodika v rámci svazku

December

Stát vydavatele periodika

NL - Nizozemsko

Počet stran výsledku

14

Strana od-do

549-472

Kód UT WoS článku

000447796300046

EID výsledku v databázi Scopus

2-s2.0-85054293378