Behaviour of pre-stressed T91 and ODS steels exposed to liquid lead-bismuth eutectic

0491309 - ÚFM 2019 RIV GB eng J - Journal Article
Hojná, A. - Hadraba, Hynek - Di Gabriele, F. - Husák, Roman
Behaviour of pre-stressed T91 and ODS steels exposed to liquid lead-bismuth eutectic.
Corrosion Science. Roč. 131, FEB (2018), s. 264-277. ISSN 0010-938X. E-ISSN 1879-0496
R&D Projects: GA MŠMT(CZ) LQ1601; GA ČR(CZ) GA14-25246S
Institutional support: RVO:68081723
Keywords : martensitic steel * oxidation mechanism * corrosion behavior * Liquid metal embrittlement
OECD category: Materials engineering
Impact factor: 6.355, year: 2018

Structural materials compatibility in conditions relevant to plant operation is of primary importance to safety. The work describes the behaviour of T91 and ferritic ODS steels, 14%Cr and 19%Cr under such conditions. Three-point-bend specimens were pre-stressed up to yield strength, then exposed to flowing lead-bismuth eutectic in a loop at 350 degrees C for 500 and 1000 h, in non-flowing one for 2000 h. The oxygen content was measured to be in the order of 10(-5) wt.%. Post-test examination by means of microhardness and SEM with EDS demonstrated the formation of thin oxides without crack initiation, which is discussed. Because it was not observed either direct contact between the steels and LBE or local high plastic deformation, no LME occurred.
Permanent Link: http://hdl.handle.net/11104/0286987