Liquid metal embrittlement of 12Cr ferritic/martensitic steel thin-walled tubes exposed to liquid lead-bismuth eutectic

2021 ◽  
pp. 110024
Author(s):  
Hao Wang ◽  
Xing Gong ◽  
Jun Xiao ◽  
Linjiang Chai ◽  
Zhiyang Yu ◽  
...  
Keyword(s):  
Liquid Metal ◽  
Martensitic Steel ◽  
Liquid Metal Embrittlement ◽  
Liquid Lead ◽  
Thin Walled ◽  
Lead Bismuth Eutectic

Corrosion-Mechanical Behavior of T91 and 14-19Cr ODS Steels Exposed to Flowing Lead-Bismuth

2016 ◽  
Vol 258 ◽  
pp. 627-630 ◽  
Author(s):  
Anna Hojna ◽  
Hynek Hadraba ◽  
Fosca di Gabriele ◽  
Roman Husak ◽  
Ivo Kuběna ◽  
...  
Keyword(s):  
Liquid Metal ◽  
Crack Initiation ◽  
Mechanical Alloying ◽  
Mechanical Behavior ◽  
Martensitic Steel ◽  
Liquid Metal Embrittlement ◽  
Liquid Lead ◽  
Oxide Layers ◽  
Ods Steels

This work describes the behavior of T91 (9Cr ferritic-martensitic steel), MA957 ODS (14%Cr, 0.3Mo, 0.9Ti, 0.25%Y2O3) and PM2000 ODS (19%Cr, 5%Al, 0.25%Y2O3) steels produced by mechanical alloying process, after long-term exposure to liquid lead-bismuth eutectic. Small bend specimens were pre-strained, then exposed to flowing lead-bismuth at 350°C for 100, 500 and 1000 hours. After exposure, the specimens were examined by using SEM equipped with EDX. The resulting changes of surface and built-up oxide layers are discussed. Liquid Metal Embrittlement, LME, crack initiation was not observed in the specimens. The absence of LME in these conditions is discussed.

scholarly journals Liquid metal embrittlement susceptibility of ferritic–martensitic steel in liquid lead alloys

2008 ◽  
Vol 376 (3) ◽  
pp. 322-329 ◽  
Author(s):  
J. Van den Bosch ◽  
R.W. Bosch ◽  
D. Sapundjiev ◽  
A. Almazouzi
Keyword(s):  
Liquid Metal ◽  
Martensitic Steel ◽  
Liquid Metal Embrittlement ◽  
Liquid Lead ◽  
Lead Alloys

scholarly journals Microstructural Investigation of LME Crack Initiated in Ferritic/Martensitic Steel T91 Loaded in Liquid Lead-Bismuth Eutectic at 300 °C

Materials ◽  
2018 ◽  
Vol 12 (1) ◽  
pp. 38
Author(s):  
Patricie Halodová ◽  
Jan Lorinčík ◽  
Anna Hojná
Keyword(s):  
Liquid Metal ◽  
Martensitic Steel ◽  
Ion Beam ◽  
Mechanical Strain ◽  
Metal Corrosion ◽  
Liquid Lead ◽  
Extension Rate ◽  
Irradiation Embrittlement ◽  
Microstructural Investigation ◽  
Lead Bismuth Eutectic

Liquid lead-bismuth eutectic (LBE) is one of the candidate materials for advanced nuclear systems. The structural materials used in contact with LBE are selected according to the resistance to liquid metal corrosion, irradiation embrittlement, and compatibility with the coolant. However, simultaneous presence of mechanical strain and LBE environment can induce liquid metal embrittlement (LME) in these materials. In this study, a specimen from candidate ferritic-martensitic steel T91 was tested by Constant Extension Rate Tensile (CERT) test exposed to PbBi environment with oxygen concentration 6 × 10−6 wt % at 300 °C up to rupture. Post-test examination using scanning electron microscopy (SEM) showed a deep crack indicating features of LME in the plastic strained region of the tested specimen. Further investigations focused on characterization of the fracture path and microstructure determination using focused ion beam (FIB) and energy dispersive X-ray spectrometry/electron backscatter diffraction (EDX/EBSD). This observation revealed that the dominant LME failure mode of the observed crack is translath or transgranular and the crack stopped at the high-angle grain boundary. The role of oxides in the crack initiation is discussed.

Character of Liquid Metal Embrittlement of the Steel T91 in Contact With Lead-Bismuth Eutectic

2014 ◽  
Author(s):  
Anna Hojna ◽  
Fosca Di Gabriele ◽  
Jakub Klecka
Keyword(s):  
Fracture Toughness ◽  
Fracture Surface ◽  
Liquid Metal ◽  
Fracture Resistance ◽  
Martensitic Steel ◽  
Liquid Metal Embrittlement ◽  
Resistance Evaluation ◽  
The Past ◽  
Lead Bismuth Eutectic

This work summarizes results of the work carried out in CVR (Centrum výzkumu Rez) on the evaluation of the susceptibility to LME (Liquid Metal Ebrittlement) of the ferritic/martensitic steel T91 in contact with LBE (Lead-Bismuth Eutectic) at 300 and 350°C. The work, carried out in the past few years, through tensile and fracture toughness tests, revealed a marked sensitivity to embrittlement for the T91 in contact with LBE. Tests were carried out in well defined conditions and according to ASTM standards. It was observed that the LBE decreased the fracture toughness, JIC, by more than 30%, compared to the value in air. The results are discussed based on examinations of the fracture surface evidencing LME occurrence. The fracture toughness measured in LBE is proposed to be the appropriate value for fracture resistance evaluation, applied to extension of a pre-existing LME crack.

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