Fracture toughness assessment of ferritic–martensitic steel in liquid lead–bismuth eutectic

2009 ◽  
Vol 385 (2) ◽  
pp. 250-257 ◽  
Author(s):  
J. Van den Bosch ◽  
G. Coen ◽  
A. Almazouzi ◽  
J. Degrieck
Keyword(s):  
Fracture Toughness ◽  
Martensitic Steel ◽  
Liquid Lead ◽  
Lead Bismuth Eutectic

Factors Promoting Embrittlement of T91 Steel in Liquid Lead-Bismuth Eutectic Alloy

2013 ◽  
Author(s):  
Changqing Ye ◽  
Jean-Bernard Vogt ◽  
Ingrid Proriol-Serre
Keyword(s):  
Loading Rate ◽  
Martensitic Steel ◽  
Inert Atmosphere ◽  
Heat Treatment Condition ◽  
Ductile Material ◽  
Liquid Lead ◽  
Low Oxygen ◽  
Test Technique ◽  
Punch Test ◽  
Lead Bismuth Eutectic

The mechanical behavior of the T91 martensitic steel has been studied in liquid lead-bismuth eutectic (LBE) and in inert atmosphere. Several conditions were considered to point out the most sensitive embrittling factor. The Small Punch Test technique has been employed by using smooth specimens. T91 appeared in general as a ductile material, and became brittle in the considered conditions only at least, but not necessarily, if the test was performed in LBE. It turns out that the loading rate appeared as a critical parameter for the occurrence of liquid metal embrittlement of T91 in LBE. For standard heat treatment condition, loading the T91 very slowly instead of rapidly in low oxygen LBE resulted in brittle fracture.

The effects of stress on corrosion behavior of SIMP martensitic steel in static liquid lead-bismuth eutectic

2021 ◽  
Vol 187 ◽  
pp. 109477
Author(s):  
Bingsheng Li ◽  
Qing Liao ◽  
Hongpeng Zhang ◽  
Tielong Shen ◽  
Fangfang Ge ◽  
...  
Keyword(s):  
Corrosion Behavior ◽  
Martensitic Steel ◽  
Liquid Lead ◽  
Lead Bismuth Eutectic ◽  
Effects Of Stress

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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