Embrittlement of a martensitic steel by liquid lead

Legris, Alexandre; Nicaise, G.; Vogt, Jean; Foct, J.; Gorse, D.; Vancon, Dominique

doi:10.1016/s1359-6462(00)00523-6

Cited by 55 publications

(28 citation statements)

References 4 publications

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“…Nevertheless, it demonstrates that brittle cracking can occur at the test temperature provided direct contact is obtained with the liquid metal. We can then infer that LME for martensitic steel does not require specific metallurgical conditions as opposed to previous statement [2][3][4]. The notch used in previous studies certainly helps by promoting higher tensile stresses to be reached and concentrating deformation at the surface region.…”

Section: Resultsmentioning

confidence: 71%

“…Previous LME studies on 91 grade steels with Pb or Pb-Bi concluded that the mechanical behaviour is not affected in its standard metallurgical state but it becomes notch sensitive in this environment after a hardening heat treatment consisting of a low temperature tempering treatment [2,3]. In the hardened state, the rupture mode was interpreted with the model of reduction of surface energy induced by the liquid metal adsorption [4].…”

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confidence: 99%

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Liquid metal embrittlement susceptibility of T91 steel by lead?bismuth

Auger

Lorang

2005

Scripta Materialia

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To cite this version:Thierry Auger, Gérard Lorang. Liquid metal embrittlement susceptibility of T91 steel by LeadBismuth. submitted to Scripta Materialia. 2004. Liquid metal embrittlement susceptibility of T91 steel by Lead-Bismuth Previous studies on T91 steel in its standard metallurgical state do not provide evidence for Liquid Metal Embrittlement (LME) by eutectic Pb-Bi. In this paper, we show that this steel can be embrittled by Pb-Bi when direct contact between the steel and the liquid metal is obtained by prior ion beam sputtering of the native oxidized film.Introduction:

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Section: Resultsmentioning

confidence: 71%

mentioning

confidence: 99%

Liquid metal embrittlement susceptibility of T91 steel by lead?bismuth

Auger

Lorang

2005

Scripta Materialia

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“…Despite the fact that many interpretations of LME have been formulated [5][6][7][8][9][10], the prediction of its occurrence remains problematic. Moreover the concept of specificity of the solid metal-liquid metal couple has been questioned by several authors [5,12,13] and various parameters such as metallurgical state, surface state, composition, solubility, temperature, strain rate, stress concentrators, etc. are known to influence the risk of LME [14][15][16].…”

Section: Introductionmentioning

confidence: 99%

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

Bosch¹,

Bosch²,

Sapundjiev³

et al. 2008

Journal of Nuclear Materials

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The susceptibility of the ferritic-martensitic steels T91 and EUROFER97 to liquid metal embrittlement (LME) in lead alloys has been examined under various conditions. T91, which is currently the most promising candidate material for the high temperature components of the future accelerator driven system (ADS) was tested in liquid lead bismuth eutectic (LBE), whereas the reduced activation steel, EUROFER97 which is under consideration to be the structural steel for fusion reactors was tested in liquid lead lithium eutectic. These steels, similar in microstructure and mechanical properties in the unirradiated condition were tested for their susceptibility to LME as function of temperature (150-450°C) and strain rate (1 Â 10 À3 -1 Â 10 À6 s À1 ). Also, the influence of pre-exposure and surface stress concentrators was evaluated for both steels in, respectively, liquid PbBi and PbLi environment. To assess the LME effect, results of the tests in liquid metal environment are compared with tests in air or inert gas environment. Although both unirradiated and irradiated smooth ferritic-martensitic steels do not show any or little deterioration of mechanical properties in liquid lead alloy environment compared to their mechanical properties in gas as function of temperature and strain rate, pre-exposure or the presence of surface stress concentrators does lead to a significant decrease in total elongation for certain test conditions depending on the type of liquid metal environment. The results are discussed in terms of wetting enhanced by liquid metal corrosion or crack initiation processes.

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“…3. Increased hardness of the T91 base material obtained by reducing the tempering temperature is known to increase the susceptibility of T91 steel to LME [12][13][14].…”

Section: T91/316l Tig Weldmentioning

confidence: 99%