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Wetting by liquid sodium and fracture path analysis of sodium induced embrittlement of 304L stainless steel

Published online by Cambridge University Press:  27 November 2017

Bassem Barkia ,
Thierry Auger ,
Jean-Louis Courouau  and
Julie Bourgon
Bassem Barkia
Affiliation:
Laboratoire de Mécanique des Sols, Structures et Matériaux, CentraleSupélec, UMR CNRS 8579, Université Paris-Saclay, Chatenay-Malabry 92295, France
Thierry Auger*
Affiliation:
Laboratoire de Mécanique des Sols, Structures et Matériaux, CentraleSupélec, UMR CNRS 8579, Université Paris-Saclay, Chatenay-Malabry 92295, France; and Laboratoire PIMM, ENSAM–CNRS–CNAM, UMR CNRS 8006, Paris 75013, France
Jean-Louis Courouau
Affiliation:
Den-Service de La Corrosion et du Comportement des Matériaux dans Leur Environnement (SCCME), CEA-Saclay, Université Paris-Saclay, Gif-sur-Yvette F-91191, France
Julie Bourgon
Affiliation:
Institut de Chimie et des Matériaux Paris-Est, UMR 7182, CNRS/UPEC, Thiais 94320, France
*
a)Address all correspondence to this author. e-mail: thierry.auger@ensam.eu
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Abstract

The wettability of the 304L steel is an important parameter in Liquid Metal Embrittlement studies. Empirically, it is found to be greatly enhanced by pre-exposure to oxygenated liquid sodium. The corrosion interface formed during exposure to sodium has been analyzed at the nanoscale by transmission electron microscopy using the focused ion beam sampling. A thin layer of sodium chromite (NaxCrO2 with x ≤ 1) is detected at the interface validating wetting on an oxide mechanism for the enhanced wetting after pre-exposure. Fracture micromechanisms and the crack path of liquid sodium-embrittled austenitic steel 304L at 573 K have been investigated down to the nanoscale. High-resolution orientation mapping analyses immediately below the fracture surface show that abundant martensitic transformations (γ → α) and twinning occur during deformation of austenite. The preferential crack path is intergranular along the newly formed γ/γ interfaces. It is concluded that these transformations play a major role in the fracture process.

Keywords

phase transformationgrain boundariesembrittlement
Type
Invited Paper
Information
Journal of Materials Research , Volume 33 , Issue 2 , 29 January 2018 , pp. 121 - 129
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Copyright
Copyright © Materials Research Society 2017 

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Footnotes

Contributing Editor: Jürgen Eckert

References

REFERENCES

Fazio, C., ed. Handbook on Lead-Bismuth Eutectic Alloy and Lead Properties, Materials Compatibility, Thermal-Hydraulics and Technologies, 2015 ed. (OECD-NEA, Issy-les-Moulineaux, France, 2015).Google Scholar
Hémery, S., Auger, T., Courouau, J.L., and Balbaud-Célérier, F.: Effect of oxygen on liquid sodium embrittlement of T91 martensitic steel. Corros. Sci. 76, 441 (2013).CrossRefGoogle Scholar
Bhat, N.P. and Borgstedt, H.U.: Corrosion behavior of structural materials in sodium influenced by formation of ternary oxides. Mater. Corros. 39, 115 (1988).Google Scholar
Longson, B. and Prescott, J.: Some experiments on the wetting of stainless steel, nickel and iron in liquid sodium. In Liquid Alkali Metals: Proceedings of an International Conference Organized by the British Nuclear Energy Society (Edited by the British Nuclear Energy Society, London, published by Thomas Telfard Limited, Nottingham University, U.K. 1973); pp. 171–176.Google Scholar
Hémery, S., Auger, T., Courouau, J.L., and Balbaud-Célérier, F.: Liquid metal embrittlement of an austenitic stainless steel in liquid sodium. Corros. Sci. 83, 1 (2014).Google Scholar
Courouau, J.L., Balbaud-Célérier, F., Lorentz, V., and Dufrenoy, T.: Corrosion by liquid sodium of materials for sodium fast reactors: The CORRONa testing device. In International Congress on Advances in Nuclear Power Plants 2011 (Edited by the Société Française d'Energie Nucléaire, Paris, France, 2011); p. 11152 (available at https://inis.iaea.org/search/search.aspx?orig_q=RN:44092769).Google Scholar
Rauch, E.F., Véron, M., Portillo, J., Bultreys, D., Maniette, Y., and Nicolopoulos, S.: Automatic crystal orientation and phase mapping in TEM by precession diffraction. Microsc. Anal. 22, S5 (2008).Google Scholar
Moberly, J.W., Barlow, M., Garrison, M.C., and Planting, P.J.: Electron microscope observations of liquid sodium interaction with 304 stainless steel. J. Nucl. Mater. 29, 223 (1969).Google Scholar
Lorang, G., da Cunha Belo, M., Simões, A.M.P., and Ferreira, M.G.S.: Chemical composition of passive films on AISI 304 stainless steel. J. Electrochem. Soc. 141, 3347 (1994).CrossRefGoogle Scholar
Hodkin, E.N. and Nicholas, M.G.: The Wetting of Cladding Materials and Other Materials and Alloys by Sodium; AERE–R7406, May, 1976.Google Scholar
Braconnier, J.J., Delmas, C., and Hagenmuller, P.: Etude par désintercalation électrochimique des systèmes Na x CrO2 et Na x NiO2 . Mater. Res. Bull. 17, 993 (1982).Google Scholar
Cavell, I.W. and Nicholas, M.G.: Some observations concerned with the formation of sodium chromite on AISI 316 exposed to oxygenated sodium. J. Nucl. Mater. 95, 129 (1980).Google Scholar
Eustathopoulos, N. and Drevet, B.: Interfacial bonding, wettability and reactivity in metal/oxide systems. J. Phys. III 4, 1865 (1994).Google Scholar
James, L.A. and Knecht, R.L.: Fatigue-crack propagation behavior of type 304 stainless steel in a liquid sodium environment. Metall. Trans. A 6, 109 (1975).CrossRefGoogle Scholar
Abe, H. and Shimoyashiki, S.: Time dependent crack growth of type 304 stainless steel in elevated temperature sodium. Eng. Fract. Mech. 26, 657 (1987).Google Scholar
Das, A. and Tarafder, S.: Experimental investigation on martensitic transformation and fracture morphologies of austenitic stainless steel. Int. J. Plast. 25, 2222 (2009).Google Scholar
Reid, C.N.: The association of twinning and fracture in bcc metals. Metall. Trans. A 12, 371 (1981).Google Scholar
Martin, M.L., Fenske, J.A., Liu, G.S., Sofronis, P., and Robertson, I.M.: On the formation and nature of quasi-cleavage fracture surfaces in hydrogen embrittled steels. Acta Mater. 59, 1601 (2011).Google Scholar