TY - JOUR
T1 - Effect of deformation twinning on dissolution corrosion of 316L stainless steels in contact with static liquid lead-bismuth eutectic (LBE) at 500 °C
AU - Klok, Oksana
AU - Lambrinou, Konstantina
AU - Gavrilov, Serguei
AU - Stergar, Erich
AU - Lim, Jun
AU - Van der Donck, Tom
AU - Van Renterghem, Wouter
AU - De Graeve, Iris
PY - 2018/11
Y1 - 2018/11
N2 - This work addresses the effect of deformation twinning on the dissolution corrosion behaviour of 316 L austenitic stainless steels in contact with static liquid lead-bismuth eutectic (LBE). For this purpose, plastically deformed 316 L steel specimens with distinctly different deformation twin densities were simultaneously exposed to oxygen-poor (<10−13 mass%) static liquid LBE for 1000 h at 500 °C. The variation in deformation twin density was achieved by loading in uniaxial tension to similar degrees of plastic deformation (8–10%) specimens made of the same 316 L steel heat. Tensile loading was carried out at −150, 25 and 150 °C so as to affect the twin density, which increased as the temperature of plastic deformation decreased. Dissolution corrosion was the only liquid metal corrosion mechanism observed in the LBE-exposed steel specimens. The thickness of the dissolution-affected zone increased with the deformation twin density, which was highest in the 316 L steel specimen deformed at −150 °C and lowest in the one deformed at 150 °C. As deformation twin boundaries accelerated the LBE ingress into the steel bulk, their local orientation with respect to the steel specimen surface affected the thickness of the dissolution-affected zone.
AB - This work addresses the effect of deformation twinning on the dissolution corrosion behaviour of 316 L austenitic stainless steels in contact with static liquid lead-bismuth eutectic (LBE). For this purpose, plastically deformed 316 L steel specimens with distinctly different deformation twin densities were simultaneously exposed to oxygen-poor (<10−13 mass%) static liquid LBE for 1000 h at 500 °C. The variation in deformation twin density was achieved by loading in uniaxial tension to similar degrees of plastic deformation (8–10%) specimens made of the same 316 L steel heat. Tensile loading was carried out at −150, 25 and 150 °C so as to affect the twin density, which increased as the temperature of plastic deformation decreased. Dissolution corrosion was the only liquid metal corrosion mechanism observed in the LBE-exposed steel specimens. The thickness of the dissolution-affected zone increased with the deformation twin density, which was highest in the 316 L steel specimen deformed at −150 °C and lowest in the one deformed at 150 °C. As deformation twin boundaries accelerated the LBE ingress into the steel bulk, their local orientation with respect to the steel specimen surface affected the thickness of the dissolution-affected zone.
KW - De-alloying
KW - Liquid metal corrosion
KW - Plastic deformation
KW - Stainless steel
KW - Twinning
UR - http://www.scopus.com/inward/record.url?scp=85052635672&partnerID=8YFLogxK
U2 - 10.1016/j.jnucmat.2018.08.030
DO - 10.1016/j.jnucmat.2018.08.030
M3 - Article
AN - SCOPUS:85052635672
VL - 510
SP - 556
EP - 567
JO - Journal of Nuclear Materials
JF - Journal of Nuclear Materials
SN - 0022-3115
ER -