TY - JOUR
T1 - Crack propagation rate modelling for 316SS exposed to PWR-relevant conditions
AU - Vankeerberghen, Marc
AU - Weyns, Gert
AU - Gavrilov, Serguei
AU - Martens, Benedikt
AU - Deconinck, Johan
N1 - Score = 10
PY - 2009/2/28
Y1 - 2009/2/28
N2 - The crack propagation rate of Type 316 stainless steel in boric acid–lithium hydroxide solutions under PWR-relevant conditions was modelled. A film rupture/dissolution/repassivation mechanism is assumed and extended to cold worked materials by including a stress-dependent bare metal dissolution current density. The chemical and electrochemical conditions within the crack are calculated by finite element calculations, an analytical expression is used for the crack-tip strain rate and the crack-tip stress is assumed equal to 2.5 times the yield stress (plane-strain). First the model was calibrated against a literature published data set. Afterwards, the influence of various variables – dissolved hydrogen, boric acid and lithium hydroxide content, stress intensity, crack length, temperature, flow rate – was studied. Finally, other published crack growth rate tests were modelled and the calculated crack growth rates were found to be in reasonable agreement with the reported ones.
AB - The crack propagation rate of Type 316 stainless steel in boric acid–lithium hydroxide solutions under PWR-relevant conditions was modelled. A film rupture/dissolution/repassivation mechanism is assumed and extended to cold worked materials by including a stress-dependent bare metal dissolution current density. The chemical and electrochemical conditions within the crack are calculated by finite element calculations, an analytical expression is used for the crack-tip strain rate and the crack-tip stress is assumed equal to 2.5 times the yield stress (plane-strain). First the model was calibrated against a literature published data set. Afterwards, the influence of various variables – dissolved hydrogen, boric acid and lithium hydroxide content, stress intensity, crack length, temperature, flow rate – was studied. Finally, other published crack growth rate tests were modelled and the calculated crack growth rates were found to be in reasonable agreement with the reported ones.
KW - stress corrosion cracking
KW - modelling
KW - crack growth
KW - stainless steel
UR - http://ecm.sckcen.be/OTCS/llisapi.dll/open/ezp_94913
UR - http://knowledgecentre.sckcen.be/so2/bibref/5598
U2 - 10.1016/j.jnucmat.2008.11.034
DO - 10.1016/j.jnucmat.2008.11.034
M3 - Article
SN - 0022-3115
VL - 384
SP - 274
EP - 285
JO - Journal of Nuclear Materials
JF - Journal of Nuclear Materials
IS - 3
ER -