Characterization of Austenitic Stainless Steels with Regard to Environmentally Assisted Fatigue in Simulated Light Water Reactor Conditions

Metals

卷:11

Jean-Christophe le Roux¹  Tim Austin²  Radek Novotny²  Matthias Bruchhausen²  Luc Doremus³  Claudia Torre Celeizábal⁴  Román Cicero⁴  Walter-John Chitty⁵  Norman Platts⁶  Alec McLennan⁶  Kevin Mottershead⁶  Philippe Spätig⁷  Gintautas Dundulis⁸  Albertas Grybenas⁸  Jonathan Mann⁹  Marius Twite⁹  Marc Vankeerberghen¹⁰  FranciscoJavier Perosanz¹¹  Sergio Arrieta¹¹  Miroslava Ernestova¹²  Caitlin Huotilainen¹³ 

[1] EDF—R&D MMC, Avenue des Renardières—Ecuelles, 77250 Moret-Loing et Orvanne, France;

[2] European Commission, Joint Research Centre, Westerduinweg 3, 1755 LE Petten, The Netherlands;

[3] Framatome, Technical Centre, 30 Bd de l’industrie, 71200 Le Creusot, France;

[4] Inesco Ingenieros, CDTUC, Fase B, Av. Los Castros 44, 39005 Santander, Spain;

[5] Institut de Radioprotection et de Sûreté Nucléaire (IRSN), PSN-RES/SEREX/LE2M, CEN de Cadarache, 13115 St. Paul lez Durance, France;

[6] Jacobs, Faraday Street, Birchwood Park, Warrington WA3 6GA, UK;

[7] Laboratory for Nuclear Materials, Paul Scherrer Institute, 5232 Villigen-PSI, Switzerland;

[8] Lithuanian Energy Institute, Breslaujos 3, LT-44403 Kaunas, Lithuania;

[9] Rolls-Royce, Raynesway P.O. Box 2000, Derby DE21 7XX, UK;

[10] SCK CEN, Boeretang 200, 2400 Mol, Belgium;

[11] Structural Materials Division, Technology Department, Centro de Investigaciones Energéticas, Medioambientales y Tecnológicas (CIEMAT), Avenida Complutense 40, 28040 Madrid, Spain;

[12] UJV REZ, a. s., Hlavni 130, 25068 Husinec, Czech Republic;

[13] VTT Technical Research Centre of Finland, Nuclear Reactor Materials, Kivimiehentie 3, 02150 Espoo, Finland;

关键词: environmentally assisted fatigue (EAF);    austenitic stainless steel;    nuclear power plant (NPP);    light water reactor (LWR);    surface roughness;   

DOI  :  10.3390/met11020307

来源: DOAJ

【 摘 要 】

A substantial amount of research effort has been applied to the field of environmentally assisted fatigue (EAF) due to the requirement to account for the EAF behaviour of metals for existing and new build nuclear power plants. We present the results of the European project INcreasing Safety in NPPs by Covering Gaps in Environmental Fatigue Assessment (INCEFA-PLUS), during which the sensitivities of strain range, environment, surface roughness, mean strain and hold times, as well as their interactions on the fatigue life of austenitic steels has been characterized. The project included a test campaign, during which more than 250 fatigue tests were performed. The tests did not reveal a significant effect of mean strain or hold time on fatigue life. An empirical model describing the fatigue life as a function of strain rate, environment and surface roughness is developed. There is evidence for statistically significant interaction effects between surface roughness and the environment, as well as between surface roughness and strain range. However, their impact on fatigue life is so small that they are not practically relevant and can in most cases be neglected. Reducing the environmental impact on fatigue life by modifying the temperature or strain rate leads to an increase of the fatigue life in agreement with predictions based on NUREG/CR-6909. A limited sub-programme on the sensitivity of hold times at elevated temperature at zero force conditions and at elevated temperature did not show the beneficial effect on fatigue life found in another study.

【 授权许可】

Unknown