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

Research output: Contribution to journalArticle

Authors

  • Matthias Bruchhausen
  • Gintautas Dundulis
  • Alec McLennan
  • Sergio Arrieta
  • Tim Austin
  • Román Cicero
  • Walter-John Chitty
  • Luc Doremus
  • Miroslava Ernestova
  • Albertas Grybenas
  • Caitlin Huotilainen
  • Jonathan Mann
  • Kevin Mottershead
  • Radek Novotny
  • Fransisco Javier Perosanz
  • Norman Platts
  • Jean-Christophe le Roux
  • Philippe Spätig
  • Claudia Torre Celeizábal
  • Marius Twite

Institutes & Expert groups

  • EC - JRC - European Commission - Joint Research Centre
  • Lithuanian Energy Institute
  • High Temperature Facility Alliance
  • CIEMAT - Centro de Investigaciones Energéticas, Medioambientales y Tecnológicas
  • IRSN - Institute for Radioprotection and Nuclear Safety - Institut Radioprotection Sûreté Nucléaire
  • Framatome
  • ÚJV Řež, a. s.
  • VTT - Technical Research Centre of Finland Ltd. - Finland
  • Rolls-Royce Plc
  • EDF – R&D - MMC
  • PSI - Paul Scherrer Institute
  • Universidad de Cantabria - Inesco Ingenieros - Centro de Desarrollo Tecnológico

Documents & links

DOI

Abstract

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.

Details

Original languageEnglish
Article number1100307
Pages (from-to)1-20
Number of pages20
JournalMetals
Volume11
Issue number307
DOIs
Publication statusPublished - 10 Feb 2021

Keywords

  • Environmentally assisted fatigue (EAF), austenitic stainless steel, nuclear power plant, Light water reactor, surface roughness

ID: 7030195