Stress corrosion crack initiation testing with tapered specimens in high-temperature water – Results of a collaborative research project

Research output: Contribution to journalArticlepeer-review


  • Rik-Wouter Bosch
  • Stefan Ritter
  • Matthias Herbst
  • Renate Killan
  • M.Grace Burke
  • Jonathan Duff
  • Fabio Scenini
  • Yuchen Gu
  • Alice Dinu
  • Ulla Ehrnstén
  • Aki Toivonen
  • Radek Novotny
  • Oliver Martin
  • Francisco-Javier Perosanz
  • Andraz Legat
  • Bojan Zajec

Institutes & Expert groups

  • Framatome
  • UNIMAN - The University of Manchester
  • Swansea University - Department of Mathematics, College of Science
  • Technologies for Nuclear Energy State Owned Company
  • VTT - Technical Research Centre of Finland Ltd.
  • EC - JRC - European Commission - Joint Research Centre
  • CIEMAT - Centro de Investigaciones Energéticas, Medioambientales y Tecnológicas
  • ZAG - Slovenian National Building and Civil Engineering Institute
  • PSI - Paul Scherrer Institute

Documents & links


The applicability of an accelerated test technique using tapered tensile specimens for investigating the stress corrosion crack (SCC) initiation behaviour of structural materials in high-temperature water was assessed in the framework of a European collaborative research project (MICRIN – MItigation of CRack INitiation). The main advantage of using a tapered geometry is, that in a single test a stress gradient is obtained through the gauge length, and therefore a stress threshold for SCC initiation can be determined in a reasonable timeframe. This method was used to investigate two different materials that were known to be susceptible to SCC in light water reactor environment: a high-Si stainless steel and a Ni-base weld metal (Alloy 182). The results of the international test programme confirmed that the tapered specimen test methodology could be used to identify a SCC initiation stress threshold, albeit that significant scatter was present in the data.


Original languageEnglish
Pages (from-to)1-17
Number of pages17
JournalCorrosion Engineering, Science and Technology
Publication statusPublished - 8 Sep 2020


  • Stress corrosion cracking, Tapered specimens, High-temperature water, Crack initiation, Alloy 182, Stainless steel, Light water reactors

ID: 6956090