Stress corrosion crack initiation testing with tapered specimens in high-temperature water - results of a collaborative research projectBosch, Rik-Wouter (Avtor) Ritter, Stefan (Avtor) Herbst, Matthias (Avtor) Kilian, Renate (Avtor) Burke, Grace (Avtor) Duff, Jonathan (Avtor) Scenini, Fabio (Avtor) Gu, Yuchen (Avtor) Dinu, Alice (Avtor) Ehrnsten, Ulla (Avtor) Toivonen, Aki (Avtor) Novotny, Radek (Avtor) Martin, Oliver (Avtor) Perosanz, Francisco Javier (Avtor) Legat, Andraž (Avtor) Zajec, Bojan (Avtor) stress corrosion crackingsurface finish impacttapered tensile specimenautoclaveaccelerated testinglight water nuclear reactorcritical threshold stressThe 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.Maney for the Institute of Materials, Minerals, and Mining20202023-08-28 08:02:16Neznano16843UDK: 620.1/.2ISSN pri članku: 1743-2782DOI: 10.1080/1478422X.2020.1815460COBISS_ID: 31277059sl© 2020 The Author(s). Published by Informa UK Limited, trading as Taylor & Francis Group