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Investigation of the thermal creep behaviour of non-irradiated Zr1%Nb cladding alloys between 623 and 1223K
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SYSNO ASEP 0573358 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Investigation of the thermal creep behaviour of non-irradiated Zr1%Nb cladding alloys between 623 and 1223K Author(s) Sklenička, Václav (UFM-A) RID, ORCID
Kuchařová, Květa (UFM-A) RID, ORCID
Král, Petr (UFM-A) RID, ORCID
Dvořák, Jiří (UFM-A) RID, ORCID
Kvapilová, Marie (UFM-A) RID, ORCID
Vrtílková, V. (CZ)
Krejcí, J. (CZ)Number of authors 7 Article number 154518 Source Title Journal of Nuclear Materials. - : Elsevier - ISSN 0022-3115
Roč. 583, SEP (2023)Number of pages 12 s. Language eng - English Country NL - Netherlands Keywords Zirconium alloys ; Creep ; Creep testing ; Deformation mechanisms ; Microstructural processes Subject RIV JG - Metallurgy OECD category Materials engineering Method of publishing Limited access Institutional support UFM-A - RVO:68081723 UT WOS 001007161300001 EID SCOPUS 85159549731 DOI 10.1016/j.jnucmat.2023.154518 Annotation Short-term constant stress creep tests in tension were performed on two zirconium Zr1%Nb cladding alloys in the form of thin-walled cladding tubes in the temperature range of 623-1173 K and at the applied tensile stress sigma range of 5 - 225 MPa to provide further information on their creep behaviour in the alpha-Zr and (alpha+beta)-Zr phase regions. In parallel, the evolution of the microstructure of the studied alloys was investigated using SEM and TEM microscopy in the as-received state and after creep exposures. Using the dependence of diffusion coefficientcompensated minimum creep rate vs modulus compensated applied stress the values of the stress rate exponent n = ( partial differential ln epsilon m/ partial differential ln sigma)T were determined ranging from -2.5 up to -16 depending on the applied stress and testing temperature. The stress-dependant activation energy for creep QC=[ partial differential ln epsilon m/ partial differential (-1/kT)]sigma was determined and possible creep deformation mechanisms as well as creep strengthening mechanisms are discussed. Under the loading conditions used in this study three distinct stress regions were identified according to the relevant controlling creep deformation mechanisms. Workplace Institute of Physics of Materials Contact Yvonna Šrámková, sramkova@ipm.cz, Tel.: 532 290 485 Year of Publishing 2024 Electronic address https://www.sciencedirect.com/science/article/pii/S0022311523002854?via%3Dihub
Number of the records: 1