Investigation of the thermal creep behaviour of non-irradiated Zr1%Nb cladding alloys between 623 and 1223K

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68081723%3A_____%2F23%3A00573358" target="_blank" >RIV/68081723:_____/23:00573358 - isvavai.cz</a>
Result on the web
<a href="https://www.sciencedirect.com/science/article/pii/S0022311523002854?via%3Dihub" target="_blank" >https://www.sciencedirect.com/science/article/pii/S0022311523002854?via%3Dihub</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1016/j.jnucmat.2023.154518" target="_blank" >10.1016/j.jnucmat.2023.154518</a>

Result language
angličtina
Original language name
Investigation of the thermal creep behaviour of non-irradiated Zr1%Nb cladding alloys between 623 and 1223K
Original language description
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.
Czech name
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Czech description
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Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
20501 - Materials engineering

Project
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Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year
2023
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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