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

Kód výsledku v 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>

Výsledek na webu

<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>

Jazyk výsledku

angličtina

Název v původním jazyce

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

Popis výsledku v původním jazyce

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.

Název v anglickém jazyce

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

Popis výsledku anglicky

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.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

20501 - Materials engineering

Projekt

—

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2023

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Journal of Nuclear Materials

ISSN

0022-3115

e-ISSN

1873-4820

Svazek periodika

583

Číslo periodika v rámci svazku

SEP

Stát vydavatele periodika

NL - Nizozemsko

Počet stran výsledku

12

Strana od-do

154518

Kód UT WoS článku

001007161300001

EID výsledku v databázi Scopus

2-s2.0-85159549731