The transition from the power-law to the power-law breakdown regimes in thermal creep of Zr1%Nb cladding alloys

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68081723%3A_____%2F21%3A00547496" target="_blank" >RIV/68081723:_____/21:00547496 - isvavai.cz</a>

Result on the web

<a href="http://www.kovmat.sav.sk/article.php?rr=59&cc=5&ss=279" target="_blank" >http://www.kovmat.sav.sk/article.php?rr=59&cc=5&ss=279</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.4149/km_2021_5_279" target="_blank" >10.4149/km_2021_5_279</a>

Result language

angličtina

Original language name

The transition from the power-law to the power-law breakdown regimes in thermal creep of Zr1%Nb cladding alloys

Original language description

In the present study, the tensile creep behaviour of three various cladding tubes of the Zr1%Nb alloy has been studied in the α-Zr region at 350◦C, which corresponds to the operational service conditions of the cladding tubes in nuclear light-water reactors. Tensile creep tests under the high constant applied stress region from 150 to 260MPa have been carried out at the transition from the power-law (PL) to the power-law breakdown (PLB) regimes. It was found that all dispersion strengthened Zr1%Nb cladding alloys under investigation reach the PLB regime at values of the compensated applied stress σ/G above approximately 8 × 10−3, where the stress exponent n of the minimum creep rate ˙εm (n = (∂ ln ˙εm/∂ ln σ)T) then dramatically increases from the value of ∼ 6 with increasing stress ratio σ/G. The fact that all experimental results for both the PL and PLB obey the Monkman-Grant relationship supports the idea that the creep mechanism in the PL and PLB does not change qualitatively and indicates a close link between the deformation and fracture processes in both creep regimes under investigation. However, future experiments could be carried out at different testing temperatures within the PLB regime to verify the controversial contemporary views.

Czech name

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Czech description

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Type

J_imp - 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

Result was created during the realization of more than one project. More information in the Projects tab.

Continuities

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year

2021

Confidentiality

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

Name of the periodical

Kovové materiály

ISSN

0023-432X

e-ISSN

1338-4252

Volume of the periodical

59

Issue of the periodical within the volume

5

Country of publishing house

SK - SLOVAKIA

Number of pages

11

Pages from-to

279-289

UT code for WoS article

000712441500001

EID of the result in the Scopus database

2-s2.0-85120607012