High-temperature creep tests of two creep-resistant materials at constant stress and constant load

0524000 - ÚFM 2024 RIV CH eng C - Conference Paper (international conference)
Sklenička, Václav - Kuchařová, Květa - Kvapilová, Marie - Kloc, Luboš - Dvořák, Jiří - Král, Petr
High-temperature creep tests of two creep-resistant materials at constant stress and constant load.
Advances in Fracture and Damage Mechanics XVIII. Zurrich: Trans Tech Publications, 2020 - (Paipetis, S.; Aliabadi, F.), s. 246-251. Key Engineering Materials, 827. ISBN 978-3-0357-1586-6. ISSN 1013-9826.
[FDM 2019 International Conference on Fracture and Damage Mechanics /18./. Rhodos (GR), 16.09.2019-18.09.2019]
R&D Projects: GA TA ČR(CZ) TH02020477
Institutional support: RVO:68081723
Keywords : Binary alloys * Chromium steel * Creep * Fracture * High temperature creep
OECD category: Materials engineering

Creep is defined as a time dependent component of plastic deformation. Creep tests can be performed either at constant load or at constant applied stress. Engineering creep tests carried out at constant load are aimed at determination of the creep strength or creep fracture strength, i.e. the data needed for design. The constant stress tests are important as a data source for fundamental investigations of creep deformation and fracture mechanisms and for finite element modelling of more complex stress situations. For some materials, the difference between the two type of testing can be very small, while for other materials is large, depending on the creep plasticity of the material under testing. The paper aims to compare the creep results of two different creep-resistant materials: the advanced 9%Cr martensitic steel (ASME Grade P91) and a Zr1%Nb alloy obtained by both testing methods and to clarify the decisive factors causing observed differences in their creep behaviour
Permanent Link: http://hdl.handle.net/11104/0311460