Creep damage tolerance factor lambda of selected creep-resistant steels

0480656 - ÚFM 2018 RIV CH eng C - Konferenční příspěvek (zahraniční konf.)
Sklenička, Václav - Kuchařová, Květa - Dvořák, Jiří - Kvapilová, Marie - Král, Petr
Creep damage tolerance factor lambda of selected creep-resistant steels.
Advances in Fracture and Damage Mechanics XVI. Zurich: Trans Tech Publications Ltd, 2017 - (Mariano, P.; Baragetti, S.; Casavola, K.; Pappalettere, C.; Aliabadi, F.), s. 47-50. Key Engineering Materials, 754. ISBN 978-3-0357-1168-4. ISSN 1662-9795.
[FDM 2017 - International Conference on Fracture and Damage Mechanics /16./. Florence (IT), 18.07.2017-20.07.2017]
Grant CEP: GA ČR(CZ) GA16-09518S
Institucionální podpora: RVO:68081723
Klíčová slova: creep * creep damage tolerance factor lambda * fracture mode * creep fracture plasticity
Obor OECD: Materials engineering

The creep damage tolerance factor lambda as an important outcome of the continuum damage mechanics approach has been used to asses the creep fracture mode and the susceptibility of material to localized cracking at strain concentrations. In this work, using sets of our earlier published creep data of three advanced ferritic creep-resistant steels (T23 low alloy steel, P91 and P92 chromium steels) are analysed in terms of the creep damage tolerance factor lambda. It was found that the value of the creep damage factor lambda is not constant and depends on the creep loading conditions. The data analysis is followed by fractographic investigations, which is used to identify the creep fracture mode(s) experimentally.
Trvalý link: http://hdl.handle.net/11104/0276520