Isothermal low-cycle fatigue and fatigue-creep behaviour of boron-added 9% Cr martensitic stainless steel at 600°C

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21220%2F25%3A00384521" target="_blank" >RIV/68407700:21220/25:00384521 - isvavai.cz</a>

Result on the web

<a href="https://doi.org/10.1016/j.ijfatigue.2024.108800" target="_blank" >https://doi.org/10.1016/j.ijfatigue.2024.108800</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.ijfatigue.2024.108800" target="_blank" >10.1016/j.ijfatigue.2024.108800</a>

Result language

angličtina

Original language name

Isothermal low-cycle fatigue and fatigue-creep behaviour of boron-added 9% Cr martensitic stainless steel at 600°C

Original language description

In this article, strain-controlled Low-Cycle Fatigue (LCF) and fatigue-creep tests were conducted on COST FB2, a boron-added 9% Cr martensitic stainless steel, at 600 degrees C. LCF tests were performed with a mechanical strain rate of 1 x 10 -3 /s, while the fatigue-creep tests involved either tensile or compressive strain dwells lasting 600 s. Both the LCF and fatigue-creep tests revealed cyclic softening behaviour, with the magnitude of relaxed stress decreasing with cycles in the fatigue-creep tests. This softening was associated with the coarsening of the laths and subgrains and a reduction in dislocation density, both of which were more pronounced for LCF loading at higher strain amplitudes and during fatigue-creep loading. Investigations into the damage mechanisms identified environmentally assisted transgranular cracking as the predominant failure mode, with the severity of oxidation-induced cracking increasing with higher applied strain amplitudes or during fatigue- creep loading with compressive dwell, while cracking was suppressed during tests with tensile strain dwell. Finally, a damage model combining the strain-life approach with a time-dependent damage term was proposed to effectively predict the reduction in lifetime during fatigue-creep tests compared to continuous LCF cycling.

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

20302 - Applied mechanics

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

2025

Confidentiality

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

Name of the periodical

International Journal of Fatigue

ISSN

0142-1123

e-ISSN

1879-3452

Volume of the periodical

193

Issue of the periodical within the volume

108800

Country of publishing house

NL - THE KINGDOM OF THE NETHERLANDS

Number of pages

17

Pages from-to

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UT code for WoS article

001400618200001

EID of the result in the Scopus database

2-s2.0-85214564111