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

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68081723%3A_____%2F25%3A00604090" target="_blank" >RIV/68081723:_____/25:00604090 - isvavai.cz</a>

Výsledek na webu

<a href="https://www.sciencedirect.com/science/article/pii/S0142112324006595?via%3Dihub" target="_blank" >https://www.sciencedirect.com/science/article/pii/S0142112324006595?via%3Dihub</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>

Jazyk výsledku

angličtina

Název v původním jazyce

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

Popis výsledku v původním jazyce

In this article, strain-controlled Low-Cycle Fatigue (LCF) and fatigue-creep tests were conducted on COST FB2,na boron-added 9% Cr martensitic stainless steel, at 600◦C. LCF tests were performed with a mechanical strainnrate of 1 × 10−3/s, while the fatigue-creep tests involved either tensile or compressive strain dwells lastingn600 s. Both the LCF and fatigue-creep tests revealed cyclic softening behaviour, with the magnitude of relaxednstress decreasing with cycles in the fatigue-creep tests. This softening was associated with the coarsening ofnthe laths and subgrains and a reduction in dislocation density, both of which were more pronounced fornLCF loading at higher strain amplitudes and during fatigue-creep loading. Investigations into the damagenmechanisms identified environmentally assisted transgranular cracking as the predominant failure mode, withnthe 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.nFinally, a damage model combining the strain-life approach with a time-dependent damage term was proposednto effectively predict the reduction in lifetime during fatigue-creep tests compared to continuous LCF cycling.n

Název v anglickém jazyce

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

Popis výsledku anglicky

In this article, strain-controlled Low-Cycle Fatigue (LCF) and fatigue-creep tests were conducted on COST FB2,na boron-added 9% Cr martensitic stainless steel, at 600◦C. LCF tests were performed with a mechanical strainnrate of 1 × 10−3/s, while the fatigue-creep tests involved either tensile or compressive strain dwells lastingn600 s. Both the LCF and fatigue-creep tests revealed cyclic softening behaviour, with the magnitude of relaxednstress decreasing with cycles in the fatigue-creep tests. This softening was associated with the coarsening ofnthe laths and subgrains and a reduction in dislocation density, both of which were more pronounced fornLCF loading at higher strain amplitudes and during fatigue-creep loading. Investigations into the damagenmechanisms identified environmentally assisted transgranular cracking as the predominant failure mode, withnthe 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.nFinally, a damage model combining the strain-life approach with a time-dependent damage term was proposednto effectively predict the reduction in lifetime during fatigue-creep tests compared to continuous LCF cycling.n

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

2025

Kód důvěrnosti údajů

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

Název periodika

International Journal of Fatigue

ISSN

0142-1123

e-ISSN

1879-3452

Svazek periodika

193

Číslo periodika v rámci svazku

APR

Stát vydavatele periodika

GB - Spojené království Velké Británie a Severního Irska

Počet stran výsledku

17

Strana od-do

108800

Kód UT WoS článku

001400618200001

EID výsledku v databázi Scopus

2-s2.0-85214564111