Damage mechanism in austenitic steel during high temperature cyclic loading with dwells

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68081723%3A_____%2F18%3A00497328" target="_blank" >RIV/68081723:_____/18:00497328 - isvavai.cz</a>

Výsledek na webu

<a href="http://dx.doi.org/10.1016/j.ijfatigue.2018.02.017" target="_blank" >http://dx.doi.org/10.1016/j.ijfatigue.2018.02.017</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.ijfatigue.2018.02.017" target="_blank" >10.1016/j.ijfatigue.2018.02.017</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Damage mechanism in austenitic steel during high temperature cyclic loading with dwells

Popis výsledku v původním jazyce

Austenitic stainless Sanicro 25 steel has been subjected to high temperature elasto-plastic cyclic straining at 700 degrees C. The isothermal cyclic tests without and with a dwell in the loading cycle were implemented. Several strain amplitudes and optional dwells of 10 min in tensile part of the loading cycle were applied to the specimens. Cyclic stress-strain response was recorded, cyclic hardening/softening curves and fatigue life curves were obtained. Scanning electron microscopy combined with focused ion beam allowed observing sections containing secondary cracks. They were used to identify the surface damage evolution. In order to investigate the internal damage the longitudinal cross sections parallel to the stress axis of the fatigued specimens were prepared. The crack paths and their relation to the grain and twin boundaries were studied by means of electron back scatter diffraction. Several distinct mechanisms of the crack initiation were found in both types of cyclic loading. The effect of the dwell in the loading cycles on fatigue life is discussed in relation to the surface and internal damage evolution.

Název v anglickém jazyce

Damage mechanism in austenitic steel during high temperature cyclic loading with dwells

Popis výsledku anglicky

Austenitic stainless Sanicro 25 steel has been subjected to high temperature elasto-plastic cyclic straining at 700 degrees C. The isothermal cyclic tests without and with a dwell in the loading cycle were implemented. Several strain amplitudes and optional dwells of 10 min in tensile part of the loading cycle were applied to the specimens. Cyclic stress-strain response was recorded, cyclic hardening/softening curves and fatigue life curves were obtained. Scanning electron microscopy combined with focused ion beam allowed observing sections containing secondary cracks. They were used to identify the surface damage evolution. In order to investigate the internal damage the longitudinal cross sections parallel to the stress axis of the fatigued specimens were prepared. The crack paths and their relation to the grain and twin boundaries were studied by means of electron back scatter diffraction. Several distinct mechanisms of the crack initiation were found in both types of cyclic loading. The effect of the dwell in the loading cycles on fatigue life is discussed in relation to the surface and internal damage evolution.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

20306 - Audio engineering, reliability analysis

Projekt

Výsledek vznikl pri realizaci vícero projektů. Více informací v záložce Projekty.

Návaznosti

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

Rok uplatnění

2018

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

—

Svazek periodika

113

Číslo periodika v rámci svazku

AUG

Stát vydavatele periodika

GB - Spojené království Velké Británie a Severního Irska

Počet stran výsledku

10

Strana od-do

335-344

Kód UT WoS článku

000437373300030

EID výsledku v databázi Scopus

2-s2.0-85046715990