Fatigue behaviour of ferritic-pearlitic-bainitic steel in loading with positive mean stress

Kód výsledku v IS VaVaI

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Výsledek na webu

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DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

Fatigue behaviour of ferritic-pearlitic-bainitic steel in loading with positive mean stress

Popis výsledku v původním jazyce

Effect of the mean stress on the cyclic stress-strain response, cyclic creep and fatigue life in ferritic-pearlitic-bainitic steel has been studied. Cylindrical specimens produced from from a massive forging of dimensions 500x500x2800 mm3 of 42CrMo4 steel (ferritic-pearlitic-bainitic structure) were cycled in computer controlled testing system. Stress and strain were recorded and plastic strain amplitude was evaluated from the half-width of the hysteresis loop. Both symmetrical plastic strain controlledtests and stresss controled tests with different mean stresses were performed. Experiments studying the initiation and short crack growth at different mean stresses confirm the decissive role of the plastic strain amplitude for the rate of short crack growth and thus also for the fatigue life.

Název v anglickém jazyce

Fatigue behaviour of ferritic-pearlitic-bainitic steel in loading with positive mean stress

Popis výsledku anglicky

Effect of the mean stress on the cyclic stress-strain response, cyclic creep and fatigue life in ferritic-pearlitic-bainitic steel has been studied. Cylindrical specimens produced from from a massive forging of dimensions 500x500x2800 mm3 of 42CrMo4 steel (ferritic-pearlitic-bainitic structure) were cycled in computer controlled testing system. Stress and strain were recorded and plastic strain amplitude was evaluated from the half-width of the hysteresis loop. Both symmetrical plastic strain controlledtests and stresss controled tests with different mean stresses were performed. Experiments studying the initiation and short crack growth at different mean stresses confirm the decissive role of the plastic strain amplitude for the rate of short crack growth and thus also for the fatigue life.

Druh

O - Ostatní výsledky

CEP obor

JL - Únava materiálu a lomová mechanika

OECD FORD obor

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Projekt

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

Návaznosti

Z - Vyzkumny zamer (s odkazem do CEZ)

Rok uplatnění

2010

Kód důvěrnosti údajů

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