Low cycle fatigue of austempered ductile cast iron alloyed with nickel at room and at depressed temperature

Kód výsledku v IS VaVaI

RIV/61389005:_____/09:00331756 - isvavai.cz

Nalezeny alternativní kódy

RIV/68081723:_____/09:00331756 RIV/00216305:26210/09:PU87834

Výsledek na webu

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DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

Low cycle fatigue of austempered ductile cast iron alloyed with nickel at room and at depressed temperature

Popis výsledku v původním jazyce

Total strain controlled tests have been performed on cylindrical specimens of austempered ductile cast iron (ADI) with the aim to compare cyclic plasticity and the fatigue life at temperatures 23°C and ?45°C. The measurement of retained austenite by neutron diffraction before and after fatigue tests is used to discuss the cyclic stress-strain response. Cyclic hardening/softening curves, cyclic stress-strain curves and fatigue life curves were obtained for both temperatures. Cyclic stress-strain curve obtained at -45°C is shifted to higher stress amplitudes relative to room temperature curve. The fatigue life curves at both temperatures can be well approximated by the Manson-Coffin and Basquin laws.The Manson-Coffin curves are identical at both temperatures while the Basquin curve is shifted to longer fatigue life. Fatigue cracks initiated preferably from persistent slip markings at the interface of graphite nodule and the ausferrite matrix.

Název v anglickém jazyce

Low cycle fatigue of austempered ductile cast iron alloyed with nickel at room and at depressed temperature

Popis výsledku anglicky

Total strain controlled tests have been performed on cylindrical specimens of austempered ductile cast iron (ADI) with the aim to compare cyclic plasticity and the fatigue life at temperatures 23°C and ?45°C. The measurement of retained austenite by neutron diffraction before and after fatigue tests is used to discuss the cyclic stress-strain response. Cyclic hardening/softening curves, cyclic stress-strain curves and fatigue life curves were obtained for both temperatures. Cyclic stress-strain curve obtained at -45°C is shifted to higher stress amplitudes relative to room temperature curve. The fatigue life curves at both temperatures can be well approximated by the Manson-Coffin and Basquin laws.The Manson-Coffin curves are identical at both temperatures while the Basquin curve is shifted to longer fatigue life. Fatigue cracks initiated preferably from persistent slip markings at the interface of graphite nodule and the ausferrite matrix.

Druh

J_x - Nezařazeno - Článek v odborném periodiku (Jimp, Jsc a Jost)

CEP obor

JL - Únava materiálu a lomová mechanika

OECD FORD obor

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Projekt

1QS200410502: Vlastnosti konstrukčních materiálů vyvíjených a v krátkodobém horizontu použitelných v dopravě, zdravotnictví a energetice

Návaznosti

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

Rok uplatnění

2009

Kód důvěrnosti údajů

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

Název periodika

Materiálové inžinierstvo - Materials Engineering

ISSN

1335-0803

e-ISSN

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Svazek periodika

16

Číslo periodika v rámci svazku

3a

Stát vydavatele periodika

SK - Slovenská republika

Počet stran výsledku

6

Strana od-do

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Kód UT WoS článku

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EID výsledku v databázi Scopus

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