The influence of Mean Stress on Fatigue Properties of ADI

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216305%3A26210%2F08%3APU78175" target="_blank" >RIV/00216305:26210/08:PU78175 - isvavai.cz</a>

Výsledek na webu

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DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

The influence of Mean Stress on Fatigue Properties of ADI

Popis výsledku v původním jazyce

The paper presents the results of research focused on assessment of the influence of loading cycle asymmetry on fatigue limit values. For tests two heats of unalloyed nodular cast iron were used. Test bars made of keel blocks were heat treated in salt bathes (austenitization at 900oC during 1 hour, isothermal transformation at 380 and 400oC) and loaded at symmetrical, repeating and pulsating loading cycles at room temperature. Evaluation of fatigue properties was based on the determination of S-N curvesin high-cycle region including the fatigue limit assessment for 10*7 cycles to fracture. Fatigue and static tests were completed by metallographic and quantitative phase analysis. Most important result obtained from the presented study is that the dependence of stress amplitude on mean stress cannot be approached by the linear relation but by general power law with eyponent lower than 1 (i. e. the Haigh diagram has convex shape).

Název v anglickém jazyce

The influence of Mean Stress on Fatigue Properties of ADI

Popis výsledku anglicky

The paper presents the results of research focused on assessment of the influence of loading cycle asymmetry on fatigue limit values. For tests two heats of unalloyed nodular cast iron were used. Test bars made of keel blocks were heat treated in salt bathes (austenitization at 900oC during 1 hour, isothermal transformation at 380 and 400oC) and loaded at symmetrical, repeating and pulsating loading cycles at room temperature. Evaluation of fatigue properties was based on the determination of S-N curvesin high-cycle region including the fatigue limit assessment for 10*7 cycles to fracture. Fatigue and static tests were completed by metallographic and quantitative phase analysis. Most important result obtained from the presented study is that the dependence of stress amplitude on mean stress cannot be approached by the linear relation but by general power law with eyponent lower than 1 (i. e. the Haigh diagram has convex shape).

Druh

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

CEP obor

JG - Hutnictví, kovové materiály

OECD FORD obor

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Projekt

<a href="/cs/project/GA106%2F03%2F1265" target="_blank" >GA106/03/1265: Vliv vybraných faktorů na únavové vlastnosti izotermicky zušlechtěné tvárné litiny</a><br>

Návaznosti

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

Rok uplatnění

2008

Kód důvěrnosti údajů

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

Název periodika

Materials Science Forum

ISSN

0255-5476

e-ISSN

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Svazek periodika

567-568

Číslo periodika v rámci svazku

5

Stát vydavatele periodika

CH - Švýcarská konfederace

Počet stran výsledku

4

Strana od-do

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Kód UT WoS článku

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EID výsledku v databázi Scopus

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