Zvláštnosti deformace a lomového chování izotermicky zušlechtěné litiny s kuličkovým grafitem

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216305%3A26210%2F05%3APU55616" target="_blank" >RIV/00216305:26210/05:PU55616 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/60162694:G43__/05:K216__11

Výsledek na webu

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DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

Some Peculiarities in Deformation and Fracture Behaviour of Austempered Ductile Cast Iron

Popis výsledku v původním jazyce

Tensile tests and fracture thoughness tests of an unalloyed austempered ductile cast iron (ADI) with the matrix created by upper bainite and containing 30 to 35% of retained austenite were performed in a temperature range - 196C to + 200C to study its mechanical behaviour. The temperature depnedence of true fracture stress, elongation to fracture, and reduction of area is separated into three regions with different fracture behaviour. Unmonotonous temperature depnedence of yeld points defined by plasticc strain of 0.05 to 2% is evidence of the stress induced phase transformation of retained austenite into martensite before these values of plastic strain are reached. The transformation of retained austenite is also substantiated with an increase of hardness and in several cases the decrease of retained austenite content was directly determined with X-ray quantitative phase analysis. Also higher values of dynamic than of static fracture thoughness are evidence of unusual behviour of ADI

Název v anglickém jazyce

Some Peculiarities in Deformation and Fracture Behaviour of Austempered Ductile Cast Iron

Popis výsledku anglicky

Tensile tests and fracture thoughness tests of an unalloyed austempered ductile cast iron (ADI) with the matrix created by upper bainite and containing 30 to 35% of retained austenite were performed in a temperature range - 196C to + 200C to study its mechanical behaviour. The temperature depnedence of true fracture stress, elongation to fracture, and reduction of area is separated into three regions with different fracture behaviour. Unmonotonous temperature depnedence of yeld points defined by plasticc strain of 0.05 to 2% is evidence of the stress induced phase transformation of retained austenite into martensite before these values of plastic strain are reached. The transformation of retained austenite is also substantiated with an increase of hardness and in several cases the decrease of retained austenite content was directly determined with X-ray quantitative phase analysis. Also higher values of dynamic than of static fracture thoughness are evidence of unusual behviour of ADI

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

<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

2005

Kód důvěrnosti údajů

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

Název periodika

Materials Science

ISSN

1392-1320

e-ISSN

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Svazek periodika

11

Číslo periodika v rámci svazku

4

Stát vydavatele periodika

LT - Litevská republika

Počet stran výsledku

6

Strana od-do

338-343

Kód UT WoS článku

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EID výsledku v databázi Scopus

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