INFLUENCE OF ECAP TECHNIQUE ON CREEP BEHAVIOUR OF POWDER ALUMINIUM PROCESSED BY DIRECT EXTRUSION

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68081723%3A_____%2F10%3A00351485" target="_blank" >RIV/68081723:_____/10:00351485 - 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

INFLUENCE OF ECAP TECHNIQUE ON CREEP BEHAVIOUR OF POWDER ALUMINIUM PROCESSED BY DIRECT EXTRUSION

Popis výsledku v původním jazyce

The Al powder was prepared by cold isostatic pressing at the pressure of 200 MPa. The granulometric powder fraction of a particle size less than 400 ?m was compacted via conventional direct hot-extrusion (DE) at temperature 450°C. This material was thensubjected to ECAP technique up to 4 passes. The microstructural investigations were performed using OM and SEM equipped with an EBSD unit. Creep tests in tension were conducted at temperature of 473 K and at applied stresses in the range from 30 to 60 MPa. Some creep tests in compression were performed on material just after DE. The paper presents results of study of microstructure and creep behaviour of aluminium powder before and after ECAP. It was found that ECAP method does not lead to an additionalmarked refinement of grain size. However, in dependence on number of ECAP passes ECAP method markedly influences creep behaviour due to development of high-angle grain boundaries during ECAP process.

Název v anglickém jazyce

INFLUENCE OF ECAP TECHNIQUE ON CREEP BEHAVIOUR OF POWDER ALUMINIUM PROCESSED BY DIRECT EXTRUSION

Popis výsledku anglicky

The Al powder was prepared by cold isostatic pressing at the pressure of 200 MPa. The granulometric powder fraction of a particle size less than 400 ?m was compacted via conventional direct hot-extrusion (DE) at temperature 450°C. This material was thensubjected to ECAP technique up to 4 passes. The microstructural investigations were performed using OM and SEM equipped with an EBSD unit. Creep tests in tension were conducted at temperature of 473 K and at applied stresses in the range from 30 to 60 MPa. Some creep tests in compression were performed on material just after DE. The paper presents results of study of microstructure and creep behaviour of aluminium powder before and after ECAP. It was found that ECAP method does not lead to an additionalmarked refinement of grain size. However, in dependence on number of ECAP passes ECAP method markedly influences creep behaviour due to development of high-angle grain boundaries during ECAP process.

Druh

D - Stať ve sborníku

CEP obor

JJ - Ostatní materiály

OECD FORD obor

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Projekt

<a href="/cs/project/KJB200410801" target="_blank" >KJB200410801: Studium nano-strukturních materiálů konsolidovaných z práškových kompaktů technikou ECAP</a><br>

Návaznosti

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

Název statě ve sborníku

Nanocon 2010

ISBN

978-80-87294-18-5

ISSN

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e-ISSN

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Počet stran výsledku

6

Strana od-do

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Název nakladatele

Tanger Ltd

Místo vydání

Ostrava

Místo konání akce

Rožnov pod Radhoštěm

Datum konání akce

12. 10. 2010

Typ akce podle státní příslušnosti

CST - Celostátní akce

Kód UT WoS článku

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