Vliv metody ECAP na mikrostrukturu a creepové chování slitiny AL-3Mg-0,2Sc

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

Effect of equal ? channel angular pressing (ECAP) on microstructure and creep behaviour of Al-3Mg-0.2Sc alloy

Popis výsledku v původním jazyce

The coarse-grained material (Al-3Mg-0.2Sc alloy) was subjected to ECAP at room temperature. Compression creep tests were conducted on both states of material at the applied stresses from 16 to 80 MPa and temperature of 473 K. The results demonstrate thatthe minimum creep rate of the ultrafine-grained (UFG) material is up to two order at magnitude higher than that of the unpressed coarse-grained material. A microstructural investigation of this alloy was performed using electron microscopy (TEM and EBSD). The experiments show that ECAP reduced the average grain size to ~ 300 nm and led to the higher occurrence of high-angle boundaries. It should be stressed that the application of eight ECAP passes causes a substantial decrease in the creep resistanceof the alloy. Based upon the results it may be possible to suggest, that the creep behaviour of UFG alloy is influenced by grain boundary sliding accommodated by diffusion-controlled movement of intragranular mobile dislocations.

Název v anglickém jazyce

Effect of equal ? channel angular pressing (ECAP) on microstructure and creep behaviour of Al-3Mg-0.2Sc alloy

Popis výsledku anglicky

The coarse-grained material (Al-3Mg-0.2Sc alloy) was subjected to ECAP at room temperature. Compression creep tests were conducted on both states of material at the applied stresses from 16 to 80 MPa and temperature of 473 K. The results demonstrate thatthe minimum creep rate of the ultrafine-grained (UFG) material is up to two order at magnitude higher than that of the unpressed coarse-grained material. A microstructural investigation of this alloy was performed using electron microscopy (TEM and EBSD). The experiments show that ECAP reduced the average grain size to ~ 300 nm and led to the higher occurrence of high-angle boundaries. It should be stressed that the application of eight ECAP passes causes a substantial decrease in the creep resistanceof the alloy. Based upon the results it may be possible to suggest, that the creep behaviour of UFG alloy is influenced by grain boundary sliding accommodated by diffusion-controlled movement of intragranular mobile dislocations.

Druh

D - Stať ve sborníku

CEP obor

JG - Hutnictví, kovové materiály

OECD FORD obor

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Projekt

<a href="/cs/project/IAA2041301" target="_blank" >IAA2041301: Creepové procesy v ultrajemných kovech a slitinách připravených 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

2005

Kód důvěrnosti údajů

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

Název statě ve sborníku

NANO´05

ISBN

80-214-3085-0

ISSN

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e-ISSN

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Počet stran výsledku

4

Strana od-do

294-297

Název nakladatele

Brno University of Technology, Faculty of Mechanical Engineering

Místo vydání

Brno

Místo konání akce

Brno

Datum konání akce

8. 11. 2005

Typ akce podle státní příslušnosti

EUR - Evropská akce

Kód UT WoS článku

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