Microstructure and high temperature deformation of an ultra-fine grained ECAP AA7075 aluminium alloy

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11320%2F13%3A10193130" target="_blank" >RIV/00216208:11320/13:10193130 - isvavai.cz</a>

Výsledek na webu

<a href="http://dx.doi.org/10.3139/146.110833" target="_blank" >http://dx.doi.org/10.3139/146.110833</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.3139/146.110833" target="_blank" >10.3139/146.110833</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Microstructure and high temperature deformation of an ultra-fine grained ECAP AA7075 aluminium alloy

Popis výsledku v původním jazyce

An AA 7075 aluminium alloy with an ultra-fine grained structure was prepared through equal channel angular pressing (ECAP) at pressing temperatures T-ECAP of 120, 170, and 220 degrees C. A decrease in T-ECAP from 220 to 120 degrees C was found to lead toa more pronounced refinement of the microstructure and to worse stability of the microstructure -the onset of grain coarsening was displaced to lower temperatures. The material pressed with the highest T-ECAP exhibited superplastic behaviour at temperatures close to 400 C and grain boundary sliding was identified as the dominant operating deformation mechanism. The materials prepared with both of the lower T-ECAP exhibited only enhanced ductility of about 200%, however this behaviour was observed at temperatures as low as 200 degrees C. It was found that this "low temperature superplasticity" resulted from a combined operation of grain boundary sliding at selected grain boundaries and glide of lattice dislocations.

Název v anglickém jazyce

Microstructure and high temperature deformation of an ultra-fine grained ECAP AA7075 aluminium alloy

Popis výsledku anglicky

An AA 7075 aluminium alloy with an ultra-fine grained structure was prepared through equal channel angular pressing (ECAP) at pressing temperatures T-ECAP of 120, 170, and 220 degrees C. A decrease in T-ECAP from 220 to 120 degrees C was found to lead toa more pronounced refinement of the microstructure and to worse stability of the microstructure -the onset of grain coarsening was displaced to lower temperatures. The material pressed with the highest T-ECAP exhibited superplastic behaviour at temperatures close to 400 C and grain boundary sliding was identified as the dominant operating deformation mechanism. The materials prepared with both of the lower T-ECAP exhibited only enhanced ductility of about 200%, however this behaviour was observed at temperatures as low as 200 degrees C. It was found that this "low temperature superplasticity" resulted from a combined operation of grain boundary sliding at selected grain boundaries and glide of lattice dislocations.

Druh

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

CEP obor

BM - Fyzika pevných látek a magnetismus

OECD FORD obor

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Projekt

<a href="/cs/project/GA106%2F07%2F0303" target="_blank" >GA106/07/0303: Úloha hranic zrn při vysokoteplotní plastické deformaci jemnozrnných materiálů</a><br>

Návaznosti

Z - Vyzkumny zamer (s odkazem do CEZ)

Rok uplatnění

2013

Kód důvěrnosti údajů

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

Název periodika

International Journal of Materials Research

ISSN

1862-5282

e-ISSN

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Svazek periodika

104

Číslo periodika v rámci svazku

1

Stát vydavatele periodika

DE - Spolková republika Německo

Počet stran výsledku

8

Strana od-do

1-8

Kód UT WoS článku

000313923600001

EID výsledku v databázi Scopus

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