Low temperature superplasticity of the ECAP Al7075-based alloy

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11320%2F18%3A10389819" target="_blank" >RIV/00216208:11320/18:10389819 - isvavai.cz</a>

Alternative codes found

RIV/68378271:_____/18:00499911

Result on the web

<a href="https://doi.org/10.22226/2410-3535-2018-4-549-553" target="_blank" >https://doi.org/10.22226/2410-3535-2018-4-549-553</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.22226/2410-3535-2018-4-549-553" target="_blank" >10.22226/2410-3535-2018-4-549-553</a>

Result language

angličtina

Original language name

Low temperature superplasticity of the ECAP Al7075-based alloy

Original language description

Using equal channel angular pressing (ECAP) at 120 degrees C, a sub-microcrystalline structure was prepared in the Al7075 alloy modified by the addition of 0.2 wt. % Sc and 0.11 wt. % Zr. This relatively low ECAP temperature resulted in a very fine grain size of 0.5 mu m, however, this microstructure was not stable and a grain growth started already at 300 degrees C. Consequently, the superplastic behaviour was not observed at temperatures above 400 degrees C which are typical for the Al7075-type alloys. The tensile tests performed at temperatures below 300 degrees C revealed enhanced ductility -elongation exceeding 300 % was observed in this material already at 200 degrees C. In order to verify whether such behaviour can be considered as so called &quot;low temperature superplasticity&quot;, a microstructure investigation was performed using scanning electron microscopy, electron back scatter diffraction, transmission electron microscopy, and atom force microscopy. These experiments revealed that the deformation mechanism was similar to that observed in &quot;true&quot; superplasticity. Grain boundary sliding played still an active role. The elongation of individual grains during straining was significantly lower in comparison with the overall sample elongation, nevertheless it documented the contribution of dislocation slip to the deformation mechanism.

Czech name

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Czech description

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Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

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OECD FORD branch

10302 - Condensed matter physics (including formerly solid state physics, supercond.)

Project

Result was created during the realization of more than one project. More information in the Projects tab.

Continuities

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year

2018

Confidentiality

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

Name of the periodical

Letters on Materials

ISSN

2218-5046

e-ISSN

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Volume of the periodical

8

Issue of the periodical within the volume

4

Country of publishing house

RU - RUSSIAN FEDERATION

Number of pages

5

Pages from-to

549-553

UT code for WoS article

000457554700008

EID of the result in the Scopus database

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