The optimization of ECAP conditions to achieve high strain-rate superplasticity in a Zr- and Sc-modified AA 7075 aluminum alloy

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11320%2F09%3A00206970" target="_blank" >RIV/00216208:11320/09:00206970 - isvavai.cz</a>

Result on the web

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DOI - Digital Object Identifier

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Result language

angličtina

Original language name

The optimization of ECAP conditions to achieve high strain-rate superplasticity in a Zr- and Sc-modified AA 7075 aluminum alloy

Original language description

An AA 7075 aluminum alloy with Zr and Sc additions was subjected to 6-8 ECAP passes at 120, 170, and 220 °C in order to examine the effect of the pressing conditions on the microstructural characteristics and the consequences for high-temperature mechanical properties. Using the method of EBSD, a decrease in pressing temperature was found to lead to a more pronounced refinement of the microstructure and a higher fraction of high-angle grain boundaries, but at the same time compromised the ability of theAl3 (Zr, Sc) phase to stabilize the ultra-fine-grained microstructure at elevated temperatures. Optimum superplastic properties were therefore achieved after pressing at the intermediate temperature of 170 °C. The material exhibited high strain-rate superplasticity with a ductility of 650 % at an initial strain rate of 1 x 10-1 s-1.

Czech name

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Czech description

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Type

J_x - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)

CEP classification

BM - Solid-state physics and magnetism

OECD FORD branch

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Project

<a href="/en/project/GA106%2F07%2F0303" target="_blank" >GA106/07/0303: The role of grain boundaries in high-temperature plastic deformation of fine-grained materials</a><br>

Continuities

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

Publication year

2009

Confidentiality

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

Name of the periodical

International Journal of Materials Research

ISSN

1862-5282

e-ISSN

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Volume of the periodical

100

Issue of the periodical within the volume

6

Country of publishing house

DE - GERMANY

Number of pages

7

Pages from-to

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UT code for WoS article

000267933300024

EID of the result in the Scopus database

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