Effect of different c/a ratio on the microstructure and mechanical properties in magnesium alloys processed by ECAP

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11320%2F16%3A10335181" target="_blank" >RIV/00216208:11320/16:10335181 - isvavai.cz</a>

Result on the web

<a href="http://dx.doi.org/10.1016/j.actamat.2015.12.050" target="_blank" >http://dx.doi.org/10.1016/j.actamat.2015.12.050</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.actamat.2015.12.050" target="_blank" >10.1016/j.actamat.2015.12.050</a>

Result language

angličtina

Original language name

Effect of different c/a ratio on the microstructure and mechanical properties in magnesium alloys processed by ECAP

Original language description

Three magnesium alloys, AE21, AE42 and LAE442, were prepared by ECAP employing 1-12 passes. The microstructure evolution during ECAP was systematically analyzed by EBSD. The AE21 and AE42 alloys show typical texture after ECAP with grains predominantly oriented with basal planes inclined by similar to 55 degrees from processing direction. This texture results from activation of basal slip during ECAP following the route B-c. The LAE442 alloy showed different texture formation, which is fully explained by different c/a ratio and activation of non-basal slip. The differences in the microstructure evolution resulted in different performance in mechanical loading. In the present study a complex investigation of mechanical properties is performed using uni-axial tensile and compression deformation tests and also by Vickers indentation that simulates multi-axial deformation. Resulting microhardness evolution was therefore correlated to grain size according to Hall-Petch relation and to the evolution of dislocation density measured by positron annihilation spectroscopy. On the other hand, the yield stress in the tensile and compression uni-axial deformation tests was determined mainly by the texture. It was shown that by tailoring the c/a ratio the typical texture development could be effectively suppressed in magnesium alloys processed by ECAP and in such way the negative effect of texture on strength can be avoided.

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

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

Continuities

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

Publication year

2016

Confidentiality

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

Name of the periodical

Acta Materialia

ISSN

1359-6454

e-ISSN

—

Volume of the periodical

107

Issue of the periodical within the volume

-

Country of publishing house

US - UNITED STATES

Number of pages

13

Pages from-to

83-95

UT code for WoS article

000373419600009

EID of the result in the Scopus database

2-s2.0-84957057345