Influence of strain rate on deformation behaviour of an AX52 alloy processed by equal channel angular pressing (ECAP)

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F26316919%3A_____%2F18%3AN0000027" target="_blank" >RIV/26316919:_____/18:N0000027 - isvavai.cz</a>

Alternative codes found

RIV/00216208:11320/18:10389798 RIV/26316919:_____/18:N0000028

Result on the web

<a href="https://lettersonmaterials.com/en/Readers/Article.aspx?aid=9908" target="_blank" >https://lettersonmaterials.com/en/Readers/Article.aspx?aid=9908</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.22226/2410-3535-2018-4-517-523" target="_blank" >10.22226/2410-3535-2018-4-517-523</a>

Result language

angličtina

Original language name

Influence of strain rate on deformation behaviour of an AX52 alloy processed by equal channel angular pressing (ECAP)

Original language description

Cast AX52 magnesium alloy with Al and Ca was processed by equal channel angular pressing (ECAP) using A route and 1-8 passes. The light and electron microscopy revealed a substantial microstructure refinement in the alloy. Al2Ca eutectics were found to be typical features of the microstructure. The ECAP procedure disintegrated eutectic particles. Miniaturized samples were cut from the ECAP-processed bulks. The samples with the tensile axis parallel to the extrusion direction were tested in tension at room temperature with initial strain rates of 0.001, 1, 10 and 50 s(-1). The offset yield stress increased with increasing number of passes. A rapid increase of deformation stresses was observed for the highest strain rate of 50 s-1. The activation volumes were estimated from the strain rate dependence of the offset yield stress. The strain rate sensitivity is influenced by the number of passes. A rapid increase of the activation volume at the highest strain rate indicates the change of the deformation mechanism. Limiting small values of the activation volume were found for the highest strain rates. Tensile tests at higher strain rates revealed unstable deformation behavior. This unstable deformation depends on the number of passes. Mechanisms operating at various strain rates are discussed in relation to the microstructure and number of ECAP passes.

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

20501 - Materials engineering

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

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

2410-3535

Volume of the periodical

8

Issue of the periodical within the volume

4

Country of publishing house

RU - RUSSIAN FEDERATION

Number of pages

7

Pages from-to

517-523

UT code for WoS article

000457554700003

EID of the result in the Scopus database

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