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

Kód výsledku v 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>

Nalezeny alternativní kódy

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

Výsledek na webu

<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>

Jazyk výsledku

angličtina

Název v původním jazyce

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

Popis výsledku v původním jazyce

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.

Název v anglickém jazyce

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

Popis výsledku anglicky

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.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

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OECD FORD obor

20501 - Materials engineering

Projekt

Výsledek vznikl pri realizaci vícero projektů. Více informací v záložce Projekty.

Návaznosti

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

Rok uplatnění

2018

Kód důvěrnosti údajů

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

Název periodika

LETTERS ON MATERIALS

ISSN

2218-5046

e-ISSN

2410-3535

Svazek periodika

8

Číslo periodika v rámci svazku

4

Stát vydavatele periodika

RU - Ruská federace

Počet stran výsledku

7

Strana od-do

517-523

Kód UT WoS článku

000457554700003

EID výsledku v databázi Scopus

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