Excellent superplastic properties achieved in Mg-4Y-3RE alloy in high strain rate regime

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11320%2F20%3A10423327" target="_blank" >RIV/00216208:11320/20:10423327 - isvavai.cz</a>

Výsledek na webu

<a href="https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=qEIAMLno2X" target="_blank" >https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=qEIAMLno2X</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.msea.2020.139314" target="_blank" >10.1016/j.msea.2020.139314</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Excellent superplastic properties achieved in Mg-4Y-3RE alloy in high strain rate regime

Popis výsledku v původním jazyce

This study is focused on high strain rate superplasticity of commercial magnesium alloy Mg-4Y-3RE (WE43) in ultrafine-grained condition prepared by equal channel angular pressing (ECAP). Attaining microstructure with the average grain size of similar to 340 nm and high density of secondary phase particles provided a possibility to significantly decrease temperature during the deformation at strain rates of 10(-2 )s(-1) and 10(-1) s(-1) in comparison with previous studies. Consequently, extent of negative effect of grain growth was partially suppressed and the investigated alloy did exhibit exceptionally high deformability with a maximum elongation of similar to 1230% at strain rate of 10(-2) s(-1) and at two temperatures: 350 degrees C and 400 degrees C. Increase in the strain rate to 10(-1) s(-1) resulted in maximum elongation of similar to 1000% at the temperature of 400 degrees C. The microstructural analysis after the deformation showed that the microstructure was fine-grained even after large deformation and plasticity-controlled growth of cavities did occur only at the temperature of 450 degrees C. The optimization of ECAP processing resulted in very weak texture and, therefore, the deformability should be more isotropic in comparison with strongly textured materials usually investigated in this regard.

Název v anglickém jazyce

Excellent superplastic properties achieved in Mg-4Y-3RE alloy in high strain rate regime

Popis výsledku anglicky

This study is focused on high strain rate superplasticity of commercial magnesium alloy Mg-4Y-3RE (WE43) in ultrafine-grained condition prepared by equal channel angular pressing (ECAP). Attaining microstructure with the average grain size of similar to 340 nm and high density of secondary phase particles provided a possibility to significantly decrease temperature during the deformation at strain rates of 10(-2 )s(-1) and 10(-1) s(-1) in comparison with previous studies. Consequently, extent of negative effect of grain growth was partially suppressed and the investigated alloy did exhibit exceptionally high deformability with a maximum elongation of similar to 1230% at strain rate of 10(-2) s(-1) and at two temperatures: 350 degrees C and 400 degrees C. Increase in the strain rate to 10(-1) s(-1) resulted in maximum elongation of similar to 1000% at the temperature of 400 degrees C. The microstructural analysis after the deformation showed that the microstructure was fine-grained even after large deformation and plasticity-controlled growth of cavities did occur only at the temperature of 450 degrees C. The optimization of ECAP processing resulted in very weak texture and, therefore, the deformability should be more isotropic in comparison with strongly textured materials usually investigated in this regard.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

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

Projekt

<a href="/cs/project/GA19-00270S" target="_blank" >GA19-00270S: Zlepšení mechanických vlastností ultrajemnozrnných hořčíkových slitin na základě modifikace textury</a><br>

Návaznosti

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

Rok uplatnění

2020

Kód důvěrnosti údajů

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

Název periodika

Materials Science &amp; Engineering A: Structural Materials: Properties, Microstructure and Processing

ISSN

0921-5093

e-ISSN

—

Svazek periodika

784

Číslo periodika v rámci svazku

duben

Stát vydavatele periodika

CH - Švýcarská konfederace

Počet stran výsledku

7

Strana od-do

139314

Kód UT WoS článku

000531017900011

EID výsledku v databázi Scopus

2-s2.0-85082862888