Superplastic deformation of fine-grained AE42 and LAE442 magnesium alloys

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11320%2F18%3A10389806" target="_blank" >RIV/00216208:11320/18:10389806 - isvavai.cz</a>

Výsledek na webu

<a href="https://doi.org/10.22226/2410-3535-2018-4-538-542" target="_blank" >https://doi.org/10.22226/2410-3535-2018-4-538-542</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.22226/2410-3535-2018-4-538-542" target="_blank" >10.22226/2410-3535-2018-4-538-542</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Superplastic deformation of fine-grained AE42 and LAE442 magnesium alloys

Popis výsledku v původním jazyce

In this paper, the possible superplastic behaviour of fine-grained magnesium alloys AE42 and LAE442 alloys was investigated and the first results of this research are shown. Two deformation temperatures and two strain rates were selected upon the initial measurement of thermal stability and dependence of m-parameter on strain rate and temperature. Evolution of m-parameter during the tensile tests was measured by means of periodical switching of the strain rate. The LAE442 alloy showed significantly higher elongations at the same deformation conditions as comparing to the AE42 alloy. The highest values of m-parameter in the last stage of deformation were measured at the temperature of 240 degrees C and strain rate of 10(-4) s(-1), regardless much higher grain growth comparing to deformation at 180 degrees C. Consequently, deformation of about 1.5 (350 %) and 1.3 (270 %) was measured for LAE442 and AE42 alloys, respectively. Higher values of m-parameter during the deformation and consequently higher elongation observed in LAE442 alloy were attributed to a combination of higher thermal stability and the positive effect of lithium on the activation of non-basal slip systems and diffusion.

Název v anglickém jazyce

Superplastic deformation of fine-grained AE42 and LAE442 magnesium alloys

Popis výsledku anglicky

In this paper, the possible superplastic behaviour of fine-grained magnesium alloys AE42 and LAE442 alloys was investigated and the first results of this research are shown. Two deformation temperatures and two strain rates were selected upon the initial measurement of thermal stability and dependence of m-parameter on strain rate and temperature. Evolution of m-parameter during the tensile tests was measured by means of periodical switching of the strain rate. The LAE442 alloy showed significantly higher elongations at the same deformation conditions as comparing to the AE42 alloy. The highest values of m-parameter in the last stage of deformation were measured at the temperature of 240 degrees C and strain rate of 10(-4) s(-1), regardless much higher grain growth comparing to deformation at 180 degrees C. Consequently, deformation of about 1.5 (350 %) and 1.3 (270 %) was measured for LAE442 and AE42 alloys, respectively. Higher values of m-parameter during the deformation and consequently higher elongation observed in LAE442 alloy were attributed to a combination of higher thermal stability and the positive effect of lithium on the activation of non-basal slip systems and diffusion.

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/GB14-36566G" target="_blank" >GB14-36566G: Multidisciplinární výzkumné centrum moderních materiálů</a><br>

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

—

Svazek periodika

8

Číslo periodika v rámci svazku

4

Stát vydavatele periodika

RU - Ruská federace

Počet stran výsledku

5

Strana od-do

538-542

Kód UT WoS článku

000457554700006

EID výsledku v databázi Scopus

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