Achievement of fine-grained bimodal microstructures and superior mechanical properties in a multi-axially forged GWZ magnesium alloy containing LPSO structures

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11320%2F19%3A10407952" target="_blank" >RIV/00216208:11320/19:10407952 - isvavai.cz</a>

Výsledek na webu

<a href="https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=rthm7IPKDO" target="_blank" >https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=rthm7IPKDO</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.jallcom.2019.04.158" target="_blank" >10.1016/j.jallcom.2019.04.158</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Achievement of fine-grained bimodal microstructures and superior mechanical properties in a multi-axially forged GWZ magnesium alloy containing LPSO structures

Popis výsledku v původním jazyce

The effect of multiaxial forging on the microstructure and subsequent mechanical properties of Mg-8.1Gd-4.3Y-1.6Zn-0.4Zr (wt.%) alloy (GWZ) have been carefully examined at the isothermal temperature of 400 degrees C. A fine-grained and bimodal microstructure with an average grain size of 1 mu m developed after only one pass. It is observed that the blocky LPSO phases act as the particle stimulated nucleation mechanism. This leads to the development of a bimodal microstructure. It was also demonstrated that continuous dynamic recrystallization was one of the main grain refinement mechanisms. Furthermore, the transformation of blocky LPSO phases to lamellar ones in the third pass profoundly affected the subsequent mechanical properties. The presence of the lamellar phase not only increased the hardness of the processed microstructure through kinking, but also it was directly responsible for the achievement of the high hardness value around 120-170 HV. The superior mechanical properties of the processed materials, excellent ultimate tensile strength and ductility of 581 MPa and 15.9% respectively, were attributed to the ultra-fine grain microstructure with a high volume fraction of both blocky and lamellar LPSO phases. (C) 2019 Elsevier B.V. All rights reserved.

Název v anglickém jazyce

Achievement of fine-grained bimodal microstructures and superior mechanical properties in a multi-axially forged GWZ magnesium alloy containing LPSO structures

Popis výsledku anglicky

The effect of multiaxial forging on the microstructure and subsequent mechanical properties of Mg-8.1Gd-4.3Y-1.6Zn-0.4Zr (wt.%) alloy (GWZ) have been carefully examined at the isothermal temperature of 400 degrees C. A fine-grained and bimodal microstructure with an average grain size of 1 mu m developed after only one pass. It is observed that the blocky LPSO phases act as the particle stimulated nucleation mechanism. This leads to the development of a bimodal microstructure. It was also demonstrated that continuous dynamic recrystallization was one of the main grain refinement mechanisms. Furthermore, the transformation of blocky LPSO phases to lamellar ones in the third pass profoundly affected the subsequent mechanical properties. The presence of the lamellar phase not only increased the hardness of the processed microstructure through kinking, but also it was directly responsible for the achievement of the high hardness value around 120-170 HV. The superior mechanical properties of the processed materials, excellent ultimate tensile strength and ductility of 581 MPa and 15.9% respectively, were attributed to the ultra-fine grain microstructure with a high volume fraction of both blocky and lamellar LPSO phases. (C) 2019 Elsevier B.V. All rights reserved.

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

—

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2019

Kód důvěrnosti údajů

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

Název periodika

Journal of Alloys and Compounds

ISSN

0925-8388

e-ISSN

—

Svazek periodika

793

Číslo periodika v rámci svazku

1

Stát vydavatele periodika

CH - Švýcarská konfederace

Počet stran výsledku

12

Strana od-do

134-145

Kód UT WoS článku

000467696000016

EID výsledku v databázi Scopus

2-s2.0-85064510018