Investigation of shear and tensile mechanical properties of ZK60 Mg alloy sheet processed by rolling and sheet extrusion

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11320%2F21%3A10437715" target="_blank" >RIV/00216208:11320/21:10437715 - isvavai.cz</a>

Výsledek na webu

<a href="https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=mD67SeqWc2" target="_blank" >https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=mD67SeqWc2</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.msea.2021.142098" target="_blank" >10.1016/j.msea.2021.142098</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Investigation of shear and tensile mechanical properties of ZK60 Mg alloy sheet processed by rolling and sheet extrusion

Popis výsledku v původním jazyce

The microstructure, texture and mechanical behavior of two wrought ZK60 magnesium alloys were investigated by tensile test and shear punch test (SPT). The samples processed by hot rolling and the combination of hot rolling and sheet extrusion techniques. The mechanical properties of the alloys correlated to the microstructural characteristics and the texture. Microstructural analysis showed that extrusion transformed the equiaxed coarse grain structure of the rolled sample with an average grain size of 68 mu m to a bimodal structure including very fine dynamically recrystallized (DRX) grains, having an average grain size of similar to 2.8, and large elongated deformed grains. The sheet extrusion process improved the tensile yield stress, the ultimate tensile strength, the shear strength, and the tensile elongation to failure. The strength enhancement was attributed to the finer grain size and the change of the volume fraction of the secondary phase particles. It was demonstrated that extrusion could improve both strength and ductility at room temperature in wrought ZK60 alloy. Although the tensile ductility improved after extrusion, it was shown that deformability in SPT remains unchanged after extrusion. Micro structural observations show that in SPT the positive effect of the grain refinement on the ductility was compensated by the hindering effect of Mg4Zn7 particles on the glide of &lt;c+a&gt; pyramidal dislocations. This slip is a dominant mechanism of deformation during SPT due to the basal texture.

Název v anglickém jazyce

Investigation of shear and tensile mechanical properties of ZK60 Mg alloy sheet processed by rolling and sheet extrusion

Popis výsledku anglicky

The microstructure, texture and mechanical behavior of two wrought ZK60 magnesium alloys were investigated by tensile test and shear punch test (SPT). The samples processed by hot rolling and the combination of hot rolling and sheet extrusion techniques. The mechanical properties of the alloys correlated to the microstructural characteristics and the texture. Microstructural analysis showed that extrusion transformed the equiaxed coarse grain structure of the rolled sample with an average grain size of 68 mu m to a bimodal structure including very fine dynamically recrystallized (DRX) grains, having an average grain size of similar to 2.8, and large elongated deformed grains. The sheet extrusion process improved the tensile yield stress, the ultimate tensile strength, the shear strength, and the tensile elongation to failure. The strength enhancement was attributed to the finer grain size and the change of the volume fraction of the secondary phase particles. It was demonstrated that extrusion could improve both strength and ductility at room temperature in wrought ZK60 alloy. Although the tensile ductility improved after extrusion, it was shown that deformability in SPT remains unchanged after extrusion. Micro structural observations show that in SPT the positive effect of the grain refinement on the ductility was compensated by the hindering effect of Mg4Zn7 particles on the glide of &lt;c+a&gt; pyramidal dislocations. This slip is a dominant mechanism of deformation during SPT due to the basal texture.

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

2021

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

828

Číslo periodika v rámci svazku

09

Stát vydavatele periodika

CH - Švýcarská konfederace

Počet stran výsledku

10

Strana od-do

142098

Kód UT WoS článku

000704171300003

EID výsledku v databázi Scopus

2-s2.0-85115887833