Influence of high-pressure torsion on microstructure, hardness and shear strength of AM60 magnesium alloy

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61389005%3A_____%2F21%3A00540444" target="_blank" >RIV/61389005:_____/21:00540444 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/00216208:11320/21:10437540

Výsledek na webu

<a href="https://doi.org/10.1016/j.msea.2020.140158" target="_blank" >https://doi.org/10.1016/j.msea.2020.140158</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.msea.2020.140158" target="_blank" >10.1016/j.msea.2020.140158</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Influence of high-pressure torsion on microstructure, hardness and shear strength of AM60 magnesium alloy

Popis výsledku v původním jazyce

The evolution of the microstructure, crystallographic texture and hardness of an AM60 magnesium alloy was studied in the center and the edge parts of disks processed by high-pressure torsion (HPT) technique at room temperature. In addition, the mechanical properties were also tested by shear punch test (SPT). The number of HPT turns varied between ½ and 10. It was found that the grain size of the initial extruded material (∼16 μm) decreased to ∼2 and ∼0.8 μm at the disk center and edge, respectively, even after ½ turn of HPT. Ten turns of HPT resulted in further grain refinement to ∼1 and ∼0.23 μm at the disk center and edge, respectively. The dislocation density saturated even after ½ turn with the value of ∼11 × 1014 m−2. The maximum value of the hardness was ∼1300 MPa that was measured at the edge of the disk deformed for ½ turn. Despite the practically unchanged grain size and dislocation density, the hardness decreased between 3 and 10 turns which can be explained by texture softening. A good agreement was observed between the yield strength estimated as one-third of the hardness and the values calculated from the dislocation density, grain size and texture. The difference between the microstructure and hardness obtained for AM60 samples processed by HPT and equal channel angular pressing (ECAP) is discussed.

Název v anglickém jazyce

Influence of high-pressure torsion on microstructure, hardness and shear strength of AM60 magnesium alloy

Popis výsledku anglicky

The evolution of the microstructure, crystallographic texture and hardness of an AM60 magnesium alloy was studied in the center and the edge parts of disks processed by high-pressure torsion (HPT) technique at room temperature. In addition, the mechanical properties were also tested by shear punch test (SPT). The number of HPT turns varied between ½ and 10. It was found that the grain size of the initial extruded material (∼16 μm) decreased to ∼2 and ∼0.8 μm at the disk center and edge, respectively, even after ½ turn of HPT. Ten turns of HPT resulted in further grain refinement to ∼1 and ∼0.23 μm at the disk center and edge, respectively. The dislocation density saturated even after ½ turn with the value of ∼11 × 1014 m−2. The maximum value of the hardness was ∼1300 MPa that was measured at the edge of the disk deformed for ½ turn. Despite the practically unchanged grain size and dislocation density, the hardness decreased between 3 and 10 turns which can be explained by texture softening. A good agreement was observed between the yield strength estimated as one-third of the hardness and the values calculated from the dislocation density, grain size and texture. The difference between the microstructure and hardness obtained for AM60 samples processed by HPT and equal channel angular pressing (ECAP) is discussed.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

20501 - Materials engineering

Projekt

<a href="/cs/project/EF16_013%2F0001794" target="_blank" >EF16_013/0001794: European Spallation Source - účast České republiky - OP</a><br>

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 and Engineering A Structural Materials Properties Microstructure and Processing

ISSN

0921-5093

e-ISSN

1873-4936

Svazek periodika

799

Číslo periodika v rámci svazku

JAN

Stát vydavatele periodika

CH - Švýcarská konfederace

Počet stran výsledku

12

Strana od-do

140158

Kód UT WoS článku

000626533700002

EID výsledku v databázi Scopus

2-s2.0-85090200263