Hot deformation behaviour and microstructure evolution of TiAl-based alloy reinforced with carbide particles

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61989100%3A27360%2F20%3A10246452" target="_blank" >RIV/61989100:27360/20:10246452 - isvavai.cz</a>

Výsledek na webu

<a href="https://www.sciencedirect.com/science/article/pii/S0966979520308669" target="_blank" >https://www.sciencedirect.com/science/article/pii/S0966979520308669</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.intermet.2020.106962" target="_blank" >10.1016/j.intermet.2020.106962</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Hot deformation behaviour and microstructure evolution of TiAl-based alloy reinforced with carbide particles

Popis výsledku v původním jazyce

The hot deformation behaviour and microstructure evolution of TiAl-based alloy with nominal composition TT 43Al-8Nb-3.6C-0.7Mo (at.%) reinforced with carbide particles were studied. The compression tests were carried out in the temperature range from 900 to 1000 degrees C and strain rates from 0.0001 to 0.01 s(-1) up to a true strain of 0.5. The microstructure of the compression specimens was characterised using scanning electron microscopy (SEM), transmission electron microscopy (TEM), and electron backscatter diffraction (EBSD). The work hardening stage of the flow curves results from an increment of the dislocation density and deformation twins. The work softening of the composite results from the dynamic recovery (DRV), dynamic recrystallization (DRX) and fragmentation of some coarse Ti2AlC particles. The size of recrystallised grains increases with decreasing Zener-Hollomon parameter. The non-uniform distribution of local strains in the deformed specimens and deformation temperature affect the orientation and fragmentation of coarse Ti2AlC particles. A constitutive model predicting hot deformation behaviour of the studied alloy is proposed and its validity is evaluated and discussed.

Název v anglickém jazyce

Hot deformation behaviour and microstructure evolution of TiAl-based alloy reinforced with carbide particles

Popis výsledku anglicky

The hot deformation behaviour and microstructure evolution of TiAl-based alloy with nominal composition TT 43Al-8Nb-3.6C-0.7Mo (at.%) reinforced with carbide particles were studied. The compression tests were carried out in the temperature range from 900 to 1000 degrees C and strain rates from 0.0001 to 0.01 s(-1) up to a true strain of 0.5. The microstructure of the compression specimens was characterised using scanning electron microscopy (SEM), transmission electron microscopy (TEM), and electron backscatter diffraction (EBSD). The work hardening stage of the flow curves results from an increment of the dislocation density and deformation twins. The work softening of the composite results from the dynamic recovery (DRV), dynamic recrystallization (DRX) and fragmentation of some coarse Ti2AlC particles. The size of recrystallised grains increases with decreasing Zener-Hollomon parameter. The non-uniform distribution of local strains in the deformed specimens and deformation temperature affect the orientation and fragmentation of coarse Ti2AlC particles. A constitutive model predicting hot deformation behaviour of the studied alloy is proposed and its validity is evaluated and discussed.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

20500 - Materials engineering

Projekt

—

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2020

Kód důvěrnosti údajů

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

Název periodika

Intermetallics

ISSN

0966-9795

e-ISSN

—

Svazek periodika

127

Číslo periodika v rámci svazku

prosinec 2020

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

12

Strana od-do

106962

Kód UT WoS článku

000587915700007

EID výsledku v databázi Scopus

2-s2.0-85091970118