Effect of heat-treatment on the microstructure and fatigue properties of lamellar γ-TiAl alloyed with Nb, Mo and/or C

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68081723%3A_____%2F20%3A00524225" target="_blank" >RIV/68081723:_____/20:00524225 - isvavai.cz</a>

Výsledek na webu

<a href="https://doi.org/10.1016/j.msea.2020.139427" target="_blank" >https://doi.org/10.1016/j.msea.2020.139427</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.msea.2020.139427" target="_blank" >10.1016/j.msea.2020.139427</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Effect of heat-treatment on the microstructure and fatigue properties of lamellar γ-TiAl alloyed with Nb, Mo and/or C

Popis výsledku v původním jazyce

In this study, the effect of the heat-treatment was investigated on five different γ-TiAl compositions alloyed withn7 at.% of Nb and varying content of Mo and C. Mechanical properties of as-received and heat-treated alloys werenassessed using tensile and symmetrical tension-compression cyclic loading at room temperature and 750 °C.nScanning electron microscopy, electron back-scatter and X-ray powder diffraction, as well as high-resolutionnscanning transmission electron microscopy, were used to characterize microstructural changes induced by thenheat-treatments. Modification of lamellar substructure in terms of a significant decrease of lamellar spacingndirectly affects the mobility of dislocations. Together with the change in the phase composition of the alloys, it isnthe key mechanism leading to the improvement of the ultimate tensile stress, fracture plastic strain as well asnhigher cyclic strength. It also increases the cumulative plastic strain in cyclic loading both at ambient andnelevated temperatures.

Název v anglickém jazyce

Effect of heat-treatment on the microstructure and fatigue properties of lamellar γ-TiAl alloyed with Nb, Mo and/or C

Popis výsledku anglicky

In this study, the effect of the heat-treatment was investigated on five different γ-TiAl compositions alloyed withn7 at.% of Nb and varying content of Mo and C. Mechanical properties of as-received and heat-treated alloys werenassessed using tensile and symmetrical tension-compression cyclic loading at room temperature and 750 °C.nScanning electron microscopy, electron back-scatter and X-ray powder diffraction, as well as high-resolutionnscanning transmission electron microscopy, were used to characterize microstructural changes induced by thenheat-treatments. Modification of lamellar substructure in terms of a significant decrease of lamellar spacingndirectly affects the mobility of dislocations. Together with the change in the phase composition of the alloys, it isnthe key mechanism leading to the improvement of the ultimate tensile stress, fracture plastic strain as well asnhigher cyclic strength. It also increases the cumulative plastic strain in cyclic loading both at ambient andnelevated temperatures.

Druh

J_SC - Článek v periodiku v databázi SCOPUS

CEP obor

—

OECD FORD obor

20501 - Materials engineering

Projekt

<a href="/cs/project/LQ1601" target="_blank" >LQ1601: CEITEC 2020</a><br>

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

Materials Science and Engineering A-Structural materials

ISSN

0921-5093

e-ISSN

—

Svazek periodika

786

Číslo periodika v rámci svazku

JUN

Stát vydavatele periodika

CH - Švýcarská konfederace

Počet stran výsledku

12

Strana od-do

139427

Kód UT WoS článku

000541737900026

EID výsledku v databázi Scopus

2-s2.0-85084113079