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

Result code in 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>

Result on the web

<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>

Result language

angličtina

Original language name

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

Original language description

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.

Czech name

—

Czech description

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Type

J_SC - Article in a specialist periodical, which is included in the SCOPUS database

CEP classification

—

OECD FORD branch

20501 - Materials engineering

Project

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

Continuities

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year

2020

Confidentiality

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

Name of the periodical

Materials Science and Engineering A-Structural materials

ISSN

0921-5093

e-ISSN

—

Volume of the periodical

786

Issue of the periodical within the volume

JUN

Country of publishing house

CH - SWITZERLAND

Number of pages

12

Pages from-to

139427

UT code for WoS article

000541737900026

EID of the result in the Scopus database

2-s2.0-85084113079