Microstructure and mechanical properties of Ti-45Al-2W-xC alloys
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61989100%3A27360%2F22%3A10250533" target="_blank" >RIV/61989100:27360/22:10250533 - isvavai.cz</a>
Result on the web
<a href="https://www.sciencedirect.com/science/article/pii/S0966979522001595?via%3Dihub" target="_blank" >https://www.sciencedirect.com/science/article/pii/S0966979522001595?via%3Dihub</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1016/j.intermet.2022.107618" target="_blank" >10.1016/j.intermet.2022.107618</a>
Alternative languages
Result language
angličtina
Original language name
Microstructure and mechanical properties of Ti-45Al-2W-xC alloys
Original language description
The microstructure and mechanical properties of five alloys with nominal compositions of Ti-45Al-2W-xC (in at. %), where x is ranging from 0.4 to 2.0 at.%, were studied. The alloys were prepared by vacuum induction melting in graphite crucibles, followed by centrifugal casting into a graphite mould. The as-cast alloys were subjected to hot isostatic pressing and heat treatment consisting of solution annealing, cooling at a constant rate and stabilisation annealing. The microstructure of the heat-treated alloys consists of equiaxed alpha 2(Ti3Al) + gamma(TiAl) lamellar grains surrounded by gamma grain boundaries with a small amount of beta/B2 particles. The alpha 2-alpha 2 interlamellar spacing lambda decreases with increasing carbon content until a solubility limit of carbon is achieved. The increase in carbon content above the solubility limit leads to the formation of primary Ti2AlC particles during solidification and an increase in the amount of gamma phase at grain boundaries. Vickers microhardness of lamellar grains depends on the carbon content and interlamellar spacing lambda. The studied Ti-45Al-2W-0.8C and Ti-45Al-2W-1.2C alloys show improved creep resistance at 800 degrees C compared to that of the reference carbon-free TiAl-W and carbon-containing TiAl-Nb based alloys with fully lamellar, nearly lamellar, convoluted or pseudo-duplex microstructure.
Czech name
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Czech description
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Classification
Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
20501 - Materials engineering
Result continuities
Project
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Continuities
V - Vyzkumna aktivita podporovana z jinych verejnych zdroju
Others
Publication year
2022
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Intermetallics
ISSN
0966-9795
e-ISSN
1879-0216
Volume of the periodical
148
Issue of the periodical within the volume
SEP 2022
Country of publishing house
GB - UNITED KINGDOM
Number of pages
11
Pages from-to
nestrankovano
UT code for WoS article
000820167800001
EID of the result in the Scopus database
2-s2.0-85132900402