Processing and Microstructure of As-Cast 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%3A10250350" target="_blank" >RIV/61989100:27360/22:10250350 - isvavai.cz</a>
Result on the web
<a href="https://www.mdpi.com/1996-1944/15/14/5049" target="_blank" >https://www.mdpi.com/1996-1944/15/14/5049</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.3390/ma15145049" target="_blank" >10.3390/ma15145049</a>
Alternative languages
Result language
angličtina
Original language name
Processing and Microstructure of As-Cast Ti-45Al-2W-xC Alloys
Original language description
The metallurgical preparation and microstructure of as-cast Ti-45Al-2W-xC (in at.%) alloys were investigated. Five alloys with carbon content ranging from 0.38 to 1.96 at.% were prepared by vacuum induction melting (VIM) in graphite crucibles, followed by centrifugal casting into graphite moulds. A master 15W-85Al (at.%) alloy with a relatively low melting point and TiC powder were used to facilitate fast dissolution of W during VIM and to achieve the designed content of C in the as-cast alloys, respectively. The increase in the content of C affects the solidification path of the studied alloys. Differential thermal analysis (DTA) and microstructural observations show that the alloys with carbon content up to 0.75 at.% solidify with beta primary phase and their dendritic as-cast microstructure consists of the alpha(2)(Ti3Al) + gamma(TiAl) lamellar regions, retained B2 phase enriched by W and single gamma phase formed in the interdendritic region. The increase in the content of C above 0.75 at.% leads to the formation of primary lathe-shaped Ti2AlC carbides, which act as effective heterogeneous nucleation sites of beta dendrites during the solidification and grain refinement of the alloys with 1.15 and 1.96 at.% C. The increase in the content of C leads to an increase in Vickers hardness and elastic modulus in the alloys containing 1.96 at.% C.
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
<a href="/en/project/EF17_049%2F0008407" target="_blank" >EF17_049/0008407: Innovative and additive manufacturing technology - new technological solutions for 3D printing of metals and composite materials</a><br>
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)<br>S - Specificky vyzkum na vysokych skolach
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
Materials
ISSN
1996-1944
e-ISSN
1996-1944
Volume of the periodical
15
Issue of the periodical within the volume
14
Country of publishing house
CH - SWITZERLAND
Number of pages
15
Pages from-to
nestrankovano
UT code for WoS article
000833657900001
EID of the result in the Scopus database
2-s2.0-85137273583