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Statements

Subject Item
n2:RIV%2F61989100%3A27360%2F14%3A86092418%21RIV15-MSM-27360___
rdf:type
n19:Vysledek skos:Concept
rdfs:seeAlso
http://mit.imt.si/Revija/izvodi/mit146/cegan.pdf
dcterms:description
The gama-TiAl intermetallics with and without amount fractions x = 0.3 % of yttrium and with different carbon amount fractions ranging from 0.9 % to 1.6 % were prepared by vacuum-induction melting in a graphite crucible. Different amounts of carbon were obtained by varying the time of melting. The resulting samples had large rod-like carbides with volume fractions 0.6 % to 3.7 % Ti2AlC in the lamellar matrix consisting of the alternating lamellas of gama-TiAl and alfa2-Ti3Al phases. It was found that the grain size of the matrix decreases with the increasing volume fraction of Ti2AlC carbides from 430 µm to 35 µm. In addition, finer carbides with a similar composition were observed. Their size was below 1 µm and they appear mainly at the grain boundaries and also inside the lamellar grains. Compression testing revealed that all the samples had a relatively high yield strength at elevated temperature, from 917 MPa to 623 MPa at 600 °C and from 608 MPa to 547 MPa at 800 °C, but the best strength and the best yield strength were found for the sample with the lowest amount of the large rod-like Ti2AlC carbides. From these results it is concluded that the strengthening at an elevated temperature is a result of C in the solid solution and small carbide precipitates rather than of the rod-like Ti2AlC carbides. The gama-TiAl intermetallics with and without amount fractions x = 0.3 % of yttrium and with different carbon amount fractions ranging from 0.9 % to 1.6 % were prepared by vacuum-induction melting in a graphite crucible. Different amounts of carbon were obtained by varying the time of melting. The resulting samples had large rod-like carbides with volume fractions 0.6 % to 3.7 % Ti2AlC in the lamellar matrix consisting of the alternating lamellas of gama-TiAl and alfa2-Ti3Al phases. It was found that the grain size of the matrix decreases with the increasing volume fraction of Ti2AlC carbides from 430 µm to 35 µm. In addition, finer carbides with a similar composition were observed. Their size was below 1 µm and they appear mainly at the grain boundaries and also inside the lamellar grains. Compression testing revealed that all the samples had a relatively high yield strength at elevated temperature, from 917 MPa to 623 MPa at 600 °C and from 608 MPa to 547 MPa at 800 °C, but the best strength and the best yield strength were found for the sample with the lowest amount of the large rod-like Ti2AlC carbides. From these results it is concluded that the strengthening at an elevated temperature is a result of C in the solid solution and small carbide precipitates rather than of the rod-like Ti2AlC carbides.
dcterms:title
Effect of Ti2AlC particles on the microstructure and elevated-temperature-deformation properties of gama-TiAl alloys Effect of Ti2AlC particles on the microstructure and elevated-temperature-deformation properties of gama-TiAl alloys
skos:prefLabel
Effect of Ti2AlC particles on the microstructure and elevated-temperature-deformation properties of gama-TiAl alloys Effect of Ti2AlC particles on the microstructure and elevated-temperature-deformation properties of gama-TiAl alloys
skos:notation
RIV/61989100:27360/14:86092418!RIV15-MSM-27360___
n3:aktivita
n4:S n4:P
n3:aktivity
P(ED0040/01/01), P(LO1203), S
n3:cisloPeriodika
6
n3:dodaniDat
n9:2015
n3:domaciTvurceVysledku
n5:3111636 n5:8086702 n5:8478279 n5:2792222 n5:6608787 n5:6958168
n3:druhVysledku
n8:J
n3:duvernostUdaju
n12:S
n3:entitaPredkladatele
n18:predkladatel
n3:idSjednocenehoVysledku
13580
n3:idVysledku
RIV/61989100:27360/14:86092418
n3:jazykVysledku
n17:eng
n3:klicovaSlova
carbon; carbides; microstructure; mechanical properties; titanium aluminides
n3:klicoveSlovo
n10:carbides n10:mechanical%20properties n10:microstructure n10:carbon n10:titanium%20aluminides
n3:kodStatuVydavatele
SI - Slovinská republika
n3:kontrolniKodProRIV
[8400CF4B5F1D]
n3:nazevZdroje
Materiali in tehnologije
n3:obor
n13:JG
n3:pocetDomacichTvurcuVysledku
6
n3:pocetTvurcuVysledku
7
n3:projekt
n14:ED0040%2F01%2F01 n14:LO1203
n3:rokUplatneniVysledku
n9:2014
n3:svazekPeriodika
48
n3:tvurceVysledku
Rusz, Stanislav Čegan, Tomáš Kursa, Miroslav Vontorová, Jiřina Kawulok, Petr Cagala, Michal Juřica, Jan
n3:wos
000348407500006
s:issn
1580-2949
s:numberOfPages
5
n6:organizacniJednotka
27360