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Statements

Subject Item
n2:RIV%2F68081723%3A_____%2F14%3A00397330%21RIV15-GA0-68081723
rdf:type
skos:Concept n19:Vysledek
dcterms:description
The subject of the article is focused on the refining of the cast structure of gamma TiAl-2Nb alloy using cyclic heat treatment and on the analysis of the grain refining mechanism. Microstructure evolution after applied cycles of heat treatment was characterized using light, laser and electron microscopy and using microhardness tests. Application of five heat treatment cycles during which two phase transformations (eutectoid and alpha-recrystallization reactions) repeatedly took place resulted in refining of the cast columnar structure. The mean grain-lamellar colony size 512 micrometers was transformed to fully lamellar structure containing gamma and alpha2 phases having the mean grain size 229 micrometers. Lamellae thickness of gamma was not changed while the thickness of alpha2 phase decreased to 78 nm. Refining of alpha2 phase resulted in the increase of the microhardness by 20 %. The recrystallized cast structure obtained by cyclic heat treatment and the knowledge on the mechanisms of the refining the structure were compared and discussed with the literature data. The subject of the article is focused on the refining of the cast structure of gamma TiAl-2Nb alloy using cyclic heat treatment and on the analysis of the grain refining mechanism. Microstructure evolution after applied cycles of heat treatment was characterized using light, laser and electron microscopy and using microhardness tests. Application of five heat treatment cycles during which two phase transformations (eutectoid and alpha-recrystallization reactions) repeatedly took place resulted in refining of the cast columnar structure. The mean grain-lamellar colony size 512 micrometers was transformed to fully lamellar structure containing gamma and alpha2 phases having the mean grain size 229 micrometers. Lamellae thickness of gamma was not changed while the thickness of alpha2 phase decreased to 78 nm. Refining of alpha2 phase resulted in the increase of the microhardness by 20 %. The recrystallized cast structure obtained by cyclic heat treatment and the knowledge on the mechanisms of the refining the structure were compared and discussed with the literature data.
dcterms:title
Effect of Cyclic Heat Treatment on Cast Structure of TiAl Alloy Effect of Cyclic Heat Treatment on Cast Structure of TiAl Alloy
skos:prefLabel
Effect of Cyclic Heat Treatment on Cast Structure of TiAl Alloy Effect of Cyclic Heat Treatment on Cast Structure of TiAl Alloy
skos:notation
RIV/68081723:_____/14:00397330!RIV15-GA0-68081723
n3:aktivita
n13:I n13:P
n3:aktivity
I, P(GAP107/11/0704)
n3:dodaniDat
n7:2015
n3:domaciTvurceVysledku
n16:1204726 n16:3491870
n3:druhVysledku
n8:D
n3:duvernostUdaju
n17:S
n3:entitaPredkladatele
n21:predkladatel
n3:idSjednocenehoVysledku
13210
n3:idVysledku
RIV/68081723:_____/14:00397330
n3:jazykVysledku
n9:eng
n3:klicovaSlova
TiAl alloy; cyclic heat treatment; refined cast structure; discontinuous coarsening; microhardness
n3:klicoveSlovo
n5:TiAl%20alloy n5:microhardness n5:refined%20cast%20structure n5:cyclic%20heat%20treatment n5:discontinuous%20coarsening
n3:kontrolniKodProRIV
[E561288816CC]
n3:mistoKonaniAkce
Levoča
n3:mistoVydani
Zurich
n3:nazevZdroje
Local Mechanical Properties IX
n3:obor
n20:JL
n3:pocetDomacichTvurcuVysledku
2
n3:pocetTvurcuVysledku
4
n3:projekt
n14:GAP107%2F11%2F0704
n3:rokUplatneniVysledku
n7:2014
n3:tvurceVysledku
Petrenec, Martin Němec, K. Vraspírová, E. Heczko, Milan
n3:typAkce
n18:WRD
n3:wos
000336633500054
n3:zahajeniAkce
2012-11-07+01:00
s:issn
1013-9826
s:numberOfPages
4
n15:doi
10.4028/www.scientific.net/KEM.586.222
n6:hasPublisher
Trans Tech Publications
n12:isbn
978-3-03785-876-9