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Statements

Subject Item
n2:RIV%2F61989100%3A27360%2F12%3A86084768%21RIV13-GA0-27360___
rdf:type
n17:Vysledek skos:Concept
dcterms:description
The influence of chemical composition on the deformation resistance of iron aluminides was studied by the plastometric tests on three types of Fe–40at.%Al based materials; especially the influence of zirconium and boron, respectively effect of fine TiB2 particles addition was investigated. All materials were prepared using the identical procedure (laboratory melting and casting under vacuum to the same cast’s shape), which is methodologically valuable. The same method of sampling, sample preparation and analogous testing conditions were used for subsequent experiments, which took place on identical Gleeble 3800 plastometer. The samples were pre-heated to a temperature of 1200 °C and then deformed at temperatures from 800 to 1200 °C, the nominal strain rate was 0.05 s-1, 0.4 s-1, 4 s-1 and 30 s-1. The activation energy values for hot forming of all three types of coarse-grained cast material (Fe-40Al, Fe-40Al-Zr-B, Fe-40Al+TiB2) were obtained from the peak values of stress-strain curves by the same methodology – multiple regression analysis of the known hyperbolic sine relation. The relationships describing the maximum deformation resistance of aluminides depending on the temperature-compensated strain rate, i.e. the Zener-Hollomon parameter were derived from obtained data. The values of activation energy and hot deformation resistance of the studied materials were compared and the differences interpreted in terms of physical-metallurgical effects of additives. The influence of chemical composition on the deformation resistance of iron aluminides was studied by the plastometric tests on three types of Fe–40at.%Al based materials; especially the influence of zirconium and boron, respectively effect of fine TiB2 particles addition was investigated. All materials were prepared using the identical procedure (laboratory melting and casting under vacuum to the same cast’s shape), which is methodologically valuable. The same method of sampling, sample preparation and analogous testing conditions were used for subsequent experiments, which took place on identical Gleeble 3800 plastometer. The samples were pre-heated to a temperature of 1200 °C and then deformed at temperatures from 800 to 1200 °C, the nominal strain rate was 0.05 s-1, 0.4 s-1, 4 s-1 and 30 s-1. The activation energy values for hot forming of all three types of coarse-grained cast material (Fe-40Al, Fe-40Al-Zr-B, Fe-40Al+TiB2) were obtained from the peak values of stress-strain curves by the same methodology – multiple regression analysis of the known hyperbolic sine relation. The relationships describing the maximum deformation resistance of aluminides depending on the temperature-compensated strain rate, i.e. the Zener-Hollomon parameter were derived from obtained data. The values of activation energy and hot deformation resistance of the studied materials were compared and the differences interpreted in terms of physical-metallurgical effects of additives.
dcterms:title
Effect of chemical composition on the behavior of selected iron aluminides Effect of chemical composition on the behavior of selected iron aluminides
skos:prefLabel
Effect of chemical composition on the behavior of selected iron aluminides Effect of chemical composition on the behavior of selected iron aluminides
skos:notation
RIV/61989100:27360/12:86084768!RIV13-GA0-27360___
n17:predkladatel
n18:orjk%3A27360
n3:aktivita
n19:S n19:P
n3:aktivity
P(ED0040/01/01), P(GAP107/10/0438), S
n3:dodaniDat
n11:2013
n3:domaciTvurceVysledku
n12:8067465 n12:8412189
n3:druhVysledku
n6:D
n3:duvernostUdaju
n13:S
n3:entitaPredkladatele
n9:predkladatel
n3:idSjednocenehoVysledku
132965
n3:idVysledku
RIV/61989100:27360/12:86084768
n3:jazykVysledku
n7:eng
n3:klicovaSlova
Iron aluminides, hot compression, stress-strain curves, activation energy, deformation resistance
n3:klicoveSlovo
n8:hot%20compression n8:deformation%20resistance n8:Iron%20aluminides n8:stress-strain%20curves n8:activation%20energy
n3:kontrolniKodProRIV
[9C92AEBBB71E]
n3:mistoKonaniAkce
Brno
n3:mistoVydani
Ostrava
n3:nazevZdroje
METAL 2012 : 21st International Conference on Metallurgy and Materials : conference proceedings
n3:obor
n15:JG
n3:pocetDomacichTvurcuVysledku
2
n3:pocetTvurcuVysledku
4
n3:projekt
n5:ED0040%2F01%2F01 n5:GAP107%2F10%2F0438
n3:rokUplatneniVysledku
n11:2012
n3:tvurceVysledku
Kopeček, Jaromír Šumšal, Václav Schindler, Ivo Šíma, Vladimír
n3:typAkce
n16:WRD
n3:zahajeniAkce
2012-05-23+02:00
s:numberOfPages
6
n21:hasPublisher
Tanger s.r.o.
n10:isbn
978-80-87294-31-4
n20:organizacniJednotka
27360