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Statements

Subject Item
n2:RIV%2F68081723%3A_____%2F14%3A00434812%21RIV15-GA0-68081723
rdf:type
n5:Vysledek skos:Concept
dcterms:description
Additions of carbon and carbide-forming elements can positively influence high temperature mechanical properties of alloys based on Fe3Al intermetallic compound. In the present study, the effect of vanadium and carbon additions on creep resistance of Fe3Al-type alloys is investigated. The alloys contained (atomic %) (i) 27.0 % Al, 1.17 % V, 0.02 % C and (ii) 27.0 % Al, 1.13 % V, 0.73 % C (Fe balance). Creep was tested by uniaxial compressive tests at constant load with stepwise loading: in each step, the load was changed to a new value after steady-state creep rate had been established. The applied stress dependences of the creep rate at different temperatures were analyzed in terms of stress exponent n and activation energy Q. The constant-deflection mode of the small punch test was used to estimate other mechanical and fracture properties and their temperature dependence. The yield force and the maximum force were evaluated from the force vs. deflection dependence and compared with the corresponding quantities resulting from conventional tests, i.e. the yield stress and the ultimate tensile strength. Equivalent fracture strain was evaluated from both small punch test data and microscopic observation of fractured specimens. Fractographic observations of ruptured specimens were performed with scanning electron microscope. Additions of carbon and carbide-forming elements can positively influence high temperature mechanical properties of alloys based on Fe3Al intermetallic compound. In the present study, the effect of vanadium and carbon additions on creep resistance of Fe3Al-type alloys is investigated. The alloys contained (atomic %) (i) 27.0 % Al, 1.17 % V, 0.02 % C and (ii) 27.0 % Al, 1.13 % V, 0.73 % C (Fe balance). Creep was tested by uniaxial compressive tests at constant load with stepwise loading: in each step, the load was changed to a new value after steady-state creep rate had been established. The applied stress dependences of the creep rate at different temperatures were analyzed in terms of stress exponent n and activation energy Q. The constant-deflection mode of the small punch test was used to estimate other mechanical and fracture properties and their temperature dependence. The yield force and the maximum force were evaluated from the force vs. deflection dependence and compared with the corresponding quantities resulting from conventional tests, i.e. the yield stress and the ultimate tensile strength. Equivalent fracture strain was evaluated from both small punch test data and microscopic observation of fractured specimens. Fractographic observations of ruptured specimens were performed with scanning electron microscope.
dcterms:title
Creep of Fe3Al alloys with addition of vanadium Creep of Fe3Al alloys with addition of vanadium
skos:prefLabel
Creep of Fe3Al alloys with addition of vanadium Creep of Fe3Al alloys with addition of vanadium
skos:notation
RIV/68081723:_____/14:00434812!RIV15-GA0-68081723
n3:aktivita
n4:P n4:I
n3:aktivity
I, P(GAP108/12/1452)
n3:dodaniDat
n11:2015
n3:domaciTvurceVysledku
n9:9085130 n9:2831570
n3:druhVysledku
n8:O
n3:duvernostUdaju
n14:S
n3:entitaPredkladatele
n13:predkladatel
n3:idSjednocenehoVysledku
9172
n3:idVysledku
RIV/68081723:_____/14:00434812
n3:jazykVysledku
n10:eng
n3:klicovaSlova
creep; iron aluminide; carbide
n3:klicoveSlovo
n12:iron%20aluminide n12:carbide n12:creep
n3:kontrolniKodProRIV
[0B33B72AE0C1]
n3:obor
n15:JG
n3:pocetDomacichTvurcuVysledku
2
n3:pocetTvurcuVysledku
4
n3:projekt
n7:GAP108%2F12%2F1452
n3:rokUplatneniVysledku
n11:2014
n3:tvurceVysledku
Torun, O. Çelikyürek, I. Dymáček, Petr Dobeš, Ferdinand