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Statements

Subject Item
n2:RIV%2F00216208%3A11320%2F12%3A10130997%21RIV13-GA0-11320___
rdf:type
n6:Vysledek skos:Concept
dcterms:description
Promising potential of the Fe-40at.%Al type alloys is used only in a limited way as yet, mainly due to their high brittleness. With regard to attraction of the given type material, the plastometric research at temperatures 800 degrees C to 1200 degrees C was carried out as a basic one, namely using the uniaxial compression tests at strain rates 10(-2) s(-1) to 10(1) s(-1). Cylindrical samples were manufactured from laboratory castings, gained by means of the vacuum induction furnace. Two materials were tested - Fe-40Al and Fe-40Al+TiB2. From the measured flow stress curves the values of maximum stress were obtained and used for determination of the activation energy in hot forming according to the classical equation of the hyperbolic sine type. Enumeration of its parameters led to a possibility to predict maximum deformation resistance values of the investigated alloys in dependence on temperature and strain rate. Pronounced effect of the added titanium diboride particles (< 10 mu m) on the activation energy value and to a resistance to the formation of cracks was observed. Thanks to the obtained value of activation energy an equation sufficiently describing the initiation of dynamic recrystallization process in the Fe-40Al+TiB2 material as a function of the Zener-Hollomon parameter could be derived. Promising potential of the Fe-40at.%Al type alloys is used only in a limited way as yet, mainly due to their high brittleness. With regard to attraction of the given type material, the plastometric research at temperatures 800 degrees C to 1200 degrees C was carried out as a basic one, namely using the uniaxial compression tests at strain rates 10(-2) s(-1) to 10(1) s(-1). Cylindrical samples were manufactured from laboratory castings, gained by means of the vacuum induction furnace. Two materials were tested - Fe-40Al and Fe-40Al+TiB2. From the measured flow stress curves the values of maximum stress were obtained and used for determination of the activation energy in hot forming according to the classical equation of the hyperbolic sine type. Enumeration of its parameters led to a possibility to predict maximum deformation resistance values of the investigated alloys in dependence on temperature and strain rate. Pronounced effect of the added titanium diboride particles (< 10 mu m) on the activation energy value and to a resistance to the formation of cracks was observed. Thanks to the obtained value of activation energy an equation sufficiently describing the initiation of dynamic recrystallization process in the Fe-40Al+TiB2 material as a function of the Zener-Hollomon parameter could be derived.
dcterms:title
Activation Energy in Hot Forming of Selected Fe-40at.%Al Type Intermetallic Compounds Activation Energy in Hot Forming of Selected Fe-40at.%Al Type Intermetallic Compounds
skos:prefLabel
Activation Energy in Hot Forming of Selected Fe-40at.%Al Type Intermetallic Compounds Activation Energy in Hot Forming of Selected Fe-40at.%Al Type Intermetallic Compounds
skos:notation
RIV/00216208:11320/12:10130997!RIV13-GA0-11320___
n6:predkladatel
n12:orjk%3A11320
n4:aktivita
n10:P n10:Z
n4:aktivity
P(ED0040/01/01), P(GAP107/10/0438), Z(MSM6198910015)
n4:cisloPeriodika
3
n4:dodaniDat
n17:2013
n4:domaciTvurceVysledku
n8:9398376 n8:8093512
n4:druhVysledku
n13:J
n4:duvernostUdaju
n15:S
n4:entitaPredkladatele
n11:predkladatel
n4:idSjednocenehoVysledku
120943
n4:idVysledku
RIV/00216208:11320/12:10130997
n4:jazykVysledku
n20:eng
n4:klicovaSlova
flow; steel; deformation; superplasticity; alloys
n4:klicoveSlovo
n7:superplasticity n7:alloys n7:flow n7:deformation n7:steel
n4:kodStatuVydavatele
PL - Polská republika
n4:kontrolniKodProRIV
[E1C25F020FF9]
n4:nazevZdroje
Acta Physica Polonica A
n4:obor
n18:BM
n4:pocetDomacichTvurcuVysledku
2
n4:pocetTvurcuVysledku
6
n4:projekt
n9:GAP107%2F10%2F0438 n9:ED0040%2F01%2F01
n4:rokUplatneniVysledku
n17:2012
n4:svazekPeriodika
122
n4:tvurceVysledku
Kratochvíl, Petr Kulveitova, H. Schindler, I. Knapinski, M. Šíma, Vladimír Kawulok, R.
n4:wos
000309019200046
n4:zamer
n19:MSM6198910015
s:issn
0587-4246
s:numberOfPages
4
n16:organizacniJednotka
11320