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Statements

Subject Item
n2:RIV%2F68081723%3A_____%2F01%3A07013156%21RIV%2F2003%2FAV0%2FA07003%2FN
rdf:type
n7:Vysledek skos:Concept
dcterms:description
Interrupted compression creep tests were performed at 973 K and 350 MPa to study strain dependent microstructural changes in near-.gamma. equiaxed Ti-48A1-2Cr-2Nb-B alloy. Dislocation densities and volume fraction of deformation twins were measured in the range of strain where sharp creep rate minima occur. The steep decrease of creep rate during initial 1% of strain is associated with a considerable increase in density of ordinary dislocations and superdislocations. Twinning processes are rather limited during this primary stage. On the other hand, in the strain range of minimum creep rate the volume fraction of deformation twins grows due to the increasing number of twinned grains and decreasing spacing between individual twins. Based on these results it is suggested that, in the pure- and near-.gamma. TiAl equiaxed grain microstructures, the increase of creep rate after minimum and its new gradual saturation reflects a contribution of deformation twins to the creep strain accumulation kinetics. T Interrupted compression creep tests were performed at 973 K and 350 MPa to study strain dependent microstructural changes in near-.gamma. equiaxed Ti-48A1-2Cr-2Nb-B alloy. Dislocation densities and volume fraction of deformation twins were measured in the range of strain where sharp creep rate minima occur. The steep decrease of creep rate during initial 1% of strain is associated with a considerable increase in density of ordinary dislocations and superdislocations. Twinning processes are rather limited during this primary stage. On the other hand, in the strain range of minimum creep rate the volume fraction of deformation twins grows due to the increasing number of twinned grains and decreasing spacing between individual twins. Based on these results it is suggested that, in the pure- and near-.gamma. TiAl equiaxed grain microstructures, the increase of creep rate after minimum and its new gradual saturation reflects a contribution of deformation twins to the creep strain accumulation kinetics. T
dcterms:title
Dislocation Slip and Deformation Twinning Interplay during High Temperature Deformation in .gamma.-TiAl Base Intermetallics. Dislocation Slip and Deformation Twinning Interplay during High Temperature Deformation in .gamma.-TiAl Base Intermetallics.
skos:prefLabel
Dislocation Slip and Deformation Twinning Interplay during High Temperature Deformation in .gamma.-TiAl Base Intermetallics. Dislocation Slip and Deformation Twinning Interplay during High Temperature Deformation in .gamma.-TiAl Base Intermetallics.
skos:notation
RIV/68081723:_____/01:07013156!RIV/2003/AV0/A07003/N
n3:strany
820;826
n3:aktivita
n6:Z n6:P
n3:aktivity
P(IBS2041001), P(OC 522.100), Z(AV0Z2041904)
n3:cisloPeriodika
N/A
n3:dodaniDat
n12:2003
n3:domaciTvurceVysledku
n4:5221110 n4:5076633 n4:3249514
n3:druhVysledku
n18:J
n3:duvernostUdaju
n8:S
n3:entitaPredkladatele
n13:predkladatel
n3:idSjednocenehoVysledku
677915
n3:idVysledku
RIV/68081723:_____/01:07013156
n3:jazykVysledku
n15:eng
n3:klicovaSlova
intermetallics; .gamma.-TiAl; creep
n3:klicoveSlovo
n5:creep n5:intermetallics n5:.gamma.-TiAl
n3:kodStatuVydavatele
NL - Nizozemsko
n3:kontrolniKodProRIV
[121FC9F3C2E2]
n3:nazevZdroje
Materials Science and Engineering. A
n3:obor
n14:JG
n3:pocetDomacichTvurcuVysledku
3
n3:pocetTvurcuVysledku
3
n3:pocetUcastnikuAkce
0
n3:pocetZahranicnichUcastnikuAkce
0
n3:projekt
n10:OC%20522.100 n10:IBS2041001
n3:rokUplatneniVysledku
n12:2001
n3:svazekPeriodika
319-321
n3:tvurceVysledku
Březina, Josef Kuchařová, Květa Dlouhý, Antonín
n3:zamer
n17:AV0Z2041904
s:issn
0921-5093
s:numberOfPages
7