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Statements

Subject Item
n2:RIV%2F61389005%3A_____%2F02%3A49033122%21RIV%2F2004%2FAV0%2FA49004%2FN
rdf:type
skos:Concept n17:Vysledek
dcterms:description
The SANS experiment was a crucial part of a broader investigation of the long-time structural stability of the polycrystalline Ni-base superalloy and its effect on the subsequent creep characteristics. The results of the creep tests have shown that a long isothermal exposure at temperatures of 430degreesC and 650degreesC up to 25 000 h changed the deformation ability and creep life of the exposed specimens. While structure analyses (TEM) showed no evidence of a morphological and/or dimensional gamma' change, the SANS technique was able to reveal significant changes of the morphology of gamma' precipitates already after the shortest applied thermal exposition, 2000 h. The resulting size distributions, distance distributions, mean sizes and mean distances between the precipitates made evident that both the size and the distance increase in the bulk of the alloy with increasing thermal exposure even at such relatively low temperatures. The SANS experiment was a crucial part of a broader investigation of the long-time structural stability of the polycrystalline Ni-base superalloy and its effect on the subsequent creep characteristics. The results of the creep tests have shown that a long isothermal exposure at temperatures of 430degreesC and 650degreesC up to 25 000 h changed the deformation ability and creep life of the exposed specimens. While structure analyses (TEM) showed no evidence of a morphological and/or dimensional gamma' change, the SANS technique was able to reveal significant changes of the morphology of gamma' precipitates already after the shortest applied thermal exposition, 2000 h. The resulting size distributions, distance distributions, mean sizes and mean distances between the precipitates made evident that both the size and the distance increase in the bulk of the alloy with increasing thermal exposure even at such relatively low temperatures.
dcterms:title
Microstructural changes in long-time thermally exposed Ni-base superalloy studied by SANS. Microstructural changes in long-time thermally exposed Ni-base superalloy studied by SANS.
skos:prefLabel
Microstructural changes in long-time thermally exposed Ni-base superalloy studied by SANS. Microstructural changes in long-time thermally exposed Ni-base superalloy studied by SANS.
skos:notation
RIV/61389005:_____/02:49033122!RIV/2004/AV0/A49004/N
n3:strany
S1155;S1157
n3:aktivita
n14:Z
n3:aktivity
Z(AV0Z1048901)
n3:cisloPeriodika
2
n3:dodaniDat
n4:2004
n3:domaciTvurceVysledku
n13:2458985
n3:druhVysledku
n16:J
n3:duvernostUdaju
n15:S
n3:entitaPredkladatele
n8:predkladatel
n3:idSjednocenehoVysledku
653397
n3:idVysledku
RIV/61389005:_____/02:49033122
n3:jazykVysledku
n10:eng
n3:klicovaSlova
SANS; superalloy
n3:klicoveSlovo
n6:superalloy n6:SANS
n3:kodStatuVydavatele
US - Spojené státy americké
n3:kontrolniKodProRIV
[82D99333CE0B]
n3:nazevZdroje
APPLIED PHYSICS. A-MATERIALS SCIENCE & PROCESSING
n3:obor
n12:BM
n3:pocetDomacichTvurcuVysledku
1
n3:pocetTvurcuVysledku
5
n3:pocetUcastnikuAkce
0
n3:pocetZahranicnichUcastnikuAkce
0
n3:rokUplatneniVysledku
n4:2002
n3:svazekPeriodika
74
n3:tvurceVysledku
Vrchovinksy, V. Strunz, Pavel Horňák, P. Zrník, J. Wiedenmann, A.
n3:zamer
n9:AV0Z1048901
s:issn
0947-8396
s:numberOfPages
3