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Statements

Subject Item
n2:RIV%2F61389005%3A_____%2F13%3A00391541%21RIV14-AV0-61389005
rdf:type
n18:Vysledek skos:Concept
rdfs:seeAlso
http://link.springer.com/content/pdf/10.1007%2Fs11661-012-1363-6
dcterms:description
Co-Re alloy development is prompted by the search for new materials for future gas turbines which can be used at temperatures considerably higher than the current day single crystal Ni-based superalloys. The Co-Re-based alloys have been designed to have very high melting range, and they are meant for application at + 373 K (+100 degrees C) above Ni-superalloys. They are significantly different from the conventional Co-based alloys that are used in static components of today's gas turbines, and the Co-Re alloys have never been used for structural applications before. The Co-Re-Cr system has complex microstructure with many different phases present. Phase transformations and stabilities of fine strengthening precipitates at high temperatures remain mostly unexplored in the Co-Re alloys, and to develop basic understanding, model ternary and quaternary compositions were studied within the alloy development program. In situ neutron and synchrotron measurements at high temperatures were extensively used for this purpose, and some recent results from the in situ measurements are presented. In particular, the effect of boron doping in Co-Re alloys and the stabilities of the fine TaC precipitates at high temperatures were investigated. A fine dispersion of TaC precipitates strengthens some Co-Re alloys, and their stabilities at the application temperatures are critical. In the beginning, the alloy development strategy is very briefly discussed. Co-Re alloy development is prompted by the search for new materials for future gas turbines which can be used at temperatures considerably higher than the current day single crystal Ni-based superalloys. The Co-Re-based alloys have been designed to have very high melting range, and they are meant for application at + 373 K (+100 degrees C) above Ni-superalloys. They are significantly different from the conventional Co-based alloys that are used in static components of today's gas turbines, and the Co-Re alloys have never been used for structural applications before. The Co-Re-Cr system has complex microstructure with many different phases present. Phase transformations and stabilities of fine strengthening precipitates at high temperatures remain mostly unexplored in the Co-Re alloys, and to develop basic understanding, model ternary and quaternary compositions were studied within the alloy development program. In situ neutron and synchrotron measurements at high temperatures were extensively used for this purpose, and some recent results from the in situ measurements are presented. In particular, the effect of boron doping in Co-Re alloys and the stabilities of the fine TaC precipitates at high temperatures were investigated. A fine dispersion of TaC precipitates strengthens some Co-Re alloys, and their stabilities at the application temperatures are critical. In the beginning, the alloy development strategy is very briefly discussed.
dcterms:title
Application of In Situ Neutron and X-Ray Measurements at High Temperatures in the Development of Co-Re-Based Alloys for Gas Turbines Application of In Situ Neutron and X-Ray Measurements at High Temperatures in the Development of Co-Re-Based Alloys for Gas Turbines
skos:prefLabel
Application of In Situ Neutron and X-Ray Measurements at High Temperatures in the Development of Co-Re-Based Alloys for Gas Turbines Application of In Situ Neutron and X-Ray Measurements at High Temperatures in the Development of Co-Re-Based Alloys for Gas Turbines
skos:notation
RIV/61389005:_____/13:00391541!RIV14-AV0-61389005
n18:predkladatel
n19:ico%3A61389005
n3:aktivita
n15:I
n3:aktivity
I
n3:cisloPeriodika
1
n3:dodaniDat
n9:2014
n3:domaciTvurceVysledku
n8:2458985 n8:8193304
n3:druhVysledku
n16:J
n3:duvernostUdaju
n13:S
n3:entitaPredkladatele
n7:predkladatel
n3:idSjednocenehoVysledku
61755
n3:idVysledku
RIV/61389005:_____/13:00391541
n3:jazykVysledku
n4:eng
n3:klicovaSlova
Co base alloy; neutron diffraction; X-Ray diffraction
n3:klicoveSlovo
n11:X-Ray%20diffraction n11:neutron%20diffraction n11:Co%20base%20alloy
n3:kodStatuVydavatele
US - Spojené státy americké
n3:kontrolniKodProRIV
[A3F8B5FA3C26]
n3:nazevZdroje
Metallurgical and Materials Transactions A
n3:obor
n17:BM
n3:pocetDomacichTvurcuVysledku
2
n3:pocetTvurcuVysledku
11
n3:rokUplatneniVysledku
n9:2013
n3:svazekPeriodika
44A
n3:tvurceVysledku
Wehrs, J. Macsik, Z. Szentmiklosi, L. Strunz, Pavel Gilles, R. Rösler, J. Beran, Přemysl Holzel, M. Hofmann, M. Mukherji, D. Eckerlebe, H.
n3:wos
000313718500006
s:issn
1073-5623
s:numberOfPages
9
n10:doi
10.1007/s11661-012-1363-6