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Statements

Subject Item
n2:RIV%2F61389005%3A_____%2F12%3A00384686%21RIV13-AV0-61389005
rdf:type
n3:Vysledek skos:Concept
dcterms:description
Co-Re-based alloys have been developed to supplement the Ni-base superalloys used in gas turbine applications at high temperatures (1473 K [1200 A degrees C] bare metal temperature). Unlike other commercial Co-based alloys, the Co matrix in the Co-Re alloys has a stable hexagonal close-packed (hcp) structure at room temperature. In situ neutron diffraction measurements on experimental Co-Re alloys hardened by carbide precipitates showed that the matrix undergoes an hcp a double dagger dagger face-centered cubic (fcc) allotropic transformation after heating to high temperatures. Furthermore, it was found that this transformation has a large hysteresis (similar to 100 K). Thermodynamic calculations were undertaken to study the high-temperature phase stability and transformations in the complex multicomponent, multiphase Co-Re-Cr-C system with or without the addition of Ta. The results show that the minor phases (Cr23C6-type carbides and the Cr2Re3-type sigma phase) play an important role in the hcp a double dagger dagger fcc hysteresis by influencing the partitioning of Cr and Re between the matrix and the other phases. Co-Re-based alloys have been developed to supplement the Ni-base superalloys used in gas turbine applications at high temperatures (1473 K [1200 A degrees C] bare metal temperature). Unlike other commercial Co-based alloys, the Co matrix in the Co-Re alloys has a stable hexagonal close-packed (hcp) structure at room temperature. In situ neutron diffraction measurements on experimental Co-Re alloys hardened by carbide precipitates showed that the matrix undergoes an hcp a double dagger dagger face-centered cubic (fcc) allotropic transformation after heating to high temperatures. Furthermore, it was found that this transformation has a large hysteresis (similar to 100 K). Thermodynamic calculations were undertaken to study the high-temperature phase stability and transformations in the complex multicomponent, multiphase Co-Re-Cr-C system with or without the addition of Ta. The results show that the minor phases (Cr23C6-type carbides and the Cr2Re3-type sigma phase) play an important role in the hcp a double dagger dagger fcc hysteresis by influencing the partitioning of Cr and Re between the matrix and the other phases.
dcterms:title
The Hexagonal Close-Packed (HCP) a double dagger dagger Face-Centered Cubic (FCC) Transition in Co-Re-Based Experimental Alloys Investigated by Neutron Scattering The Hexagonal Close-Packed (HCP) a double dagger dagger Face-Centered Cubic (FCC) Transition in Co-Re-Based Experimental Alloys Investigated by Neutron Scattering
skos:prefLabel
The Hexagonal Close-Packed (HCP) a double dagger dagger Face-Centered Cubic (FCC) Transition in Co-Re-Based Experimental Alloys Investigated by Neutron Scattering The Hexagonal Close-Packed (HCP) a double dagger dagger Face-Centered Cubic (FCC) Transition in Co-Re-Based Experimental Alloys Investigated by Neutron Scattering
skos:notation
RIV/61389005:_____/12:00384686!RIV13-AV0-61389005
n3:predkladatel
n18:ico%3A61389005
n4:aktivita
n11:Z n11:P
n4:aktivity
P(FR-TI1/378), Z(AV0Z10480505)
n4:cisloPeriodika
6
n4:dodaniDat
n7:2013
n4:domaciTvurceVysledku
n5:2458985
n4:druhVysledku
n17:J
n4:duvernostUdaju
n10:S
n4:entitaPredkladatele
n14:predkladatel
n4:idSjednocenehoVysledku
138889
n4:idVysledku
RIV/61389005:_____/12:00384686
n4:jazykVysledku
n19:eng
n4:klicovaSlova
Co-base alloy; neutron diffraction; electron microscopy
n4:klicoveSlovo
n9:neutron%20diffraction n9:Co-base%20alloy n9:electron%20microscopy
n4:kodStatuVydavatele
US - Spojené státy americké
n4:kontrolniKodProRIV
[1FAA48AB2651]
n4:nazevZdroje
Metallurgical and Materials Transactions A
n4:obor
n13:BM
n4:pocetDomacichTvurcuVysledku
1
n4:pocetTvurcuVysledku
7
n4:projekt
n8:FR-TI1%2F378
n4:rokUplatneniVysledku
n7:2012
n4:svazekPeriodika
43A
n4:tvurceVysledku
Strunz, Pavel Piegert, S. Gilles, R. Holzel, M. Mukherji, D. Rösler, J. Hofmann, M.
n4:wos
000303457000012
n4:zamer
n12:AV0Z10480505
s:issn
1073-5623
s:numberOfPages
11
n20:doi
10.1007/s11661-011-1058-4