About: Creep in NiAl-Mo Eutectics

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An Entity of Type : http://linked.opendata.cz/ontology/domain/vavai/Vysledek, within Data Space : linked.opendata.cz associated with source document(s)

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rdf:type	skos:Concept http://linked.opendata.cz/ontology/domain/vavai/Vysledek
Description	We report on creep in NiAl-Mo ternary eutectic and NiAl intermetallic, having respective nominal compositions Ni-45.5Al-9Mo and Ni-45.2Al (at.%). These alloys were directionally solidified in a high-temperature optical floating zone furnace. The eutectic alloy exhibited a well-aligned rod-like microstructure, consisting of NiAl matrix and 14% (by volume) continuous Mo-fibres oriented along a [001]-crystal growth direction. Cylindrical [001]-oriented specimens were loaded in compression at temperatures in a range 1073 – 1173 K. Formidable strengthening by regularly distributed fine fibres (typical diameter, 400 nm) was observed which resulted in minimum creep rates of the NiAl-Mo eutectic that were seven orders of magnitude lower than the corresponding minimum creep rates of the NiAl matrix. Preliminary microstructural investigations suggested that the strengthening effect is due to an interaction between Mo fibres and subgrain boundaries that form in the course of creep. This interaction leads to an increase of dislocation density in the vicinity of fibres and to an efficient redistribution of stresses in the microstructure. We report on creep in NiAl-Mo ternary eutectic and NiAl intermetallic, having respective nominal compositions Ni-45.5Al-9Mo and Ni-45.2Al (at.%). These alloys were directionally solidified in a high-temperature optical floating zone furnace. The eutectic alloy exhibited a well-aligned rod-like microstructure, consisting of NiAl matrix and 14% (by volume) continuous Mo-fibres oriented along a [001]-crystal growth direction. Cylindrical [001]-oriented specimens were loaded in compression at temperatures in a range 1073 – 1173 K. Formidable strengthening by regularly distributed fine fibres (typical diameter, 400 nm) was observed which resulted in minimum creep rates of the NiAl-Mo eutectic that were seven orders of magnitude lower than the corresponding minimum creep rates of the NiAl matrix. Preliminary microstructural investigations suggested that the strengthening effect is due to an interaction between Mo fibres and subgrain boundaries that form in the course of creep. This interaction leads to an increase of dislocation density in the vicinity of fibres and to an efficient redistribution of stresses in the microstructure. (en)
Title	Creep in NiAl-Mo Eutectics Creep in NiAl-Mo Eutectics (en)
skos:prefLabel	Creep in NiAl-Mo Eutectics Creep in NiAl-Mo Eutectics (en)
skos:notation	RIV/68081723:_____/11:00376019!RIV12-AV0-68081723
http://linked.open...avai/predkladatel	Ústav fyziky materiálů AVČR, v.v.i.
http://linked.open...avai/riv/aktivita	P Z
http://linked.open...avai/riv/aktivity	P(GA202/09/2073), Z(AV0Z20410507)
http://linked.open...vai/riv/dodaniDat	2012
http://linked.open...aciTvurceVysledku	Dlouhý, Antonín Barták, Tomáš Dudová, Marie Kuchařová, Květa
http://linked.open.../riv/druhVysledku	D - Článek ve sborníku
http://linked.open...iv/duvernostUdaju	S - Úplné a pravdivé údaje nepodléhající ochraně podle zvláštních právních předpisů
http://linked.open...titaPredkladatele	Ústav fyziky materiálů AV ČR, v. v. i.
http://linked.open...dnocenehoVysledku	192237
http://linked.open...ai/riv/idVysledku	RIV/68081723:_____/11:00376019
http://linked.open...riv/jazykVysledku	eng - angličtina
http://linked.open.../riv/klicovaSlova	creep; eutectics; in-situ composites (en)
http://linked.open.../riv/klicoveSlovo	creep eutectics in-situ composites
http://linked.open...ontrolniKodProRIV	[E7094A133F25]
http://linked.open...v/mistoKonaniAkce	Brno
http://linked.open...i/riv/mistoVydani	Ostrava
http://linked.open...i/riv/nazevZdroje	METAL 2011 Conference Proceedings
http://linked.open...in/vavai/riv/obor	JG
http://linked.open...ichTvurcuVysledku	4 (xsd:int)
http://linked.open...cetTvurcuVysledku	4 (xsd:int)
http://linked.open...vavai/riv/projekt	Deformation mechanisms of in-situ composite materials
http://linked.open...UplatneniVysledku	2011
http://linked.open...iv/tvurceVysledku	Barták, Tomáš Dlouhý, Antonín Dudová, Marie Kuchařová, Květa
http://linked.open...vavai/riv/typAkce	WRD - Světová
http://linked.open.../riv/zahajeniAkce	2011-05-18 (xsd:date)
http://linked.open...n/vavai/riv/zamer	Physical properties of advanced materials in relation to their microstructure and processing
number of pages	5 (xsd:int)
http://purl.org/ne...btex#hasPublisher	TANGER, spol. s r.o.
https://schema.org/isbn	978-80-87294-22-2
is http://linked.open...avai/riv/vysledek of	Creep in NiAl-Mo Eutectics Creep in NiAl-Mo Eutectics

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