About: High Temperature Fatigue Behaviour of Third Generation of TiAl Alloys

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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	Low cycle fatigue properties of lamellar TiAl with 7.8 at.% Nb were studied at four temperatures: room temperature, 700, 750 and 800 °C. Up to 750 °C, stable cyclic behaviour is observed while cyclic softening is characteristic for 800°C. The strength of the alloy is still high even at 800 °C. The TEM observation did not reveal any substantial changes in the microstructure due to the cycling at RT. At 750 °C, the lamellar structure was in some places destroyed by cyclic plasticity and pure g-phase islands with high density of dislocation debris were formed. At 800 °C, the domains without lamellar structure cover about 10% of inspected volume and are almost dislocation free. The results show that the diffusion processes leading to vanishing of small prizmatic dislocation loops start to operate between 750 and 800 °C. The destruction of lamellar microstructure and annealing of dislocation debris is the reason for cyclic softening at 800 °C. Low cycle fatigue properties of lamellar TiAl with 7.8 at.% Nb were studied at four temperatures: room temperature, 700, 750 and 800 °C. Up to 750 °C, stable cyclic behaviour is observed while cyclic softening is characteristic for 800°C. The strength of the alloy is still high even at 800 °C. The TEM observation did not reveal any substantial changes in the microstructure due to the cycling at RT. At 750 °C, the lamellar structure was in some places destroyed by cyclic plasticity and pure g-phase islands with high density of dislocation debris were formed. At 800 °C, the domains without lamellar structure cover about 10% of inspected volume and are almost dislocation free. The results show that the diffusion processes leading to vanishing of small prizmatic dislocation loops start to operate between 750 and 800 °C. The destruction of lamellar microstructure and annealing of dislocation debris is the reason for cyclic softening at 800 °C. (en)
Title	High Temperature Fatigue Behaviour of Third Generation of TiAl Alloys High Temperature Fatigue Behaviour of Third Generation of TiAl Alloys (en)
skos:prefLabel	High Temperature Fatigue Behaviour of Third Generation of TiAl Alloys High Temperature Fatigue Behaviour of Third Generation of TiAl Alloys (en)
skos:notation	RIV/68081723:_____/12:00387814!RIV13-GA0-68081723
http://linked.open...avai/riv/aktivita	I P
http://linked.open...avai/riv/aktivity	I, P(ED1.1.00/02.0068), P(GAP107/11/0704)
http://linked.open...vai/riv/dodaniDat	2013
http://linked.open...aciTvurceVysledku	Obrtlík, Karel Kruml, Tomáš
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	138976
http://linked.open...ai/riv/idVysledku	RIV/68081723:_____/12:00387814
http://linked.open...riv/jazykVysledku	eng - angličtina
http://linked.open.../riv/klicovaSlova	TiAl; high temperature fatigue; TEM; lamellar microstructure (en)
http://linked.open.../riv/klicoveSlovo	high temperature fatigue TEM TiAl lamellar microstructure
http://linked.open...ontrolniKodProRIV	[D45762BAA77B]
http://linked.open...v/mistoKonaniAkce	Brno
http://linked.open...i/riv/mistoVydani	Brno
http://linked.open...i/riv/nazevZdroje	Proceedings of the 16th International Colloquium Mechanical Fatigue of Materials
http://linked.open...in/vavai/riv/obor	JL
http://linked.open...ichTvurcuVysledku	2 (xsd:int)
http://linked.open...cetTvurcuVysledku	2 (xsd:int)
http://linked.open...vavai/riv/projekt	Central european institute of technology Optimization of structure and properties of advanced high-temperature cast materials alloyed with carbon by complex heat treatment
http://linked.open...UplatneniVysledku	2012
http://linked.open...iv/tvurceVysledku	Kruml, Tomáš Obrtlík, Karel
http://linked.open...vavai/riv/typAkce	WRD - Světová
http://linked.open.../riv/zahajeniAkce	2012-09-24 (xsd:date)
number of pages	6 (xsd:int)
http://purl.org/ne...btex#hasPublisher	Ústav fyziky materiálů AV ČR
https://schema.org/isbn	978-80-87434-05-5

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