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  • Je analyzován nízko-rychlostní creep v oboru dob do lomu dosahujících 25 000 h, a to pro tři typy slitin Ti–48Al–2Cr–2Nb–1B, Ti–46Al–7Nb–0.6Cr–0.2Ni–0.1Si a Ti–46Al–2W–0.5Si–0.7B (vše at.%) odvozených od intermetalické sloučeniny gama TiAl. Creepové chování jednotlivých slitin při teplotě 1023K je vyhodnoceno, porovnáno a příčiny rozdílné creepové pevnosti jsou diskutovány. Získané výsledky naznačují, že dislokační creep významně přispívá k celkové deformaci i přesto, že dosažené minimální rychlosti creepu se pohybují v oboru 71010 s1. V práci je rovněž kriticky analyzována použitelnost Monkman-Grantovy relace pro interpretaci a predikci creepového chování. Je dokázáno, že relace podobného typu vycházejí z obecné funkcionální identity, která je platná pro každou spojitou křivku včetně křivek creepových. Je zdůrazněna role tvarového faktoru křivky S. (cs)
  • The present study investigates creep in three TiAl-base intermetallic alloys, Ti–48Al–2Cr–2Nb–1B, Ti–46Al–7Nb–0.6Cr–0.2Ni–0.1Si and Ti–46Al–2W–0.5Si–0.7B (all at.%), in the range of rupture times up to 25 000 h. Creep behaviour of the individual alloys at 1023K is assessed and compared and reasons for creep strength variations are discussed. Results suggest that dislocation processes contribute to the creep strain accumulation even at creep rates as low as 71010 s1. Finally the applicability of Monkman–Grant-type relationships is critically analyzed. It is shown that these relationships stem from a general functional identity that is valid for any continuous creep curve. The role of the creep curve shape factor S is highlighted.
  • The present study investigates creep in three TiAl-base intermetallic alloys, Ti–48Al–2Cr–2Nb–1B, Ti–46Al–7Nb–0.6Cr–0.2Ni–0.1Si and Ti–46Al–2W–0.5Si–0.7B (all at.%), in the range of rupture times up to 25 000 h. Creep behaviour of the individual alloys at 1023K is assessed and compared and reasons for creep strength variations are discussed. Results suggest that dislocation processes contribute to the creep strain accumulation even at creep rates as low as 71010 s1. Finally the applicability of Monkman–Grant-type relationships is critically analyzed. It is shown that these relationships stem from a general functional identity that is valid for any continuous creep curve. The role of the creep curve shape factor S is highlighted. (en)
Title
  • Long-term creep and creep rupture characteristics of TiAl-base intermetallics
  • Long-term creep and creep rupture characteristics of TiAl-base intermetallics (en)
  • Charakteristiky nízkonapěťového creepu a lomu při creepu pro slitiny na bázi intermetalika gama TiAl (cs)
skos:prefLabel
  • Long-term creep and creep rupture characteristics of TiAl-base intermetallics
  • Long-term creep and creep rupture characteristics of TiAl-base intermetallics (en)
  • Charakteristiky nízkonapěťového creepu a lomu při creepu pro slitiny na bázi intermetalika gama TiAl (cs)
skos:notation
  • RIV/68081723:_____/09:00324793!RIV09-AV0-68081723
http://linked.open...avai/riv/aktivita
http://linked.open...avai/riv/aktivity
  • P(GA106/07/0762), Z(AV0Z20410507)
http://linked.open...iv/cisloPeriodika
  • -
http://linked.open...vai/riv/dodaniDat
http://linked.open...aciTvurceVysledku
http://linked.open.../riv/druhVysledku
http://linked.open...iv/duvernostUdaju
http://linked.open...titaPredkladatele
http://linked.open...dnocenehoVysledku
  • 324104
http://linked.open...ai/riv/idVysledku
  • RIV/68081723:_____/09:00324793
http://linked.open...riv/jazykVysledku
http://linked.open.../riv/klicovaSlova
  • TiAl-base intermetallics; Creep; Monkman–Grant relationship (en)
http://linked.open.../riv/klicoveSlovo
http://linked.open...odStatuVydavatele
  • NL - Nizozemsko
http://linked.open...ontrolniKodProRIV
  • [F97E663580E5]
http://linked.open...i/riv/nazevZdroje
  • Materials Science and Engineering A-Structural materials
http://linked.open...in/vavai/riv/obor
http://linked.open...ichTvurcuVysledku
http://linked.open...cetTvurcuVysledku
http://linked.open...vavai/riv/projekt
http://linked.open...UplatneniVysledku
http://linked.open...v/svazekPeriodika
  • 510–511
http://linked.open...iv/tvurceVysledku
  • Dlouhý, Antonín
  • Kuchařová, Květa
  • Orlová, Alena
http://linked.open...n/vavai/riv/zamer
issn
  • 0921-5093
number of pages
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