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Long-term creep and creep rupture characteristics of TiAl-base intermetallics
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SYSNO ASEP 0324793 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Ostatní články Title Long-term creep and creep rupture characteristics of TiAl-base intermetallics Title Charakteristiky nízkonapěťového creepu a lomu při creepu pro slitiny na bázi intermetalika gama TiAl Author(s) Dlouhý, Antonín (UFM-A) RID, ORCID
Kuchařová, Květa (UFM-A) RID, ORCID
Orlová, Alena (UFM-A)Source Title Materials Science and Engineering A Structural Materials Properties Microstructure and Processing. - : Elsevier - ISSN 0921-5093
510–511, - (2009), s. 350-355Number of pages 6 s. Action Creep 2008 Event date 04.05.2008-09.05.2008 VEvent location Bayreuth Country DE - Germany Event type WRD Language eng - English Country NL - Netherlands Keywords TiAl-base intermetallics ; Creep ; Monkman–Grant relationship Subject RIV JG - Metallurgy R&D Projects GA106/07/0762 GA ČR - Czech Science Foundation (CSF) CEZ AV0Z20410507 - UFM-A (2005-2011) Annotation 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 7×10−10 s−1. 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. Workplace Institute of Physics of Materials Contact Yvonna Šrámková, sramkova@ipm.cz, Tel.: 532 290 485 Year of Publishing 2009
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