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Influence of fiber alignment on creep in directionally solidified NiAl-10Mo in-situ composites
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SYSNO ASEP 0398850 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Influence of fiber alignment on creep in directionally solidified NiAl-10Mo in-situ composites Author(s) Seemuller, C. (DE)
Heilmaier, M. (DE)
Haenschke, T. (GB)
Bei, H. (US)
Dlouhý, Antonín (UFM-A) RID, ORCID
George, E.P. (US)Number of authors 6 Source Title Intermetallics. - : Elsevier - ISSN 0966-9795
Roč. 35, APR (2013), s. 110-115Number of pages 6 s. Language eng - English Country GB - United Kingdom Keywords nickel aluminides ; based on NiAl ; creep (properties and mechanisms) ; crystal growth ; mechanical properties Subject RIV BM - Solid Matter Physics ; Magnetism R&D Projects GA202/09/2073 GA ČR - Czech Science Foundation (CSF) Institutional support UFM-A - RVO:68081723 UT WOS 000315367300016 DOI 10.1016/j.intermet.2012.12.007 Annotation A NiAl-Mo eutectic having a nominal composition of Ni-45Al-10Mo was directionally solidified in a floating-zone furnace at two different growth rates, 20 and 80 mm/h. At the slower growth rate, the Mo fibers in the composite are well-aligned with the growth direction, whereas at the higher growth rate cellular microstructures are observed. Creep testing at 900 degrees C showed that the minimum creep rate is much higher for cellular than for well-aligned structures. In the cellular case a "soft" cell boundary consisting primarily of binary NiAl surrounding "hard" eutectic cell interiors seems to facilitate cell boundary sliding and therefore results in low creep strength. A microstructure-based composite model is used to explain the effects of fiber alignment on creep resistance. Workplace Institute of Physics of Materials Contact Yvonna Šrámková, sramkova@ipm.cz, Tel.: 532 290 485 Year of Publishing 2014
Number of the records: 1