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Dependence of small-angle neutron scattering contrast on the difference in thermal expansions of phases in two-phase alloys
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SYSNO ASEP 0333204 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Dependence of small-angle neutron scattering contrast on the difference in thermal expansions of phases in two-phase alloys Author(s) Strunz, Pavel (UJF-V) RID, ORCID, SAI
Gilles, R. (DE)
Mukherji, D. (DE)
Hofmann, M. (DE)
Del Genovese, D. (DE)
Roesler, J. (DE)
Hoelzel, M. (DE)
Davydov, Vadim (UJF-V)Source Title Journal of Applied Crystallography. - : Wiley - ISSN 0021-8898
Roč. 42, č. 6 (2009), s. 981-989Number of pages 9 s. Language eng - English Country GB - United Kingdom Keywords BASE SUPERALLOY SC16 ; SANS Subject RIV BG - Nuclear, Atomic and Molecular Physics, Colliders CEZ AV0Z10480505 - UJF-V (2005-2011) UT WOS 000271895700001 DOI 10.1107/S0021889809035353 Annotation Theoretical expressions describing small-angle neutron scattering (SANS) contrast dependence on temperature in the region where no phase-composition changes occur were derived for two-phase Ni superalloys. The theory is based on the difference in thermal expansion of the two primary phases, gamma and gamma'. The simulations show that the scattering contrast temperature evolution is significant enough to be considered in in situ SANS experiments with superalloys at elevated temperatures. The simulations performed show that the magnitude of the scattering contrast at room temperature is firmly connected with the particular shape of the scattering contrast temperature dependence. This fact can be used for determination of the scattering contrast without a knowledge of the compositions of the individual phases. The theoretical expressions derived for scattering contrast were proven experimentally on an Ni-Fe-base alloy, DT706.. Workplace Nuclear Physics Institute Contact Markéta Sommerová, sommerova@ujf.cas.cz, Tel.: 266 173 228 Year of Publishing 2010
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