Počet záznamů: 1

Dependence of small-angle neutron scattering contrast on the difference in thermal expansions of phases in two-phase alloys

  1. 1.
    0333204 - UJF-V 2010 RIV GB eng J - Článek v odborném periodiku
    Strunz, Pavel - Gilles, R. - Mukherji, D. - Hofmann, M. - Del Genovese, D. - Roesler, J. - Hoelzel, M. - Davydov, Vadim
    Dependence of small-angle neutron scattering contrast on the difference in thermal expansions of phases in two-phase alloys.
    Journal of Applied Crystallography. Roč. 42, č. 6 (2009), s. 981-989 ISSN 0021-8898
    Výzkumný záměr: CEZ:AV0Z10480505
    Klíčová slova: BASE SUPERALLOY SC16 * SANS
    Kód oboru RIV: BG - Jaderná, atomová a mol. fyzika, urychlovače
    Impakt faktor: 3.018, rok: 2009

    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..
    Trvalý link: http://hdl.handle.net/11104/0005561