caa a22 4500 467946175 CHVBK 20180322200725.0 cr unu---uuuuu 170328e19861001xx s 000 0 eng 10.1007/BF00553798 doi (NATIONALLICENCE)springer-10.1007/BF00553798 (NATIONALLICENCE)springer-10.1007/BF02403000 High-temperature internal friction in polycrystalline Zircaloy-4 [Elektronische Daten] [F. Povolo, B. Molinas] The high-temperature internal friction spectrum of polycrystalline Zircaloy-4 is investigated in detail, for a wide range of frequencies. Two internal friction maxima are observed. The lower-temperature peak is interpreted in terms of a relaxation mechanism produced by the sliding of particle-free grain boundaries. The higher-temperature peak is attributed to the sliding of boundaries blocked by small precipitates. Values for the activation enthalpy and the preexponential factor for diffusion along grain boundaries are given, and the viscosity coefficient associated with grain-boundary sliding is determined as a function of temperature. Chapman and Hall Ltd, 1986 Povolo F. Departamento de Materiales, Comisión Nacional de Energia Atómica, Av. del Libertador 8250, 1429, Buenos Aires aut Molinas B. Departamento de Fisica, Universidad Nacional de Rosario, Instituto de Fisica Rosario, Av. Pellegrini 250, 2000, Rosario, Argentina aut Journal of Materials Science Kluwer Academic Publishers 21/10(1986-10-01), 3539-3547 0022-2461 21:10<3539 1986 21 10853 https://doi.org/10.1007/BF00553798 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/BF00553798 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Povolo F. Departamento de Materiales, Comisión Nacional de Energia Atómica, Av. del Libertador 8250, 1429, Buenos Aires aut NATIONALLICENCE 700 1- Molinas B. Departamento de Fisica, Universidad Nacional de Rosario, Instituto de Fisica Rosario, Av. Pellegrini 250, 2000, Rosario, Argentina aut NATIONALLICENCE 773 0- Journal of Materials Science Kluwer Academic Publishers 21/10(1986-10-01), 3539-3547 0022-2461 21:10<3539 1986 21 10853 NATIONALLICENCE 856 40 https://doi.org/10.1007/BF02403000 text/html Onlinezugriff via DOI Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer NATIONALLICENCE NATIONALLICENCE NL-springer