High-temperature internal friction in polycrystalline Zircaloy-4

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 g...

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Autores principales: Povolo, F., Molinas, B.J.
Formato: JOUR
Materias:
METALS TESTING - High Temperature
RELAXATION PROCESSES
ZIRCONIUM METALLOGRAPHY - Grain Growth
ACTIVATION ENTHALPY
GRAIN-BOUNDARY SLIDING
HIGH-TEMPERATURE INTERNAL FRICTION
PARTICLE-FREE GRAIN BOUNDARIES
ZIRCALOY-4
ZIRCONIUM AND ALLOYS
Acceso en línea:http://hdl.handle.net/20.500.12110/paper_00222461_v21_n10_p3539_Povolo
Aporte de:
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
id todo:paper_00222461_v21_n10_p3539_Povolo
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spelling todo:paper_00222461_v21_n10_p3539_Povolo2023-10-03T14:28:54Z High-temperature internal friction in polycrystalline Zircaloy-4 Povolo, F. Molinas, B.J. METALS TESTING - High Temperature RELAXATION PROCESSES ZIRCONIUM METALLOGRAPHY - Grain Growth ACTIVATION ENTHALPY GRAIN-BOUNDARY SLIDING HIGH-TEMPERATURE INTERNAL FRICTION PARTICLE-FREE GRAIN BOUNDARIES ZIRCALOY-4 ZIRCONIUM AND ALLOYS 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. © 1986 Chapman and Hall Ltd. Fil:Povolo, F. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. JOUR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_00222461_v21_n10_p3539_Povolo
institution Universidad de Buenos Aires
institution_str I-28
repository_str R-134
collection Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic METALS TESTING - High Temperature
RELAXATION PROCESSES
ZIRCONIUM METALLOGRAPHY - Grain Growth
ACTIVATION ENTHALPY
GRAIN-BOUNDARY SLIDING
HIGH-TEMPERATURE INTERNAL FRICTION
PARTICLE-FREE GRAIN BOUNDARIES
ZIRCALOY-4
ZIRCONIUM AND ALLOYS
spellingShingle METALS TESTING - High Temperature
RELAXATION PROCESSES
ZIRCONIUM METALLOGRAPHY - Grain Growth
ACTIVATION ENTHALPY
GRAIN-BOUNDARY SLIDING
HIGH-TEMPERATURE INTERNAL FRICTION
PARTICLE-FREE GRAIN BOUNDARIES
ZIRCALOY-4
ZIRCONIUM AND ALLOYS
Povolo, F.
Molinas, B.J.
High-temperature internal friction in polycrystalline Zircaloy-4
topic_facet METALS TESTING - High Temperature
RELAXATION PROCESSES
ZIRCONIUM METALLOGRAPHY - Grain Growth
ACTIVATION ENTHALPY
GRAIN-BOUNDARY SLIDING
HIGH-TEMPERATURE INTERNAL FRICTION
PARTICLE-FREE GRAIN BOUNDARIES
ZIRCALOY-4
ZIRCONIUM AND ALLOYS
description 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. © 1986 Chapman and Hall Ltd.
format JOUR
author Povolo, F.
Molinas, B.J.
author_facet Povolo, F.
Molinas, B.J.
author_sort Povolo, F.
title High-temperature internal friction in polycrystalline Zircaloy-4
title_short High-temperature internal friction in polycrystalline Zircaloy-4
title_full High-temperature internal friction in polycrystalline Zircaloy-4
title_fullStr High-temperature internal friction in polycrystalline Zircaloy-4
title_full_unstemmed High-temperature internal friction in polycrystalline Zircaloy-4
title_sort high-temperature internal friction in polycrystalline zircaloy-4
url http://hdl.handle.net/20.500.12110/paper_00222461_v21_n10_p3539_Povolo
work_keys_str_mv AT povolof hightemperatureinternalfrictioninpolycrystallinezircaloy4
AT molinasbj hightemperatureinternalfrictioninpolycrystallinezircaloy4
_version_ 1807315323399962624

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