Published 1975
| Version v1
Journal article
Theoretical and experimental study of the internal friction peaks associated with grain boundaries in metals
- 1. Ecole Nationale Superieure de Mecanique et d'Aerotechnique (ENSMA), 86 - Poitiers (France)
Description
Experimental studies on metals show the existence of several internal friction peaks associated with grain boundary relaxation, with activation energies between 0.4 and 3Hsub(v). A satisfactory quantitative mechanism of the phenomenon has not yet emerged. Experimental results on different metals of F.C.C. lattices (Ag, Cu, Al, Ni, Pb), and on zirconium, show the influence of the recrystallisation state and the simultaneous contribution of the crystal and boundaries defects. Diffusion-controlled glide and climb mechanisms induced by cyclic sollicitation seem in accordance with experimental data on the internal friction peaks with an activation energy in the range 0.4-1.2Hsub(v)
Abstract (French)
Les etudes faites sur les effets de frottement interieur associes aux joints de grains dans les metaux mettent en evidence plusieurs pics de relaxation d'energies d'activation comprises entre 0,4 et 3Hsub(v). Aucun mecanisme n'a pu etre jusqu'ici retenu avec certitude pour rendre compte des effets observes. Des resultats obtenus sur differents metaux de structure C.F.C. (Ag, Cu, Al, Ni, Pb) et sur le zirconium montrent l'influence importante de l'etat de recristallisation et la contribution simultanee des defauts de reseau et de joints. Un mecanisme de glissement et montee induite par la sollicitation parait coherent avec l'ensemble des observations experimentales pour les pics d'energie d'activation comprise entre 0,4 et 1,2Hsub(v)Additional details
Additional titles
- Original title (French)
- Aspects theoriques et experimentaux des effets de frottement interieur associes aux joints de grains dans les metaux
Publishing Information
- Journal Title
- J. Phys. (Paris), Colloq.
- Journal Issue
- no.4
- Series
- J. Phys. (Paris), Colloq.
Conference
- Title
- International colloquium on grain boundaries in metals.
- Dates
- 16 Jun 1975.
- Place
- Saint-Etienne, France.
INIS
- Country of Publication
- France
- Country of Input or Organization
- France
- INIS RN
- 7251051
- Subject category
- S36: MATERIALS SCIENCE;
- Resource subtype / Literary indicator
- Conference
- Descriptors DEI
- ACTIVATION ENERGY; DISLOCATIONS; FCC LATTICES; GRAIN BOUNDARIES; INTERNAL FRICTION; RECRYSTALLIZATION; RELAXATION; SLIP; ZIRCONIUM
- Descriptors DEC
- CRYSTAL DEFECTS; CRYSTAL LATTICES; CRYSTAL STRUCTURE; CUBIC LATTICES; ELEMENTS; ENERGY; FRICTION; LINE DEFECTS; METALS; MICROSTRUCTURE; TRANSITION ELEMENTS