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- W2144016763 abstract "Des experiences de relaxations de contrainte et de sauts de vitesse, effectues a des temperatures inferieures a celles d'apparition du phenomene Portevin-Le Chǎtelier permettent de mettre en evidence du vieillissement dynamique dans l'alliage FeCo-2% V, quel que soit le degre d'ordre. l'analyse des resultats obtenus sur l'alliage ordonne (S ≈ 0,92) montre que, parmiles differentes theories, seule celle de van den Beukel rend correctement compte de nos observations; l'energie d'activation obtenue (E ≈ 1,6 eV) permet d'attribuer le vieillissement a un phenomene lacunaire. l'analyse est beaucoup plus delicate sur l'alliage desordonne (S ≈ 0) ou deux effets se superposent: restauration dynamique et vieillissement dynamique.Stress relaxations and changes of strain rate measurements are made at temperatures below the appearance of the Portevin-Le Chǎtelier effect on ordered and disordered FeCo-2% V alloys. These experiments show the existence of dynamic aging. On the ordered samples (S ≈ 0.92) the van den Beukel theory is the only one, among different theories of dynamic aging, that agrees with our results; the activation energy (E ≈ 1.6 eV) shows that the effect is linked with a vacancy mechanism. On disordered samples (S ≈ 0) the analysis of the results is difficult because of two effects, namely dynamic recovery and dynamic aging, which are present in this case." @default.
- W2144016763 created "2016-06-24" @default.
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- W2144016763 date "1979-10-16" @default.
- W2144016763 modified "2023-09-26" @default.
- W2144016763 title "Vieillissement dynamique dans l'alliage FeCo-2% V" @default.
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- W2144016763 doi "https://doi.org/10.1002/pssa.2210550232" @default.
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