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An internal friction study of vacancies in a quenched AuNi solid solution

✍ Scribed by J.R Gost


Publisher
Elsevier Science
Year
1965
Weight
525 KB
Volume
13
Category
Article
ISSN
0001-6160

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✦ Synopsis


Changes in the vacancy concentration in a quenched

Au-30 at. y0 Ni alloy are followed using isothermal internal friction measurements of the Zener relaxation rate. Analysis of the vacancy annealing yields a value of approximately 21 koal/mole for the energy for vacancy motion. From this energy of motion, typical rates of shifting of the Zener peak temperature are obtained. This peak shift is used to interpret a previously unexplained internal friction peak observed in this alloy. UTILISATION DU FROTTEMENT INTERIEUR POUR L'ETUDE DES LACUNES DANS UNE SOLUTION SOLIDE Au-Ni A L'ETAT TREMPE L'auteur a Btudie les changements de la concentration en lacunes dans un alliage Au-30% at. Ni St l'etat trempe, en utilisant des mesures de frottement interieur en condition isotherme, en relaxation de Zener. L'analyse de la disparition des lacunes par l'action de la temperature conduit L une valeur d'environ 21 kcal/mole pour l'energie de deplacement des lacunes. A partir de cette Bnergie de deplacement, on peut obtenir des valeurs typiques du d&placement de la temperature du pit de Zener. Co deplacement du pit est utilise pour interpreter un pit de frottement interieur observe anterieurement clans cet alliage et encore inexpliqui: jusqu'a present. UNTERSUCHUNG VON LEERSTELLEN IN EINEM ABGESCHRECKTEN Au-Ni-MISCHKRISTALL MIT HILFE VON MESSUNGEN DER INNEREN REIBUNG Anderungen der Leerstellenkonzentration in einer Au-30 At. % Ni-Legierung werden dadurch verfolgt, da6 mittels isothermer Messungen der inneren Reibung die Zener-Relaxationsrate bestimmt wird. Eine Analyse des Ausheilverhaltens der Leerstellen liefert fur die Wanderungsenergie der Leerstellen einen Wert van, ungefahr 21 kcal/mol. Aus dieser Wanderungsenergie erhalt man typische Werte fur die zeitliche Anderung der Verschiebung der Temperatur des Zener-Maximums. Diese Maximumsverschiebung wird dazu bentitzt, ein bisher ungekliirtes Maximum der inneren Reibung, das in dieser Legierung beobachtet wurde, zu deuten.


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