Vacancy properties were studied in an a-Au-30 at.% Ni solid solution, with use of electrical resistivity and mechanical after-effect measurements, for the monitoring of short-range and stress-induced ordering kinetics, respectively. Both thermodynamic& equilibrium concentrations and quenched-in supe
An internal friction study of vacancies in a quenched AuNi 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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