Recovery of work-hardening and low temperature creep in dispersion strengthened Cu alloys with rod shaped particles
✍ Scribed by Michio Okabe; T. Mori
- Publisher
- Elsevier Science
- Year
- 1979
- Weight
- 856 KB
- Volume
- 27
- Category
- Article
- ISSN
- 0001-6160
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✦ Synopsis
Low temperature recovery of work-hardenmg and creep tn a copper single crystal, dispersion strengthened with rod shaped oxide particles. have been studied. The climb rate of an Orowan loop surroundmg a rod shaped particle has been analysed on the basis of dislocation pipe diffusion. This analysis satisfactorily explams the observed shape and size dependences of softening; the softening rate is inversely proportional to the square of the rod radius times the square of the rod length. The stattonary creep rate linearly depends on the applted stress, the proportional constant having the shape and size dependences similar to that of the softening rate. It can be explained by the balance of the annihilation and accumulation of the Orowan loops. R&m&--Now avons ktudi6 le revenu g basse temperature aprks icrouissage et fluage d'un monocristal de ctnvre dont on avait augment6 la r&stance mecanique par des particules d'oxyde en forme de baguettes. Nous avons analye la vitesse de montee d'une boucle d'Orowan entourant une telle particule B partir de la diffusion le long de la dislocation. Cette analyse exphque de manite satisfaisante les variations observkes de I'adoucissement en fonction de la forme et de la taille des particules; la vitesse d'adoucissement est inversement proportionnelle au produit du carrh du rayon des baguettes par le