4. Special case of creep in dispersoid alloys
4.1 Effect of dispersoids on creep strength
Increased creep resistance can be achieved by the presence of a finely dispersed second phase in a matrix: these dispersoids act as obstacles to the propagation of dislocations. The second phase is composed of :
very fine ceramic particles, generally oxides ranging in size from 10 nm to a few hundred nanometres;
metal precipitates.
Creep speed is several orders of magnitude lower than it would be without dispersoids. It depends on the size of the particles and the average distance between them. The smaller the distance between particles, the greater the creep resistance.
Creep mechanisms in nickel-base...
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Special case of creep in dispersoid alloys
Extrapolations and predictions of long-term creep behavior
Bibliography
References
Standardization
French Standards Association (AFNOR)
- Produits en acier. Essai de fluage - NF A03-355 - Déc. 1985
- Forets à centrer pour centres sans chanfrein de protection. Type A. Indice de classement : E66-053. - NF ISO 866 - Janv. 2004
- Forets à centrer pour centres avec chanfrein de protection. Type B Indice de classement E66-054. - NF ISO 2540 - Janv. 2004
- Forets à centrer pour centres à profil curviligne....
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