Effect of structure on the high-temperature ductility of sintered nickel

1.	A temperature of 1250°C and a deformation rate of 6. 10–5 sec–1 constitute conditions under which superductility manifests itself in sintered nickel containing dispersed ZrO2 inclusions. The factor m characterizing the sensitivity of yield stress to deformation rate then assumes the value 0.34.
2.	Thermomechanical treatment of sintered carbonyl nickel and extruded dispersion-hardened nickel leads to loss of the superplastic deformability exhibited under certain conditions by the same materials in the undeformed sintered condition.