Conclusions
When alloy KhN77TYu is subjected to preliminary creep dispersed particles of γ′ phase appear in the structure, and consequently plastic deformation occurs by cutting of the particles by dislocations, with formation of stable stacking faults, which are retained during subsequent aging and strengthen the structure. After long-term strength tests the structure contains dislocation loops evenly distributed through the grains, with no coplanar distribution of dislocations in grain boundaries. All these changes in the fine structure lead to an increase of the service life of alloy KhN77TYu.
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Additional information
Translated from Metallovedenie i Termicheskaya Obrabotka Metallov, No. 11, pp. 68–69, November, 1974.
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Klypin, A.A., Sorokina, L.P. Effect of prolonged loading on the structure and properties of alloy KhN77TYu. Met Sci Heat Treat 16, 979–981 (1974). https://doi.org/10.1007/BF00663814
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DOI: https://doi.org/10.1007/BF00663814