Abstract
Dispersion strengthened nickel-base superalloy bar has been produced by hot extrusion of mechanically alloyed powders. The fabrication methods produce an ultra-fine grained material which resists grain growth up to a critical temperature around 1506K (2250°F). Above this temperature, a discontinuous grain growth process leads to the formation of coarse elongated macrograins. The material becomes completely coarse grained in short times. Annealing below this temperature produces only slight grain coarsening, and relieves stored strain energy. Changes in properties are related to the grain growth and strain annealing processes.
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Cairns, R.L. Effect of annealing on structure and properties of a dispersion strengthened superalloy, IN-853. Metall Trans 5, 1677–1684 (1974). https://doi.org/10.1007/BF02646342
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DOI: https://doi.org/10.1007/BF02646342