Abstract
The airfoil alloy IN 939 has been evaluated for the use in large aircraft engine structures. Castability trials, including sprayforming, structural welding, with electron beam (EB) and with laser, as well as repair with TIG-welding have been performed. Brazing has also been evaluated while different heat treatment schedules for pre- and post-welding and for the solution and age cycle were reviewed. Mechanical property data, tensile, creep, LCF, FCG, were established for several temperatures on material excised from large castings and on weldments. The performance of the sprayformed (SF) material was superior to the conventionally cast (CC) material but notch-sensitivity was noticed in creep testing.
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Sjöberg, G., Imamovic, D., Gabel, J., Caballero, O., Brooks, J. W., Ferté, J. P., & Lugan, A. (2004). Evaluation of the IN 939 alloy for large aircraft engine structures. In Proceedings of the International Symposium on Superalloys (pp. 441–450). Minerals, Metals and Materials Society. https://doi.org/10.7449/2004/superalloys_2004_441_450
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