From a cost point of view SNECMA has found DS columnar grain manufacturing technology to be highly attractive compared to single crystal. CM 186 LC alloy exhibits enhanced mechanical and environmental properties and temperature capability compared to MAR M 200 Hf alloy; these properties are close to first-generation single crystal alloys up to 982°C (1800°F). The alloy is shown to be amenable to various coating and brazing high-temperature processes. The longer term creeprupture/phase stability data base on the alloy has now been extended out to 8300 hours at 1038°C (1900°F). Castings for engine test have been produced using CM 186 LC alloy.
SNECMA Experience With Cost-Effective DS Airfoil Technology Applied Using CM 186 LC® Alloy
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Caruel, F., Bourguignon, S., Lallement, B., Fargeas, S., DeBussac, A., Harris, K., Erickson, G. L., and Wahl, J. B. (January 1, 1998). "SNECMA Experience With Cost-Effective DS Airfoil Technology Applied Using CM 186 LC® Alloy." ASME. J. Eng. Gas Turbines Power. January 1998; 120(1): 97–104. https://doi.org/10.1115/1.2818093
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