The effect of solution heat treatment on a single-crystal Ni-based superalloy
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Understanding of the solution heat treatment response of a second generation, single-crystal nickel-based superalloy, CMSX-4, is necessary before the process can be shortened in an effort to save money. The current solution heat treatment used for CMSX-4 involves high temperatures for long durations and can be quite expensive. This investigation helps to characterize the heat-treatment process for this alloy. The achieved microstructure is described for both the as-cast and fully solution-annealed conditions. In addition, an alternate, less expensive heat treatment was selected for its lower temperatures and shorter overall duration. Microstructures and differential thermal analysis are presented for all three conditions.
KeywordsHeat Treatment Solution Heat Treatment Dendrite Core Heat Treatment Sample Eutectic Region
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