|About this Abstract
||2017 TMS Annual Meeting & Exhibition
||Energy Materials 2017: Materials for Gas Turbines
||Rejuvenation Process Definition for IN792SX Gas Turbine Blades Aimed to Extend Their Expected Life
||Erica Vacchieri, Paola Guarnone, Elena Bergaglio
|On-Site Speaker (Planned)
The energy market requests drive the GT-OEM to strongly flexible operative regimes and cost reduction maintenance plans. In this perspective, the component life extension is the main target. The extend of maintenance intervals and the number of permissible life cycles are related to the possibility to rejuvenate the HGP critical component microstructure. The rejuvenation for Ni based single crystal superalloy blade is a critical process because recrystallization can occur and the SX alloy chemical composition does not provide grain boundary strengthening, responsible for instantaneous cracks during the following service cycle. In the present paper an alternative rejuvenation process was defined for IN792SX blades, considering components after service and different operating regimes. The microstructural investigations and the quantitative measurements collected through EBSD and DTA allows the definition of the heat treatment plan based on the component condition after service. Quantitative measurements of material recovery was evaluated through mechanical tests.
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