Abstract
Abstract Demands for cost-efficiency and a flexible use of gas turbines are constantly increasing, creating a call for new alloys which allow achieving better efficiencies. Today's limit of use of common polycrystalline wrought alloys is 650 °C, whereas the new γ / γ́ wrought alloy AD 730 is designed for use at 700 °C. The presented work examines and discusses the impact of the microstructure on the alloy's creep behavior. Supersolvus and subsolvus solution annealing was performed to provide for a coarse-grained and fine-grained microstructure which was subsequently aged at different aging times.
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