فهرست نشریات علمی دسترسی آزاد ایران

 Waspaloy is a wrought Ni-based superalloy that is widely used in high-temperature structural applications requiring strength retention and performance at elevated temperatures, such as gas turbine engines and aerospace components. This study primarily focuses on the exploration of the impact of heat treatment on the microstructure and high-temperature mechanical properties of the Waspaloy superalloy. The experiment involved processing the alloy in both hot-rolled and cold-rolled conditions, followed by stabilization at 845 ℃ and aging at various temperatures: 730 ℃, 760 ℃ and 800 ℃. Subsequent mechanical property evaluations were conducted using hardness, hot tensile, and stress rupture tests. To examine the microstructural changes, we employed optical and scanning electron microscopy. Our findings revealed that the cold-rolled specimen, aged at 730 ℃, exhibited the highest hardness, 581 Vickers. Moreover, our hot tensile test results showed a maximum yield strength of 1340 MPa and an ultimate tensile strength of 1404 MPa for the cold-rolled specimen after aging at 730 ℃. The stress rupture test revealed a rupture time of 46 hours for the cold-rolled specimens and 36 hours for the hot-rolled specimens, attributable to the increased size and volume fraction of γ' precipitates in the cold-rolled alloy.