Executive Summary : | The research community is working to find a material that can withstand the demanding conditions in advanced ultra-supercritical (Adv.USC) power plants, specifically rotatory turbomachinery. The main focus is on nickel-based superalloys, such as solid solution-strengthened (SSS) and precipitate-strengthened (PS) superalloys. However, the SSS alloy has limited high-temperature strength, which can be managed using PS superalloys. PS superalloys can be tailored through heat treatment, offering large-scale modulation of mechanical properties. Haynes 282, an advanced PS superalloy, is a potential candidate due to its superior high-temperature strength and corrosion resistance. However, the literature on Haynes 282 alloy lacks broad range thermomechanical processing and the microstructural response. The literature on the influence of precipitation sequence after hot deformation is also lacking. The first objective is to observe the hot deformation and microstructural evolution of Hayness 282, while the literature on thermomechanical processing primarily discusses optimum processing zones and microstructural evolution. The second objective aims to analyze the mechanical properties (tensile strength and hardness) in different optimum thermomechanical conditions using open forging in the processing map. In Adv.USC applications, designing against high-temperature and stress is a significant challenge. The fraction and size of precipitates in Hayness 282 play a crucial role in tailoring fatigue properties. The impact of microstructural evolution on high-temperature low cycle fatigue (HTLCF) behavior of Hayness 282 is still to be discussed. |