Ni-base superalloys are a class of high-performance materials primarily used in extreme environments such as jet engines, gas turbines, and nuclear reactors. These alloys are composed primarily of nickel, with other elements such as cobalt, chromium, and aluminum added to enhance their mechanical properties, high-temperature strength, and resistance to corrosion and oxidation. Ni-base superalloys are known for their excellent creep and fatigue resistance, as well as their ability to maintain mechanical properties at high temperatures. Research in this area focuses on optimizing alloy compositions, processing techniques, and microstructural design to further improve the performance of these materials in a wide range of applications.