Effects of Re on microstructure evolution of nickel-based single crystal superalloys

The high temperature creep and long-term aging tests of the second-generation (DD6) and the third-generation (DD9) single crystal superalloys with different Re contents were carried out. The effects of Re, dislocations, TCP phases and their interaction on creep properties and microstructure evolution were researched. The third-generation single crystal superalloy has the more compact and uniform two-phase structure and the better creep...