MC-NG: A 4th Generation Single-Crystal Superalloy for Future Aeronautical Turbine Blades and Vanes

Atomic mechanism of the Re and Ru strengthening effect on the γ-γ′ interface of Ni-based single-crystal superalloys: A first-principles study

“…As a promising alternative to the third-generation superalloys, the fourthgeneration alloys can increase the temperature capability without imposing high density and microstructural instabilities. The alloys, with Ru partially substituting for Re, clearly show better oxidation and corrosion resistance (Argence et al 2000), significantly higher creep strength and less propensity to the precipitation of TCP phases.…”

“…In the past few years, the growing demand for increasing inlet temperature in turbine blades has led to the development of a new generation of SC superalloys. It is reported that the so-called fourth or new generation of Ni-based SC superalloys containing both Re and Ru can achieve an excellent balance of properties (Argence et al 2000). As a promising alternative to the third-generation superalloys, the fourthgeneration alloys can increase the temperature capability without imposing high density and microstructural instabilities.…”

Surface topography evolution of Ni-based single crystal superalloy under laser shock: Formation of the nano-scale surface reliefs

“…It can be concluded that the closure effect of pores relying on the compressive stress caused by laser shock results in the vanishment of shrinkages, and the disappearance of the shrinkages has a inhibitory effect on crack initiation [26].…”

Effect of Ruthenium on Microstructure and Stress Rupture Properties of a Single Crystal Nickel-Base Superalloy

“…In recently developed fourth generation single crystal alloys, such as TMS-138, TMR-139, TMS-162 and MC-NG, the content of Re decreased from 6% which is the usual content in third generation single crystal alloys to 4 ～ 5 wt.%, and added 2 ～ 4 wt.% of Ru to prevent the formation of TCP phase [7,8] . The elemental electron hole numbers, Nv, of these new single crystal alloys were controlled within the values smaller than 2 to increase the microstructure stability for high temperature service of the alloys.…”

“…The elemental electron hole numbers, Nv, of these new single crystal alloys were controlled within the values smaller than 2 to increase the microstructure stability for high temperature service of the alloys. There have been quite few reports on the effect of Ru on the microstructure and stress rupture properties of single crystal superalloys [6][7][8][9][10] .…”