Intermediate temperature creep damage mechanisms of a directionally solidified Ni-based superalloy

Damage nucleation during transverse creep of a directionally solidified Ni-based superalloy

“…The substantial decrease observed in creep life and creep strain at rupture have previously been reported for different Ni-based superalloys during transverse creep and explained by the development of significant stress concentration near HAGBs [11,13] or/and by oxidation assisted crack nucleation [13,14]. Similar results were also observed recently by Torfeh et al [27] for GTD111DS tested along longitudinal direction or by Alkmin et al [28] in conventional cast Mar-M246. Stinville et al [11] observed on GDT444 bycrystals with transverse grain boundaries rupture before the tertiary creep regime.…”

Modeling of Creep Deformation Behavior of DZ411 and Finite Element Simulation of Turbine Blade

“…With the continuous increase in the turbine inlet temperature of aero-engines and gas turbines, the creep problem is becoming increasingly prominent in high-temperature structural components [1]. In long-term high-temperature and high-load environments, creep deformation inevitably occurs in turbine blades [2,3]. There is a complex internal structure in rotor blades, including elements such as the film-cooling hole, exhauster window, inner cavity, and transition fillet.…”