Single-crystal Ni-base superalloys, consisting of a two-phase γ/ γ ' microstructure, retain high strengths at elevated temperatures and are key materials for high temperature applications, like, e.g., turbine blades of aircraft engines. The lattice misfit between the γ and γ ' phases results in internal stresses, which significantly influence the deformation and creep behavior of the material. ...

This paper presents results from a research initiative aimed at investigating high temperature creep deformation mechanisms in Ni-base superalloys through a combination of creep experiments, TEM deformation mechanism characterization, and state of the art modeling techniques. The effect of microstructure on dictating creep rate controlling deformation mechanisms was revealed for specimens with ...

The dissolution of nano-sized Ni3Al-based γ′ precipitates was investigated in the newly developed polycrystalline nickel-based VDM® Alloy 780 at surface and bulk region with in-situ lab-source synchrotron X-ray diffraction. These studies are important obtaining a deeper understanding strengthening mechanism responsible for stability long service lives such superalloys. We found that behavior ph...

We consider the Gamma limit of the Abelian Chern-Simons-Higgs energy

As an important mechanical property, tensile behavior has been regarded as indicator for the creep and thermal fatigue properties of Ni-based superalloys. The property superalloys is closely related to amount, size, distribution γ'-phase carbides. To further clarify deformation mechanism CM247LC alloy, this study investigated its solidification characteristics directionally-solidified heat-trea...