Friction stir welding (FSW) of titanium alloy was carried out using liquid cooling the FSW tool made heat-resistant nickel superalloy. Cooling superalloy performed by means circulating water inside tool. The joints were characterized microstructures and mechanical strength. strength higher than that base metal.

Elemental diffusion drives the microstructure development in MCrAlY-superalloy systems at high temperature. In this paper, two models were built to simulate behavior of elements coating or coating–substrate system. Firstly, a core–shell model was set up investigate thermodynamic and kinetic localized microstructure. The results simulation successfully explained mechanism formation α(core)–γ′(sh...

Formation of stray grain defects particularly around re-entrant features of the turbine blade airfoils is one of the major problems in directional and single crystal solidification processes. In this work, directional solidification tests of the GTD-111 Ni-based superalloy were conducted at different withdrawal velocities of 3, 6 and 9 mm.min-1 using various stepped cylindrical and cubic design...

Crucible is the indispensable vessel in smelting of superalloy, and service life crucibles quite important to development superalloy. In order extend crucible for superalloy smelting, alumina-based are prepared by slip casting, mullite fibers used as reinforcement phase. The effect on microstructure property was studied. appropriate content beneficial comprehensive performance crucibles. mechan...

This work designs a silica (SiO2) layer on molybdenum metal core to provide new insights the corrosion resistance of silica/silicide coating in Ni-based superalloy. The substrate coated with MoSi2 by pack cementation was pre-oxidized fabricate cristobalite scale surface and preoxidation specimens were chosen examine corrosion-resistant property using DSM11 superalloy at 1550 °C. In order prepar...

Creep lifetime of turbine blade material subjected to sustained centrifugal forces at elevated temperatures is limited by accumulated inelastic deformation and creep crack growth (CCG). Creep resistance exhibited in conventionally cast polycrystalline (PC) Ni-base superalloy components has been enhanced via solidification techniques. Directional solidification (DS) results in large grain sizes ...

Introduction ................................................................................................................................1 Overview of Weldability of Nickel-Base Superalloys..................................................................1 Crystallography............................................................................................................................

The evolution of the surface roughness of an initially flat platinum-modified nickel aluminide (NiPtAl) coating on a single crystal superalloy with cyclic oxidation has been measured by optical profilometry and correlated with the aluminide microstructure. The roughness evolution is dominated by the relative motion of individual grains on thermal cycling, with the larger sized grains moving up ...

The mechanical properties of GH4169 alloy sheet after cold rolling (at 0%, 10%, 30%, 50% and 70%) and solid solution were investigated. The textures and Taylor factors were characterized using electron backscattering diffraction (EBSD). The fractions of δ phase were measured by X-ray diffraction. The contributions of δ phase, grain size, texture, and work hardening on the mechanical properties ...

Microstructure, phase composition and mechanical properties of a refractory high entropy superalloy, AlMo0.5NbTa0.5TiZr, are reported in this work. The alloy consists of a nano-scale mixture of two phases produced by the decomposition from a high temperature body-centered cubic (BCC) phase. The first phase is present in the form of cuboidal-shaped nano-precipitates aligned in rows along <100>-t...