manufactured single crystal components using ni-base super alloys are routinely used in the hotsections of aero engines and industrial gas turbines due to their outstanding high temperaturestrength, toughness and resistance to degradation in corrosive and oxidative environments. tocontrol the quality of the single crystal turbine blades, particular attention has been paid to grainselection, whi...

Damping measurements were carried out on two-phase (y-matrix, y'-precipitates) nickel-base alloys containing different volume fractions of y' in order to achieve a better understanding of the strong elastic modus decrease between 1000°C and 1 100°C. For the investigation of the damping a free-free beam flexural vibration technique was applied. Nickel-base alloys with a high volume fraction of y...

Various alloy compositions were cast as single crystals in a Bridgman vacuum induction furnace and creep tested at 980 °C: pure Ni, the equiatomic alloys CoCrNi CrMnFeCoNi (Cantor alloy), single-phase fcc (Ni) solid solution (with composition of matrix-phase CMSX-3 CMSX-4), two-phase Ni-based superalloys CMSX-4. Due to single-crystal state, grain size effects, boundary sliding, diffusion can be...

Abstract Super-solidus hot isostatic pressing (SSHIP) heat treatment has first been developed and applied to the third-generation Ni-base single crystal superalloy CMSX-10 K. This new type of aims at significantly reducing total time required for solution enhancing mechanical properties as compared conventional routes. The SSHIP is an innovative, economical sustainable approach that can be all ...

We describe a group of alloys that exhibit "super" properties, such as ultralow elastic modulus, ultrahigh strength, super elasticity, and super plasticity, at room temperature and that show Elinvar and Invar behavior. These "super" properties are attributable to a dislocation-free plastic deformation mechanism. In cold-worked alloys, this mechanism forms elastic strain fields of hierarchical s...

Abstract The present work shows that thermal expansion experiments can be used to measure the γʼ-solvus temperatures of four Ni-base single-crystal superalloys (SX), one with Re and three Re-free variants. In case CMSX-4, experimental results are in good agreement numerical thermodynamic obtained using ThermoCalc. For alloys, calculated close. Transmission electron microscopy chemical compositi...

Manufactured single crystal components using Ni-base super alloys are routinely used in the hot sections of aero engines and industrial gas turbines due to their outstanding high temperature strength, toughness and resistance to degradation in corrosive and oxidative environments. To control the quality of the single crystal turbine blades, particular attention has been paid to grain selection,...

Abstract Single crystal Nickel-based superalloys exhibit an anomalous yield point, the stress increasing with temperature to a maximum at around 750 ºC. Here, we demonstrate in alloy CMSX-4 ºC that, although there is virtually no effect of strain rate on initial slow rates second mechanism can initiate leading considerable softening effect. By examining microstructures series interrupted tests,...

Manufactured single crystal components using Ni-base super alloys are routinely used in the hot sections of aero engines and industrial gas turbines due to their outstanding high temperature strength, toughness and resistance to degradation in corrosive and oxidative environments. To control the quality of the single crystal turbine blades, particular attention has been paid to grain selection,...