Abstract: A method to increase the damping of a substrate using a face-centered cubic damping material foil containing voids.

Abstract: A method to increase the damping of a substrate using a face-centered cubic damping material foil containing voids.

Abstract: A method to increase the damping of a substrate using a face-centered cubic ferromagnetic damping material.

Abstract: A method to increase the damping of a substrate using a face-centered cubic ferromagnetic damping material.

Abstract: A method to increase the damping of a substrate using a face-centered cubic ferromagnetic damping coating.

Abstract: A turbine component having a face-centered cubic ferromagnetic damping coating with high damping loss attributes applied in a non-molten solid state.

Abstract: A method to increase the damping of a substrate using a face-centered cubic ferromagnetic damping coating.

Abstract: A turbine component having a low residual stress ferromagnetic damping coating. The ferromagnetic damping coating may include a ferromagnetic damping material applied in powder form, which may be directed at a surface of the substrate at an application velocity so that it causes partial plastic deformation of the surface while adhering to the surface of the substrate to create a ferromagnetic damping coating. The ferromagnetic damping coating has a balanced coating residual stress, including a tensile quenching stress component and a compressive peening stress component. The resulting coated substrate exhibits a high damping capacity.

Abstract: A method to increase the damping of a substrate using a face-centered cubic ferromagnetic damping coating having high damping loss attributes when a strain amplitude is 500-2000 micro-strain, and/or maximum damping loss attributes that occurs when the strain amplitude is greater than 250 micro-strain, and a turbine component having a face-centered cubic ferromagnetic damping coating.

Abstract: A turbine component having a low residual stress ferromagnetic damping coating. The ferromagnetic damping coating may include a ferromagnetic damping material applied in at least partially molten powder form, which may be directed at a surface of the substrate at an application velocity so that it causes partial plastic deformation of the surface while adhering to the surface of the substrate and solidifying in less than 3 seconds to create a ferromagnetic damping coating, resulting in a coated substrate. The ferromagnetic damping coating has a balanced coating residual stress, including a tensile quenching stress component and a compressive peening stress component. The balanced coating residual stress is within a range of ±50 MPa without having to subject the coated substrate to a high temperature annealing process. The resulting coated substrate exhibits a high damping capacity.

Abstract: A method to increase the damping of a substrate using a face-centered cubic ferromagnetic damping coating having high damping loss attributes when a strain amplitude is 500-2000 micro-strain, and/or maximum damping loss attributes that occurs when the strain amplitude is greater than 250 micro-strain, and a turbine component having a face-centered cubic ferromagnetic damping coating.

Abstract: A method to increase the damping of a substrate using a face-centered cubic ferromagnetic damping coating having high damping loss attributes when a strain amplitude is 500-2000 micro-strain, and/or maximum damping loss attributes that occurs when the strain amplitude is greater than 250 micro-strain, and a turbine component having a face-centered cubic ferromagnetic damping coating.

Abstract: A turbine component having a low residual stress ferromagnetic damping coating. The ferromagnetic damping coating may include a ferromagnetic damping material applied in at least partially molten powder form, which may be directed at a surface of the substrate at an application velocity so that it causes partial plastic deformation of the surface while adhering to the surface of the substrate and solidifying in less than 3 seconds to create a ferromagnetic damping coating, resulting in a coated substrate. The ferromagnetic damping coating has a balanced coating residual stress, including a tensile quenching stress component and a compressive peening stress component. The balanced coating residual stress is within a range of ±50 MPa without having to subject the coated substrate to a high temperature annealing process. The resulting coated substrate exhibits a high damping capacity.

Abstract: A method for applying a low residual stress damping coating to a surface of a substrate is provided. The method includes heating a ferromagnetic damping material in powder form such that the ferromagnetic damping material is at least partially molten. Next, the at least partially molten ferromagnetic damping material is directed at a surface of the substrate at an application velocity so that it adheres to the surface of the substrate to create a ferromagnetic damping coating on the surface of the substrate, resulting in a coated substrate. The ferromagnetic damping coating has a balanced coating residual stress, including a tensile quenching stress component and a compressive peening stress component. The balanced coating residual stress is within a range of ±50 MPa without having to subject the coated substrate to a high temperature annealing process. The resulting coated substrate exhibits a high damping capacity.

Abstract: A coating for an article is provided to enhance vibration damping and fatigue strength, without diluting resistance to erosion, wear, and corrosion for metallic components such as blades, blisks, shafts and bearings of a gas turbine engine operating in a hostile environment. The invention includes a metallic substrate and a thin layer of magneto-mechanical material bonded to the surface of the substrate by a coating process. The coating material is made of the Fe—Cr—Al or Fe—Cr—Mo based magneto-mechanical materials and deposited to the surface of the substrate via a thermal spraying process in vacuum or in air. In order to achieve maximum damping capability and resistance to erosion, wear, and corrosion, several optimal compositions of the coating material in conjunction with new application methods have been developed. The coating is often very thin and smooth in order not to dilute aerodynamic efficiency and fatigue strength.