Heat treatment of an Alloy 282 which has been subjected to an initial solution annealing followed by cooling can be heat treated by heating the Alloy 282 to a temperature between 954° C. and 1010° C. until the gamma prime (γ′) phase is sufficiently dissolved, and cooling the Alloy 282 to a temperature a sufficiently low temperature, and at a sufficiently high cooling rate, to suppress gamma prime precipitation. A component such as a turbine exhaust case and a gas turbine engine made of said alloy can be heat treated in the above manner.

A powder material includes: an atomized powder of an Ni-based alloy containing inclusions, in which a number of particles of the contained inclusions is 100 particles or less per 10,000 particles of the atomized powder. The Ni-based alloy may include at least one additive element selected from Al, Ti and Nb, and the inclusions include at least one of oxide and carbonitride of the additive element.

A method for joining two or more metallic components. The method includes operating a cold-spray apparatus to deposit a feedstock comprising nickel-based alloy particles on a braze region of a first metallic component to form a nickel-containing coating on the braze region. The method also includes brazing the first metallic component and a second metallic component by exposing the braze region to a braze material to form a braze joint that bonds the first metallic component to the second metallic component.

The present invention concerns nickel alloys in powder form comprising at least 40 wt.-% Ni, about 20.0 to 25.0 wt.-% Cr, about 5.0 to 25.0 wt.-% Co and about 1.5 to 5.0 wt.-% Ti, which have a content of B in an amount of less than 40 ppmw. Corresponding alloys have the advantage of providing minimal or no micro-cracks as well as an improved ductility in creep conditions compared to similar alloys having a higher content of B, when the alloys are processed by additive manufacturing to prepare three-dimensional objects. The present invention further concerns processes and devices for the preparation of three-dimensional objects from such nickel alloy powders, processes for the preparation of corresponding nickel alloy powders, three-dimensional objects which are prepared from such nickel alloy powders and the use of such nickel alloy powders to minimize and/or suppress micro-crack formation and/or to provide improved creep ductility.

A method of manufacturing a device includes thermally spraying tungsten carbine in feedstock that does not include Cobalt but that includes Nickel, Copper, or a Nickel-Copper alloy, the method improves the base coating toughness, anticorrosion, and antifouling properties for high load application in sea water and brackish water environments. Additionally, a Cobalt-free material lowers material costs and reduces the global demand of Cobalt. Providing a topcoat of a Silicon-doped DLC significantly reduces the topcoat brittleness of common DLC failures such as “egg shell” in high stress applications. Thus, high hardness, low friction applications may be tailored in high stress applications.

Provided are a nickel-based superalloy and a manufacturing method therefor, and a component and an application. The nickel-based superalloy is prepared from the following raw materials by means of 3D printing. The raw materials include (mass percent): less than or equal to 0.3% of C, less than 5% of Co, 13-15% of W, 20-24% of Cr, 1-3% of Mo, 0.2-0.5% of Al, less than 0.1% of Ti, less than 3% of Fe, less than 0.015% of B, 0.001-0.004% of La, 0.01-0.2% of Mn, and 0.02-0.2% of Si, with the balance being Ni. Average carbide size in a tissue is 150-200 nm, and carbide size distribution is 50 nm to 4 μm.

A method of performing a localized post weld heat treatment on a weld seam in a thin wall metallic body may include attaching thermocouples to the outside surface of the weld seam and covering the weld seam with a thermal insulating blanket. Cooling bands are attached to the outside of the body on both sides of the weld seam. An inert atmosphere enclosure with inlet and exhaust ports is fitted over the weld seam, thermal insulating blanket, and cooling bands. A power supply and control system for an induction coil or coils situated in close proximity to the weld seam are actuated and the weld seam is subjected to a heat treatment without thermally affecting regions of the metallic body adjacent to the weld seam and external to the cooling bands.

The invention proposes the design of a pyrotechnic initiator applied in the aerospace field, including three main components: the housing, the burning bridge and the pyrotechnic dose. The housing has a protective effect and increases the power of the pyrotechnic dose, in which the number of threads and the thread length are calculated to ensure to withstand the fire pressure. The burning bridge generates heat to ignite the ignition dose, the diameter of the bridge is calculated to ensure the resistance of the burning bridge. The pyrotechnic dose consists of 3 ingredient doses, which are the ignition dose, the intermediate dose, and the fire-boosting dose. In which, the mass, composition and density of the doses are calculated to ensure that the required working pressure is created.

In a Ni-base alloy, an area-equivalent diameter D is calculated. D is defined by D=A.sup.1/2 from an area A of a largest nitride in a field of view when an observation area S.sub.0 is observed. This process is repeated in n fields of view for measurement, where n is the number of the fields of view for measurement, so as to acquire n pieces of data on D, and the pieces are arranged in ascending order D.sub.1, D.sub.2, . . . , D.sub.n to obtain a reduced variate y.sub.j. The obtained values are plotted on X-Y axis coordinates, where an X axis corresponds to D and a Y axis corresponds to y.sub.j. In a regression line y.sub.j=a×D+b, y.sub.j is obtained when a target cross-sectional area S is set to 100 mm.sup.2. When the obtained y.sub.j is substituted into the regression line, the estimated nitride maximum size is ≦25 μm in diameter.

A welding filler material includes (in wt.-%): C 0.01-0.05%; N 0.05-0.10%; Cr 20.0-23.0 %; Mn 0.25-0.50 %; Si 0.04-0.10 %; Mo 8.0-10.5 %; Ti 0.75-1.0 %; Nb 3.0-5.0%; Fe max. 1.5%; Al 0.03-0.50%; W 4.0-5.0%; Ta max. 0.5%; Co max. 1.0%; Zr 0.10-0.70% Ni remainder; and impurities resulting from the smelting process.