A nickel-based superalloy includes, in weight percent, 5.9 to 6.5% aluminum, 9.5 to 10.5% cobalt, 4 to 5% chromium, 0.1 to 0.2% hafnium, 0.3 to 0.7% molybdenum, 3.7 to 4.5% rhenium, 7.5 to 8.5% tantalum, 0.2 to 0.7% titanium, 3.2 to 4% tungsten, 0 to 0.1% silicon, the balance being nickel and unavoidable impurities.

An alloy comprises, by weight: nickel (Ni) as a largest constituent; 6.0% to 7.5% chromium; up to 5.0% cobalt; 5.3% to 6.5% aluminum; up to 5.0% rhenium; 3.7% to 7.0% tungsten; and 3.7% to 7.0% tantalum.

A nickel-based alloy composition consisting, in weight percent, of: between 5.0% and 6.9% aluminium, between 0.0% and 11.0% cobalt, between 6.0% and 11.6% chromium, between 0.0% and 4.0% molybdenum, between 0.0% and 2.0% niobium, between 0.6 and 8.6% tantalum, between 0.0% and 3.0% titanium, between 8.4% and 15.2% tungsten, between 0.02 wt. % and 0.35 wt. % carbon, between 0.001 and 0.2 wt. % boron, between 0.001 wt. % and 0.5 wt. %. zirconium, between 0.0 and 0.5% silicon, between 0.0 and 0.1% yttrium, between 0.0 and 0.1% lanthanum, between 0.0 and 0.1% cerium, between 0.0 and 0.003% sulphur, between 0.0 and 0.25% manganese, between 0.0 and 0.5% copper, between 0.0 and 2.0% hafnium, between 0.0 and 1.0% vanadium, between 0.0 and 4.0% iron, between 0.0 and 1.0% rhenium, the balance being nickel and incidental impurities, wherein the following equations are satisfied in which W.sub.Nb, W.sub.Ta, W.sub.Ti, W.sub.Cr, W.sub.Mo, W.sub.W and W.sub.Re are the weight percent of niobium, tantalum, titanium, chromium, molybdenum, tungsten and rhenium in the alloy respectively 6.6≤2W.sub.Ti+W.sub.Ta+1.44W.sub.Nb, 22.2≥W.sub.W+W.sub.Re+1.16 W.sub.Cr+1.7W.sub.Mo, 13.9≤W.sub.Mo+1.17(W.sub.W+3.3W.sub.Re).

The invention is related to a high gamma prim nickel based superalloy, its use and a method of manufacturing of turbine engine components by welding, 3D additive manufacturing, casting and hot forming, and the superalloy comprises 9.0-10.5 wt. % Cr, 20-22 wt. % Co, 1.0-1.4 wt. % Mo, 5.0-5.8 wt. % W, 2.0-6.0 wt. % Ta, 3.0-6.5 wt. % Al, 0.2-0.5 wt. % Hf, 0.01-0.16 wt. % C, 1.5-3.5 wt. % Re, 0-1.0 Ge wt. %, 0-0.2 wt. % Y, 0-1 wt. % Si, 0-0.015 wt. % B and nickel with impurities to balance.

A nickel-based superalloy comprises in mass percent: 4.0% to 6.0% chromium; 0.4% to 0.8% molybdenum; 2.5% to 3.5% rhenium; 6.2% to 6.6% tungsten; 5.2% to 5.7% aluminum; 0.0 to 1.6% titanium; 6.0% to 9.9% tantalum; 0.0 to 0.7% hafnium; and 0.0 to 0.3% silicon; the balance being constituted by nickel and any impurities. A monocrystalline blade comprises such an alloy and a turbomachine including such a blade.

The invention provides a preparation method of a nickel-based wrought superalloy wheel disk forging used at high temperature, in which the alloy has high content of solution strengthening elements W, Mo and strengthening phase γ′ phase forming elements Al, Ti, Nb and γ′ phase content reaches 55-65%. In view of a series of technical problems caused by high γ′ phase to alloy smelting and forging, the high-temperature stress relief annealing, low-temperature stress relief annealing process of steel ingot and high temperature homogenizing annealing of steel bar were proposed by optimizing the thermal process of wheel disk forging and controlling the precipitation and dissolution of γ′ phase.

An objective of the invention is to provide an Ni-based alloy softened powder that is formed of a high precipitation-strengthened Ni-based alloy material, has better forming/molding processability than ever before, and is suitable for powder metallurgy. The Ni-based alloy softened powder has a chemical composition allowing γ′ phase precipitated in γ phase as a matrix to have an equilibrium precipitation amount of 30-80 volume % at 700° C., has an average particle size of 5-500 μm, and includes particles comprising a polycrystalline body of fine crystals of the γ phase. The γ′ phase is precipitated on grain boundaries of the γ phase fine crystals in an amount of 20 volume % or more. And, the particles have a Vickers hardness of 370 Hv or less at room temperature.

Disclosed herein is a nickel-based heat-resistant material with improved cyclic oxidation properties. The nickel-based heat-resistant material containing gadolinium (Gd) according to the present invention is capable of suppressing the de-lamination of an oxide layer and increasing stability of the oxide layer, thereby forming an overall thin and uniform oxide layer, and has an advantage in that the formation of a nitride may be suppressed since nitrogen is prevented from penetrating through the oxide layer. In addition, due to the slow oxidation rate, there is an advantage in that an Al depletion layer (a γ′ denuded zone) by the formation of an oxide layer may be formed to be very thin compared to that of a specimen having no gadolinium added.

A method for producing three-dimensional magnetic shields with a sufficient permeability from unannealed, soft-annealed, or magnetization annealed magnetically soft metal sheets, wherein the metal sheet is either cold formed into the three-dimensional component in a one-step or multi-step process, then is subjected to a (magnetization) annealing to increase the permeability, and is then transferred to a forming tool, in which it is held and/or pressed in a tool, which has the desired contour of the component, and is optionally shape-corrected or calibrated by the tool, and allowed to cool in the tool, or a sheet is heated and then formed to the desired geometry in a hot-forming tool and held in it, and is allowed to cool in the tool, or the three-dimensional component is generated by additive production and then is subjected to a (magnetization) annealing to increase the permeability; the invention also relates to a shielding device.

A superalloy powder mixture is provided for use with additive manufacturing or welding metal components or portions thereof that includes a high melt superalloy powder and a low melt superalloy powder. The superalloy powder mixture comprises by weight about 4% to about 23% chromium, about 4% to about 20% cobalt, 0% to about 8% titanium, about 1.5% to about 8% aluminum, 0% to about 11% tungsten, 0% to about 4% molybdenum, about 1% to about 13% tantalum, 0% to about 0.2% carbon, 0% to about 1% zirconium, 0% to about 4% hafnium, 0% to about 4% rhenium, 0% to about 0.1% yttrium and/or cerium, 0% to about 0.04% boron, 0% to about 2% niobium, greater than 40% nickel, greater than 4% in total of aluminum and optional titanium content. The high melt superalloy powder includes less than half the content by weight percent of tantalum compared to the content by weight percent of tantalum in the low melt superalloy powder.