Abstract: The invention relates to a nickel-based alloy having a microstructure with a matrix of ?-phase and precipitates of ??-phase. The ??-phase comprises a percentage by volume of from 50 vol % to 80 vol % in the temperature range of from 1000° C. to 1100° C. The nickel-based alloy comprises 8 to 13 at % aluminum, 3 to 14 at % cobalt, 4 to 12 at % chromium, 0.6 to 8 at % molybdenum, 0 to 6 at % rhenium, 0.5 to 4 at % tantalum, 0.5 to 4 at % titanium, 0.3 to 3.5 at % tungsten, 0 to 4 at % germanium, 0 to 0.6 at % hafnium, 0 to 4 at % ruthenium, balance nickel and unavoidable impurities. The concentrations of molybdenum and tungsten are selected such that the percentage X of molybdenum and tungsten in the ?-phase, X=0.84 CMo+CW, is greater than 5.5 at % at a temperature of from 1000° C. to 1100° C., CMo and CW being the concentrations of molybdenum and tungsten in at %.

Abstract: A nickel-base superalloy is disclosed. The superally includes aluminum, cobalt, chromium, molybdenum, tantalum, titanium and tungsten, in addition to nickel, as alloy constituents, wherein rhenium can additionally be contained and the rhenium content is less than or equal to 2 wt. % and wherein the titanium content is greater than or equal to 1.5 wt. %. Further disclosed is a component made of the nickel-base superalloy.

Abstract: Disclosed is process for producing a component of a nickel-based superalloy in which a semifinished part of the component is subjected to a solution heat treatment at a temperature from 1300° C. to 1350° C. and a precipitation heat treatment at a temperature range from 900° C. to 1150° C. The solution heat treatment and/or the precipitation heat treatment are carried out together with further processing of the semifinished part. Also disclosed is a process for treating a component of a nickel-based superalloy after use for some hundreds of hours at a use temperature of more than 500° C. by carrying out a reconditioning heat treatment in the temperature range from 1100° C. to 1280° C.

Abstract: The invention relates to a substantially rhenium-free nickel base alloy showing a high creep resistance and relatively low density which comprises in % by weight: aluminum from 3.0 to 7.7, cobalt from 0 to 16.8, chromium from 3 to 11.8, molybendum from 3.1 to 11.3, tantalum from 0 to 3.9. In addition to nickel and unavoidable impurities this alloy may further comprise one or more of titanium, tungsten, carbon, phosphorus, copper, zirconium, silicon, hafnium, yttrium, niobium, and germanium.

Abstract: Disclosed is a nickel base alloy which is substantially free of rhenium and has a solidus temperature of more than 1320° C. Precipitates of a ??-phase are present in a ?-matrix with a fraction of 40 to 50 vol % at 1050° C. to 1100° C., and a ?/?? mismatch at 1050° C. to 1100° C. is from ?0.15% to ?0.25%. The alloy comprises 11 to 13 at % aluminum, 4 to 14 at % cobalt, 6 to 12 at % chromium, 0.1 to 2 at % molybdenum, 0.1 to 3.5 at % tantalum, 0.1 to 3.5 at % titanium, 0.1 to 3 at % tungsten. The tungsten content of the ?-matrix is greater than that in the precipitated ??-phases.

Abstract: A nickel-based alloy for high-temperature applications, in particular for use in turbomachines, which has a chemical composition as set forth in the claims, wherein the ratio of the fractions of Ta to Al in percent by weight is greater than or equal to 1 and less than or equal to 2, and wherein the ratio of the fractions of Co to W in percent by weight is greater than or equal to 2 and less than or equal to 5.

Abstract: The invention relates to a nickel-based alloy having a microstructure with a matrix of ?-phase and precipitates of ??-phase. The ??-phase comprises a percentage by volume of from 50 vol % to 80 vol % in the temperature range of from 1000° C. to 1100° C. The nickel-based alloy comprises 8 to 13 at % aluminum, 3 to 14 at % cobalt, 4 to 12 at % chromium, 0.6 to 8 at % molybdenum, 0 to 6 at % rhenium, 0.5 to 4 at % tantalum, 0.5 to 4 at % titanium, 0.3 to 3.5 at % tungsten, 0 to 4 at % germanium, 0 to 0.6 at % hafnium, 0 to 4 at % ruthenium, balance nickel and unavoidable impurities. The concentrations of molybdenum and tungsten are selected such that the percentage X of molybdenum and tungsten in the ?-phase, X=0.84CMo+CW, is greater than 5.5 at % at a temperature of from 1000° C. to 1100° C., CMo and CW being the concentrations of molybdenum and tungsten in at %.

Abstract: A nickel-base superalloy is disclosed. The superally includes aluminium, cobalt, chromium, molybdenum, tantalum, titanium and tungsten, in addition to nickel, as alloy constituents, wherein rhenium can additionally be contained and the rhenium content is less than or equal to 2 wt. % and wherein the titanium content is greater than or equal to 1.5 wt. %. Further disclosed is a component made of the nickel-base superalloy.

Abstract: Disclosed is a nickel base alloy which is substantially free of rhenium and has a solidus temperature of more than 1320° C. Precipitates of a ??-phase are present in a ?-matrix with a fraction of 40 to 50 vol % at 1050° C. to 1100° C., and a ?/?? mismatch at 1050° C. to 1100° C. is from ?0.15% to ?0.25%. The alloy comprises 11 to 13 at % aluminum, 4 to 14 at % cobalt, 6 to 12 at % chromium, 0.1 to 2 at % molybdenum, 0.1 to 3.5 at % tantalum, 0.1 to 3.5 at % titanium, 0.1 to 3 at % tungsten. The tungsten content of the ?-matrix is greater than that in the precipitated ??-phases.

Abstract: The invention relates to a method for the production of a starting product for the production of a composite material having a metallic matrix phase and a reinforcement phase, with the following steps: Providing an extruder device having a die (4), Feeding the metallic matrix phase in a first portion of the extruder device, Transport of the metallic matrix phase in the direction of the die (4), Feeding reinforcement particles forming the reinforcement phase in the region of a second portion of the extruder device, Producing a mixture formed from the reinforcement particles and the at least partially melted on metallic matrix phase and further transport of the mixture through the die (4).

Abstract: The invention relates to a process for producing a shaped body from metal foam, including the following steps: a) preparing a first powder, which is formed from the metal, and a second powder, which is formed from a blowing agent, b) feeding the first and second powders to an extrusion device, the first and second powders being in a non-compact form, c) conveying a powder mixture, which is formed from the first and second powders, in the extrusion device towards a casting mold, and, while conveying, at least partially melting the powder mixture to form an at least partially molten powder mixture and applying a pressure to the at least partially molten powder mixture, this pressure being greater than a gas pressure produced by the blowing agent, d) injecting the at least partially molten powder mixture into the casting mold, and e) relieving the pressure in the mold to a level that is lower than the gas pressure, so that the casting mold is completely filled with a metal foam that forms.

Abstract: A method for producing a composite structure in which a foamed metal core (1) is surrounded with a metal body (3). The method includes the following steps: a) producing a foamed metal core (1) with an essentially closed surface; b) introducing the foamed metal core (1) into a pressure die-casting mold; c) filling the pressure die-casting mold at a first casting pressure (p1); d) reducing the first casting pressure (p1) before the pressure die-casting mold has been filled; e) filling the pressure die-casting mold entirely, the first casting pressure (p1) being reduced to zero or almost zero; and f) applying a second casting pressure (p2) and maintaining the second casting pressure for a predetermined holding period.

Abstract: The invention relates to a method for producing a composite structure in which a foamed metal core (1) is surrounded with a metal body (3). Said method comprises the following steps: a) producing a foamed metal core (1) with an essentially closed surface; b) introducing the foamed metal core (1) into a pressure diecasting mould; c) filling said pressure diecasting mould at a first casting pressure (p1); d) reducing said first casting pressure (p1) before the pressure diecasting mould has been filled; e) filling the pressure diecasting mould entirely, the first casting pressure (p1) being reduced to zero or almost zero; and f) applying a second casting pressure (p2) and maintaining this for a predetermined holding period.

Abstract: The invention relates to a process for producing a shaped body from metal foam, comprising the following steps: