There is provided a copper alloy bonded body composed of a plurality of members made of an age-hardenable copper alloy, the members diffusion-bonded to one another. The copper alloy bonded body has undergone solution annealing and an aging treatment, the content of beryllium in the age-hardenable copper alloy is 0.7% by weight or less, and (i) a bonding interface between the members has disappeared and/or (ii) a bonding interface between the members remains, and an oxide film at the bonding interface has a thickness of 0 nm or more and 5.0 nm or less.

A vacuum solution and aging treatment process for improving high-temperature plasticity of GH4738 rings includes: heating a GH4738 ring to 1020° C. to 1030° C. in a vacuum environment; injecting nitrogen; subjecting the GH4738 ring to aging treatment at 740° C. to 750° C.; and taking out and air-cooling the GH4738 ring. The method realizes the uniform distribution of the intragranular γ′ precipitates and the intergranular M.sub.23C.sub.6 carbides in the GH4738 ring after heat treatment. The elongation and area reduction of the alloy ring stretched at 540° C. after heat treatment are 30% and 34% respectively, which are 25% and 36% higher than those before process optimization respectively; and that at 760° C. are 49% and 70% respectively, which are 32% and 27% higher than those before process optimization respectively. The index requirements can be fully met. This process is applicable to GH4738 rings, which have a high requirement on high-temperature plasticity after heat treatment.

A vacuum solution and aging treatment process for improving high-temperature plasticity of GH4738 rings includes: heating a GH4738 ring to 1020° C. to 1030° C. in a vacuum environment; injecting nitrogen; subjecting the GH4738 ring to aging treatment at 740° C. to 750° C.; and taking out and air-cooling the GH4738 ring. The method realizes the uniform distribution of the intragranular γ′ precipitates and the intergranular M.sub.23C.sub.6 carbides in the GH4738 ring after heat treatment. The elongation and area reduction of the alloy ring stretched at 540° C. after heat treatment are 30% and 34% respectively, which are 25% and 36% higher than those before process optimization respectively; and that at 760° C. are 49% and 70% respectively, which are 32% and 27% higher than those before process optimization respectively. The index requirements can be fully met. This process is applicable to GH4738 rings, which have a high requirement on high-temperature plasticity after heat treatment.

The present disclosure manufactures a single-crystal metal film oriented only in the (111) crystal plane by bringing seed crystals comprising (111) oriented seeds or (111) single-crystalline seed crystals into contact with a polycrystalline metal precursor and performing heat treatment, thereby manufacturing a single-crystal metal film oriented only in the (111) crystal plane with a high single crystallization rate irrespective of the thickness and shape of the polycrystalline metal precursor. Additionally, the present disclosure obtains a large-area single-crystal metal film with adjusted orientation angle by introducing single-crystal seed crystals into a polycrystalline metal film at a predetermined angle of rotation and performing heat treatment, and manufactures large-area single-layer graphene with adjusted orientation angle using the same, and multilayer graphene with adjusted orientation angle between graphene by stacking the single-layer graphene.

The present disclosure manufactures a single-crystal metal film oriented only in the (111) crystal plane by bringing seed crystals comprising (111) oriented seeds or (111) single-crystalline seed crystals into contact with a polycrystalline metal precursor and performing heat treatment, thereby manufacturing a single-crystal metal film oriented only in the (111) crystal plane with a high single crystallization rate irrespective of the thickness and shape of the polycrystalline metal precursor. Additionally, the present disclosure obtains a large-area single-crystal metal film with adjusted orientation angle by introducing single-crystal seed crystals into a polycrystalline metal film at a predetermined angle of rotation and performing heat treatment, and manufactures large-area single-layer graphene with adjusted orientation angle using the same, and multilayer graphene with adjusted orientation angle between graphene by stacking the single-layer graphene.

The present invention relates to a process for cooling a metal component, the process comprising the step of cooling said component in a confined space, said cooling involving cooling by means of a gas, the gas being cooled by heat exchange with a cooling surface of a heat sink inside said confined space, wherein a low frequency sound wave is provided into said confined space in order to improve heat exchange both between the gas and a cooling surface of the at least one heat sink, and between the gas and the metal component, characterised in that the cooling gas comprises at least one protective inert gas. The invention further relates to an apparatus for performing the process.

Systems and methods of non-contact tensioning of a metal strip during metal processing include passing the metal strip adjacent a magnetic rotor. The magnetic rotor is spaced apart from the metal strip by a first distance. The systems and methods also include tensioning the metal strip through the magnetic rotor by rotating the magnetic rotor. Rotating the magnetic rotor induces a magnetic field into the metal strip such that the metal strip is tensioned in an upstream direction or a downstream direction. In other aspects, rotating the magnetic rotor induces a magnetic field into the metal strip such that a force normal to a surface of the metal strip is applied to the metal strip.

Systems and methods of pre-ageing of a metal strip during metal processing include passing the metal strip adjacent a magnetic rotor of a reheater. The systems and methods also include heating the metal strip through the magnetic rotor by rotating the magnetic rotor. Rotating the magnetic rotor induces a magnetic field into the metal strip such that the metal strip is heated.

A scandium-containing aluminium powder alloy, wires and materials including said alloy, and a method for producing the scandium-containing aluminium powder alloy, the wires and materials, the proportion of scandium in the scandium-containing aluminium powder alloy being elevated, are disclosed. At least one element is selected from the group consisting of the lanthanum group except for Ce, Y, Ga, Nb, Ta, W, V, Ni, Co, Mo, Li, Th, Ag.

A method for forming large titanium parts includes forming bends into a titanium plate for form a bent part. The bent part is then roll-formed to form contours into the bent part. The surfaces of the contoured part are rough-machined, and the part is then secured to a bladed form fixture. The bladed form fixture comprises a plurality of header boards that secure the part to the fixture. The fixture part is placed in a thermal vacuum furnace and a stress-relieving operation is performed. The part is removed from the fixture and final machining takes place.