Abstract: An aluminum alloy for microporous hollow shape material use constituted by an aluminum alloy which has excellent corrosion resistance and extrudability which keeps down the content of Cu which poses a problem in intergranular corrosion resistance, which maintains the natural potential noble, which adds transition metals which do not obstruct the extrudability is provided, that is, an aluminum alloy which has a chemical composition which contains, by mass %, Fe: 0.05 to 0.20%, Si: 0.10% or less, Cu: 0.15 to 0.32%, Mn: 0.08 to 0.15%, Zr: 0.05% or less, Ti: 0.06 to 0.15%, Cr: 0.03% or less, and balance: Al and unavoidable impurities and has an amount of gas in the alloy billet of 0.25 cc/100 g or less, and a method of production of an aluminum alloy which, produces a DC cast billet.

Abstract: An aluminum alloy for microporous hollow shape material use constituted by an aluminum alloy which has excellent corrosion resistance and extrudability which keeps down the content of Cu which poses a problem in intergranular corrosion resistance, which maintains the natural potential noble, which adds transition metals which do not obstruct the extrudability is provided, that is, an aluminum alloy which has a chemical composition which contains, by mass %, Fe: 0.05 to 0.20%, Si: 0.10% or less, Cu: 0.15 to 0.32%, Mn: 0.08 to 0.15%, Zr: 0.05% or less, Ti: 0.06 to 0.15%, Cr: 0.03% or less, and balance: Al and unavoidable impurities and has an amount of gas in the alloy billet of 0.25 cc/100 g or less, and a method of production of an aluminum alloy which, produces a DC cast billet.

Abstract: Provided as an aluminum alloy for finely hollow shapes is an aluminum alloy that is reduced in the content of Cu, which is problematic with respect to intergranular corrosion resistance, and that can be kept having a noble self-potential and has excellent extrudability. The alloy has a chemical composition which contains 0.05-0.15 mass % Fe, up to 0.10 mass % Si, 0.03-0.07 mass % Cu, 0.30-0.55 mass % Mn, 0.03-0.06 mass % Cr, and 0.08-0.12 mass % Ti and which optionally further contains up to 0.08 mass % V so as to satisfy the relationship Ti+V=0.08 to 0.2 mass %. Also provided is a process for producing a finely hollow aluminum alloy shape.

Abstract: A method for producing an aluminum composite material having a great content of a ceramics with ease. The method (a) mixes an aluminum powder and ceramic particles, to prepare a mixed material, (b) subjects the mixed material to electric pressure sintering together with a metal sheet material, to form a clad material including a sintered product covered with the metal sheet material, and (c) subjects the clad material to a plastic working to prepare an aluminum composite material. In the (b) subjecting, the mixed material is sandwiched between a pair of metal sheets or a powder of the mixed material is held in a metal container, the mixed material is placed in a forming die in a state in which the metal sheet material is pressurized by a punch, and the mixed material is compressed together with the metal sheet material. The metal sheet material is made of aluminum or stainless steel.

Abstract: A method for producing an aluminum composite material having a great content of a ceramics with ease. The method (a) mixes an aluminum powder and ceramic particles, to prepare a mixed material, (b) subjects the mixed material to electric pressure sintering together with a metal sheet material, to form a clad material including a sintered product covered with the metal sheet material, and (c) subjects the clad material to a plastic working to prepare an aluminum composite material. In the (b) subjecting, the mixed material is sandwiched between a pair of metal sheets or a powder of the mixed material is held in a metal container, the mixed material is placed in a forming die in a state in which the metal sheet material is pressurized by a punch, and the mixed material is compressed together with the metal sheet material. The metal sheet material is made of aluminum or stainless steel.

Abstract: An aluminum-based extruded neutron absorber comprising a body portion consisting of an aluminum alloy containing boron or a boron compound including isotopes having the ability to absorb neutrons at a boron content of 20-40% by mass; and a surface layer portion consisting of an aluminum alloy whose boron content is 1% by mass or less, and a production method thereof. An aluminum alloy material is prepared as an extruded material or a can, a boron or boron compound powder is mixed with an aluminum alloy powder, and when using a can, the can is filled with the mixed powder to form a preliminary compact, and when using an extruded material the mixed powder is press-formed to produce a preliminary compact, which is then extruded. A neutron absorber that exhibits excellent neutron absorbing ability, and excels in heat dissipation, workability and weldability is obtained.

Abstract: Sintered pieces of rapid-solidified aluminum alloy powder are friction stir welded together. The sintered piece may be composite material dispersing ceramic particle therein. A welding aid, which disperses the same ceramic particle as those in the sintered pieces, may be sandwiched between or mounted on the sintered pieces. A weld zone is formed without melting, so as to inhibit formation of blowholes or coarsening of metallographic structure. Consequently, the sintered pieces are welded together while retaining intrinsic properties of the sintered aluminum alloy.

Abstract: The method of making a profiled work of aluminum or aluminum alloy comprises the steps of loading a billet of aluminum or aluminum alloy in a container having an extruding die at its one end and urging the billet against the extruding die by a ram so as to extrude the billet through the die to form a profiled work of aluminum or aluminum alloy with its cross-section conforming with that of the die. A disc of aluminum or aluminum base alloy containing at least one or two elements selected from the group consisting of elements B, Be, Ti, Zr, W, Mo and V is located between the extruding die and the billet before the billet is extruded.