Abstract: The aluminum alloy in the cross-section of the surface layer region of the aluminum alloy plate contains a compound containing one or more elements selected from the group consisting of silicon, magnesium, iron, copper, manganese, chromium, zinc, zirconium, and titanium, and aluminum. The number of fields of view containing the compound having an equivalent circle diameter of 5 ?m or more out of 10 fields of view extracted from the cross-section is 3 or less. In the cross-section, the number density of the compound having an equivalent circle diameter of 1.5 ?m or more and less than 5.0 ?m is 0.0010 per ?m2 or less, and the area ratio of the compound having an equivalent circle diameter of 0.5 ?m or more is 0.1% or more and less than 1.0%.

Abstract: A covered electrical wire comprises a conductor and an insulating covering layer provided outside the conductor, the conductor being a stranded wire composed of a plurality of copper alloy wires composed of a copper alloy and twisted together, and having a wire diameter of 0.5 mm or less, the copper alloy containing Fe in an amount of 0.1% by mass or more and 1.6% by mass or less, P in an amount of 0.05% by mass or more and 0.7% by mass or less, and one or more elements selected from Ni, Al, Cr and Co in an amount of 0.01% by mass or more and 0.7% by mass or less in total, with a balance being Cu and impurities.

Abstract: An aluminum alloy wire composed of an aluminum alloy, wherein the aluminum alloy contains more than or equal to 0.03 mass % and less than or equal to 1.5 mass % of Mg, more than or equal to 0.02 mass % and less than or equal to 2.0 mass % of Si, and a remainder of Al and an inevitable impurity, Mg/Si being more than or equal to 0.5 and less than or equal to 3.5 in mass ratio, and the aluminum alloy wire has a dynamic friction coefficient of less than or equal to 0.8.

Abstract: A metal member-welded structure includes: a Cu member; an Al member; and a welded portion formed by melting and solidifying each of materials of the Cu member and the Al member. The Cu member includes a Cu-based material containing Cu as a main component. The Al member includes an Al-based material containing Al as a main component and a plating layer that covers a side of the Al-based material, the side being close to a surface of the Cu member. The welded portion includes a sea-island structure in a vicinity of the surface of the Cu member. The sea-island structure includes: a plurality of island portions containing pure Al, and a sea portion interposed among the island portions. The sea portion has a eutectic structure having: a phase of an intermetallic compound of Cu and Al; and a phase of pure Al.

Abstract: An aluminum alloy contains at least 0.03 mass % and at most 1.5 mass % of Mg, at least 0.02 mass % and at most 2.0 mass % of Si, and a remainder composed of Al and an inevitable impurity, a mass ratio Mg/Si being not lower than 0.5 and not higher than 3.5. In a transverse section of the aluminum alloy wire, a rectangular surface-layer void measurement region having a short side of 30 ?m long and a long side of 50 ?m long is taken from a surface-layer region extending by up to 30 ?m in a direction of depth from a surface of the aluminum alloy wire. A total cross-sectional area of voids present in the surface-layer void measurement region is not greater than 2 ?m2.

Abstract: A measurement device measures changes over time of a concentration of a measurement substance that occurs due to a reaction occurring as a result of a solution containing the analyte being dripped onto an electrode, by measuring an electric current that occurs due to electrolysis of the measurement substance. The measurement device applies a first voltage over a first application time period. The measurement device measures a first electric current flowing due to an application of the first voltage. The measurement device applies a second voltage over a second application time period. The measurement device a second electric current flowing due to an application of the second voltage. The measurement device uses the first electric current to normalize the second electric current and measures a concentration of the measurement substance that has changed based on the reaction or a concentration of the analyte that has changed based on the reaction.

Abstract: An aluminum alloy contains equal to or more than 0.005 mass % and equal to or less than 2.2 mass % of Fe, and a remainder of Al and an inevitable impurity. In a transverse section of the aluminum alloy wire, a surface-layer void measurement region in a shape of a rectangle having a short side length of 30 ?m and a long side length of 50 ?m is defined within a surface layer region extending from a surface of the aluminum alloy wire by 30 ?m in a depth direction, and a total cross-sectional area of voids in the surface-layer void measurement region is equal to or less than 2 ?m2.

Abstract: A connection terminal having a copper alloy as a base material, the copper alloy comprising Zn in an amount of 21 mass % or more and 27 mass % or less, Sn in an amount of 0.6 mass % or more and 0.9 mass % or less, Ni in an amount of 2.5 mass % or more and 3.7 mass % or less, and P in an amount of 0.01 mass % or more and 0.03 mass % or less, and the balance being Cu and inevitable impurities, wherein the copper alloy has: a 0.2% proof stress of 620 MPa or higher and 700 MPa or lower, and an electrical conductivity of 15% IACS or higher and 20% IACS or lower.

Abstract: An electrical wire arrangement structure includes: a base member; and an electrical wire group including four or more electrical wires, wherein the electrical wire group includes a parallel arrangement part fixed in a parallel state by the base member, and in the parallel arrangement part, an average value of sizes between the electrical wires in a central part region in a width direction is larger than an average value of sizes between the electrical wires in both side part regions in a width direction.

Abstract: An electric wire conductor having both flexibility and a space-saving property. Also provided are a covered electric wire and a wiring harness containing the electric wire conductor. An electric wire conductor contains a wire strand containing a plurality of elemental wires twisted together. The electric wire conductor has a flat portion in which a cross section intersecting an axial direction of the wire strand has a flat shape. Assuming a conductor cross-sectional area of the flat portion as s mm2 and a vacancy ratio defined as a ratio of vacancies not occupied by the elemental wires in a cross section of the flat portion as v %, the conductor cross-sectional area and the vacancy ratio satisfies v>0.29 s+2.0. The covered electric wire contains electric wire conductor and an insulator covering the conductor. The wiring harness contains the covered electric wire.

Abstract: A covered electrical wire comprises a conductor and an insulating covering layer provided outside the conductor, the conductor being a stranded wire composed of a plurality of copper alloy wires composed of a copper alloy and twisted together, and having a wire diameter of 0.5 mm or less, the copper alloy containing Fe in an amount of 0.1% by mass or more and 1.6% by mass or less, P in an amount of 0.05% by mass or more and 0.7% by mass or less, and one or more elements selected from Ni, Al, Cr and Co in an amount of 0.01% by mass or more and 0.7% by mass or less in total, with a balance being Cu and impurities.

Abstract: An aluminum alloy contains equal to or more than 0.005 mass % and equal to or less than 2.2 mass % of Fe, and a remainder of Al and an inevitable impurity. In a transverse section of the aluminum alloy wire, a surface-layer void measurement region in a shape of a rectangle having a short side length of 30 ?m and a long side length of 50 ?m is defined within a surface layer region extending from a surface of the aluminum alloy wire by 30 ?m in a depth direction, and a total cross-sectional area of voids in the surface-layer void measurement region is equal to or less than 2 ?m2.

Abstract: A covered electrical wire comprises a conductor and an insulating covering layer provided outside the conductor, the conductor being a stranded wire composed of a plurality of copper alloy wires composed of a copper alloy and twisted together, and has a wire diameter of 0.5 mm or less, the copper alloy containing Ni, or Ni and Fe in an amount of 0.1% by mass or more and 1.6% by mass or less in total, and P in an amount of 0.05% by mass or more and 0.7% by mass or less, with a balance being Cu and impurities, in the copper alloy, a ratio of precipitation of P to solid solution of P being 1.1 or more.

Abstract: An aluminum alloy having a composition including 0.1% by mass or more and 2.8% by mass or less of Fe; and 0.002% by mass or more and 2% by mass or less of Nd.

Abstract: An aluminum alloy contains at least 0.03 mass % and at most 1.5 mass % of Mg, at least 0.02 mass % and at most 2.0 mass % of Si, and a remainder composed of Al and an inevitable impurity, a mass ratio Mg/Si being not lower than 0.5 and not higher than 3.5. In a transverse section of the aluminum alloy wire, a rectangular surface-layer void measurement region having a short side of 30 ?m long and a long side of 50 ?m long is taken from a surface-layer region extending by up to 30 ?m in a direction of depth from a surface of the aluminum alloy wire. A total cross-sectional area of voids present in the surface-layer void measurement region is not greater than 2 ?m2.

Abstract: An aluminum alloy contains equal to or more than 0.005 mass % and equal to or less than 2.2 mass % of Fe, and a remainder of Al and an inevitable impurity. In a transverse section of the aluminum alloy wire, a surface-layer void measurement region in a shape of a rectangle having a short side length of 30 ?m and a long side length of 50 ?m is defined within a surface layer region extending from a surface of the aluminum alloy wire by 30 ?m in a depth direction, and a total cross-sectional area of voids in the surface-layer void measurement region is equal to or less than 2 ?m2.

Abstract: A covered electrical wire comprising a conductor and an insulating covering layer provided outside the conductor, the conductor being a stranded wire composed of a strand of a plurality of copper alloy wires: composed of a copper alloy containing Fe in an amount of 0.1% by mass or more and 1.6% by mass or less, P in an amount of 0.05% by mass or more and 0.7% by mass or less, and Sn in an amount of 0.05% by mass or more and 0.7% by mass or less, with the balance being Cu and impurities; and having a wire diameter of 0.5 mm or less, the copper alloy wire having a tensile strength of 385 MPa or more and a work-hardening exponent of 0.1 or more.

Abstract: A covered electrical wire comprises a conductor and an insulating covering layer provided outside the conductor, the conductor being a stranded wire composed of a strand of a plurality of copper alloy wires: composed of a copper alloy containing Fe in an amount of 0.2% by mass or more and 1.6% by mass or less, P in an amount of 0.05% by mass or more and 0.4% by mass or less, and Sn in an amount of 0.05% by mass or more and 0.7% by mass or less, with the balance being Cu and impurities, and having a mass ratio of Fe/P of 4.0 or more; and having a wire diameter of 0.5 mm or less.

Abstract: An aluminum alloy contains at least 0.03 mass % and at most 1.5 mass % of Mg, at least 0.02 mass % and at most 2.0 mass % of Si, and a remainder composed of Al and an inevitable impurity, a mass ratio Mg/Si being not lower than 0.5 and not higher than 3.5. In a transverse section of the aluminum alloy wire, a rectangular surface-layer void measurement region having a short side of 30 ?m long and a long side of 50 ?m long is taken from a surface-layer region extending by up to 30 ?m in a direction of depth from a surface of the aluminum alloy wire. A total cross-sectional area of voids present in the surface-layer void measurement region is not greater than 2 ?m2.

Abstract: A metal member-welded structure includes: a Cu member; an Al member; and a welded portion formed by melting and solidifying each of materials of the Cu member and the Al member. The Cu member includes a Cu-based material containing Cu as a main component. The Al member includes an Al-based material containing Al as a main component and a plating layer that covers a side of the Al-based material, the side being close to a surface of the Cu member. The welded portion includes a sea-island structure in a vicinity of the surface of the Cu member. The sea-island structure includes: a plurality of island portions containing pure Al, and a sea portion interposed among the island portions. The sea portion has a eutectic structure having: a phase of an intermetallic compound of Cu and Al; and a phase of pure Al.