Aluminum alloy wire, aluminum alloy strand wire, covered electrical wire, and terminal-equipped electrical wire

An aluminum alloy wire composed of an aluminum alloy,

• the aluminum alloy containing 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 μm long and a long side of 50 μm long being taken from a surface-layer region extending by up to 30 μm 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 being not greater than 2 μm2,
• the aluminum alloy wire having
• a diameter not smaller than 0.1 mm and not greater than 3.6 mm, and
• a terminal fixing force per unit area of the aluminum alloy wire is equal to or more than 114 N/mm2 and equal to or less than 316 N/mm2.