ALUMINUM ALLOY PLASTIC WORKED ARTICLE, METHOD FOR MANUFACTURING THE SAME, AND AUTOMOBILE COMPONENT

摘要

To provide an aluminum alloy plastic worked article in which an aluminum texture state having preferable corrosion resistance and preferable mechanical characteristics in terms of, for example, the strength, the proof stress, and the elongation is formed.;In an aluminum alloy plastic worked article including a plastic worked portion which is formed of a thinned portion 22 formed by plastic working and rib portions 21 formed at two ends of this thinned portion 22 and which has an approximately H-shaped or U-shaped cross-section, the plastic worked portion is a plastic worked portion 2 having strain portions 23 in each of which an equivalent strain of up to 4.0 mm/mm generated by plastic working is present, and the strain portions 23 are each located in the vicinity of the surface of the plastic worked portion 2 at a boundary between the thinned portion 22 and each of the rib portions 21 and are each formed of a non-recrystalline texture N of aluminum (atomic symbol: Al) which is not recrystallized or are each formed of the non-recrystalline texture N and a fine crystalline texture M which is recrystallized but has a crystal grain of 500 μm or less.

主权项

1. An aluminum alloy plastic worked article characterized by comprising: a plastic worked portion which is formed of a thinned portion formed by plastic working and rib portions formed at two ends of this thinned portion and which has an approximately H-shaped or U-shaped cross section,
wherein the plastic worked portion has strain portions in each of which an equivalent strain of up to 4.0 mm/mm generated by the plastic working is present, the strain portions are each located in the vicinity of the surface of the plastic worked portion at a boundary between the thinned portion and each of the rib portions, and the strain portions are each formed of a non-recrystalline texture of aluminum (atomic symbol: Al) which is not recrystallized or are each formed of the non-recrystalline texture and a fine crystalline texture of the aluminum which is recrystallized but has a crystal grain of 500 μm or less.