Formed product of magnesium alloy and magnesium alloy sheet
a technology of magnesium alloy and formed product, applied in the field of magnesium alloy sheet, can solve the problems of poor plastic deformation easy deformation of stainless steel, poor impact resistance of aluminum alloy, etc., and achieve excellent impact resistance.
Inactive Publication Date: 2011-08-25
SUMITOMO ELECTRIC IND LTD
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Benefits of technology
[0045]A formed product of an magnesium alloy of the present invention and a ma
Problems solved by technology
Aluminium alloys, however, have poor plastic deformation resistance and deform quite readily
Method used
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Abstract
A formed product of a magnesium alloy having excellent impact resistance and a magnesium alloy sheet suitable as a material for the formed product are provided. The formed product is produced by press-forming a magnesium alloy sheet having an Al content of 7% by mass to 12% by mass and has a flat portion that is not subjected to drawing deformation. In a metal texture in a cross section of the flat portion in the thickness direction, the number of coarse intermetallic compound (Mg17Al12) particles having a particle size of 5 μm or more present in a surface area region extending from a surface of the flat portion to a position one-third of the thickness from the surface in the thickness direction is five or less. The formed product has a texture in which the number of coarse precipitations d1 is small and in which fine precipitations d0 are dispersed. The formed product is less likely to be dented even when impacted because of dispersion strengthening owing to the fine precipitations and solid-solution strengthening owing to Al that sufficiently forms a solid solution.
Description
TECHNICAL FIELD[0001]The present invention relates to a magnesium alloy sheet suitable as a material for, for example, housings of mobile electronic devices and relates to a formed product of an magnesium alloy, the formed product being produced by press forming. In particular, the present invention relates to a formed product of a magnesium alloy having excellent impact resistance.BACKGROUND ART[0002]Resins, such as acrylonitrile butadiene styrene (ABS) copolymer resins and polycarbonate (PC) resins, and metals, such as aluminium alloys and stainless steel (SUS), have been used as housing materials for mobile electronic devices, such as cellular phones and notebook personal computers.[0003]Magnesium alloys, which are lightweight and excellent in specific strength and specific rigidity, have recently been studied as housing materials described above. Housings of magnesium alloys are mainly formed of cast materials produced by die casting and thixomolding. Press formed sheets of wrou...
Claims
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Login to View More IPC IPC(8): C22C23/02
CPCC22F1/06C22C23/02
Inventor OISHI, YUKIHIROKAWABE, NOZOMUOKUDA, NOBUYUKIMORI, NOBUYUKINUMANO, MASATADAMORI, KOJIKITAMURA, TAKAHIKOINOUE, RYUICHI
Owner SUMITOMO ELECTRIC IND LTD