Wrought magnesium alloy having excellent formability and method of producing same
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A wrought magnesium alloy, formability technology, applied to the wrought magnesium alloy with excellent formability and its manufacturing field, can solve the problem that packaging materials cannot be used
Inactive Publication Date: 2007-03-28
PRIMOMETAL CO LTD
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However, this method cannot be applied to packaging materials in consideration of the Galvanic reaction of Li and the increased cost due to the use of excess Li.
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[0015]The present invention is characterized in that fine second phase precipitates (precipitates) coherent with the matrix structure are formed in a solid solution structure having excellent ductility, thereby refining grains and improving formability. The strength of most materials increases as the grain size becomes finer. The reason is that dislocations move along specific slip planes during ductile deformation of metals, so that dislocations cannot move directly from one grain to another. But due to the grain boundary barrier effect (grain boundary barrier effect), the dislocation direction changes its course. Therefore, since the grain boundary acts as a barrier for dislocation movement, dislocations accumulate at the grain boundary, thereby preventing deformation. In order to refine the grain, it must be able to form a high-temperature stable phase, and in order to be coherent with the matrix structure, the required solid solubility at high temperature must be guarante...
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Abstract
Disclosed is a wrought magnesium alloy having excellent strength and extrusion or rolling formability, and a method of producing the same. The wrought magnesium alloy comprises 0.1 - 1.5 at% group IIIa, 1.0 - 4.0 at% group IIIb, 0.35 at% or less of one selected from the group consisting of groups IIa, IVa, VIIa, IVb, and a mixture thereof, 1.0 at% or less of group IIb, and a balance of Mg and unavoidable impurities and thus has a second phase composite microstructure. The wrought magnesium alloy of the present invention has high strength, toughness, and formability in addition to the electromagnetic wave shield ability of magnesium. Accordingly, the wrought magnesium alloy is a material useful to portable electronic goods, such as notebook personal computers, mobile phones, digital cameras, camcorders, CD players, PDA, or MP3 players, automotive parts, such as engine room hoods, oil pans, or inner panel of door, or structural parts for airplane.
Description
technical field [0001] The present invention relates to a wrought magnesium alloy having excellent strength, formability, and corrosion resistance due to containing a second phase composed of an intermetallic compound, and more particularly, the present invention relates to a wrought magnesium alloy and a method for producing the same , the magnesium alloy contains 0.1-1.5 atomic % of group IIIA elements, 1.0-4.0 atomic % of group IIIB elements, equal to or less than 0.35 atomic % of elements selected from the group consisting of group IIA, IVA, VIIA, IVB elements and mixtures thereof At least one element in is equal to or less than 1.0 atomic percent of group IIB elements, and the balance is magnesium and unavoidable impurities, so that the wrought magnesium alloy has a composite structure of a second phase composed of intermetallic compounds. Background technique [0002] Magnesium alloy has a low density of about 1.74-1.95 g / cubic centimeter, and its specific gravity is 2...
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