| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a magnesium alloy material excellent in impact resistance. <P>SOLUTION: The magnesium alloy material comprises a magnesium alloy containing more than 7.5 mass% of Al, and has a Charpy impact value of 30 J/cm<SP>2</SP>or more. Typically, the magnesium alloy material satisfies the elongation of 10% or more in a high-speed tensile tester at an elastic stress rate of 10 m/s. The magnesium alloy has precipitate particles dispersed therein, typically each of the particle comprise an intermetallic compound containing at least one of Al and Mg and has an average particle diameter of 0.05 to 1μm, wherein the total area of the particles is 1 to 20 area%. The magnesium alloy material has such a structure that fine precipitate particles are dispersed therein and, as a result, has high impact absorption ability and is excellent in impact resistance by virtue of dispersion strengthening. <P>COPYRIGHT: (C)2011,JPO&INPIT</p> |
