The magnesium alloy, and vibration damping material

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PROBLEM TO BE SOLVED : To provide a high-strength magnesium alloy excellent in vibration-damping properties; and to provide a vibration damping material. SOLUTION : The magnesium alloy includes one or more first elements selected from Y, Nd, and Sr by 0.01-6 mass% per one element and the balance Mg with inevitable impurities while containing substantially no Al, Zr, Ca, Sn and preferably Mn. Since the magnesium alloy contains the specific first elements within a specific range while containing substantially no specific element, the magnesium alloy has excellent vibration-damping properties due to its low internal friction, high hardness due to its high Vickers hardness, and excellent strength. When one or more second elements selected from Si and rare earth elements (except Y and Nd) are contained by 0.01-4 mass% per one element, the magnesium alloy further has excellent mechanical properties, castability, and corrosion resistance. COPYRIGHT : (C)2012, JPO&INPIT