| 摘要 |
A magnesium based alloy exhibiting superior elevated-temperature properties such as creep resistance and tensile strength and die castability such as reduce d hot-cracking and die-sticking, contains about 2 to 9 wt. % aluminum, 6 to 12 wt. % zinc, 0.1 to 2.0 wt. % calcium, optionally 0.2 to 0.5 wt. % manganese, and the balance comprising magnesium. The alloy includes the intermetallic compound Mg-Al-Zn-Ca at the grain boundaries of the magnesium crystals. The alloy according to this invention may have a creep extension of less than about 0.6% at the tensile stre ss of about 35 MPa and the temperature of about 150.degree.C, and a tensile yield stre ngth of at least 110 MPa at the temperature of about 150.degree.C. The alloy is particularl y useful in die casting applications.
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