Magnesium alloy having superior elevated-temperature...

Details Magnesium alloy having superior elevated-temperature... Magnesium alloy having superior elevated-temperature...

C - Chemistry, Metallurgy

22

C

C22C 23/04 (2006.01) C22C 23/00 (2006.01) C22C 23/02 (2006.01)

Patent

CA 2238070

A magnesium based alloy exhibiting superior elevated-temperature properties such as creep resistance and tensile strength and die castability such as reduced 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 mar have a creep extension of less than about 0.6 % at the tensile stress of about 35 MPa and the temperature of about 150°C, and a tensile yield strength of at least 110 MPa at the temperature of about 150°C. The alloy is particularly useful in die casting applications.

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