Magnesium alloy having superior elevated-temperature properties

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

1997-05-21

1999-01-05

Ip, Sikyin

Metal treatment

Stock

Magnesium base

420407, 420408, 420409, 420411, C22C 2300

Patent

active

058556974

ABSTRACT:
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 may have a creep extension of less than about 0.6% at the tensile stress of about 35 MPa and the temperature of about 150.degree. C., and a tensile yield strength of at least 110 MPa at the temperature of about 150.degree. C. The alloy is particularly useful in die casting applications.

REFERENCES:
patent: 5304260 (1994-04-01), Aikawa et al.

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