| 摘要 |
<p>A magnesium base metal component is forged from a billet by subjecting the billet to a forging process using multiple steps in a closed-die or an open-die forging and a forging temperature ranging from 200 °C to 300 °C. The billet is compacted from a rapidly solidified magnesium based alloy defined by the formula MgbalAlaZnbXc, wherein X is at least one element selected from the group consisting of manganese, cerium, neodymium, praseodymium, and yttrium, ''a'' ranges from about 0 to 15 atom percent, ''b'' ranges from about 0 to 4 atom percent, ''c'' ranges from about 0.2 to 3 atom percent, the balance being magnesium and incidental impurities, with the proviso that the sum of aluminum and zinc present ranges from about 2 to 15 atom percent. The alloy has a uniform microstructure comprised of a fine grain size ranging from 0.2-1.0 νm together with precipitates of magnesium and aluminum containing intermetallic phases of a size less than 0.1 νm. Upon being forged the component exhibits, in combination, excellent mechanical strength and ductility, making it especially suited for aerospace structural applications.</p> |
