MAGNESIUM ALLOYS

摘要

A magnesium-based alloy for casting contains at least 88% magnesium, 1.6-3.5% silver, 0.1-2.3% of rare earth metals comprising at least 60% neodymium, 0-2.3% thorium and 0.1-2.5% yttrium. When no more than 0.5% of yttrium is present the minimum amount of thorium is given by the equation ¢Th! = . Other elements may be present to improve the alloy properties. Alloys of these compositions have advantagous mechanical properties such as resistance to creep at elevated temperatures.