High mechanical strength magnesium alloys and process for obtaining these by rapid solidification

The invention relates to high mechanical strength magnesium alloys and to a process for producing these alloys by fast solidification and consolidation by drawing generally exceeding 400 or 500 MPa, an elongation at break of generally at least 5% and a chemical composition by weight within the following limits:

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    Aluminium        2-11%
    Zinc             0-12%
    Manganese        0-1%
    Calcium        0.5-7%
    Rare Earths    0.1-4%
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with the main impurities and the residue being magnesium, their structure being constituted by grains with a mean size below 3 .mu.m and intermetallic compounds with a size below 2 .mu.m precipitated at the grain boundaries.