A process has been developed for successfully casting a number or prototype aerospace components using the ternary magnesium-lithium-silicon alloy. These components contained many of the design elements anticipated in aerospace hardware of this type.nIt was found that conventional magnesium sand foundry practice was not satis¬factory. A new molding material, based upon bentonité-bonded graphite powder, was employed. Melting and pouring practice was also modified to cope with the reactive nature of the alloynThe radiographic quality of the castings and mechanical properties of test bars section from the castings were evaluated and found to be satisfactory and to correspond with earlier experience on separately cast test bars.
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