Erica R Robertson

US Patent:

47708506, Sep 13, 1988

Filed:

Oct 1, 1987

Appl. No.:

7/103137

Inventors:

Franz J. Hehmann - Osnabruck, DE
Erica Robertson - Fairborn OH
Steven J. Savage - Stockholm, SE
Francis H. Froes - Xenia OH

Assignee:

The United States of America as represented by the Secretary of the Air
Force - Washington DC

International Classification:

C22C 2300
B22F 314

US Classification:

420402

Abstract:

A novel magnesium alloy consisting essentially of about 6 to 14 weight percent calcium, about 4 to 8 weight percent of copper or nickel, balance magnesium. There is also provided a process for producing a magnesium alloy article having improved properties which comprises the steps of providing a rapidly solidified product having the composition defined above and having a maximum average thickness of about 200 microns in at least one dimension, introducing the rapidly solidified product into a mold, and consolidating the rapidly solidified product to obtain a desired densification of the rapidly solidified product. Consolidation may be carried out by hot isostatic pressing (HIP'ing) the rapidly solidified product at a pressure of about 100 to 300 MPa and a temperature of about 150. degree. to 350. degree. C. for a time sufficient to obtain the desired densification. Alternatively, consolidation may be accomplished by extrusion using the same temperature range, and an extrusion ratio of about 10:1 to 30:1.