Transient titanium alloys

Details Transient titanium alloys Transient titanium alloys

1982-06-10

1983-11-15

Skiff, Peter K.

Metal treatment

Compositions

Heat treating

148133, 148421, C22F 118

Patent

active

044153759

ABSTRACT:
Transient titanium alloys having the composition A-XH, where A is titanium or a titanium alloy, such as, Ti-8Al-1Mo-1V, Ti-5Al-2.5Sn, Ti-6Al-4V, or Ti-6Al-2Sn-4Zr-2Mo; where H represents hydrogen and where X is a weight percent value between about 0.01 and 0.5%. The alloys may be produced by heating the base titanium or titanium alloy under pressure in a non-flammable atmosphere containing hydrogen. The alloys containing hydrogen may be formed by superplastic forming techniques. After forming, the original titanium or titanium alloy can be restored by heating the formed part or structure, under vacuum, driving out the hydrogen from the alloy. Parts and structures formed from the transient alloy, and restored, retain the strength and structural integrity of the base alloy.

REFERENCES:
patent: 2892742 (1959-06-01), Zwicker et al.
Kolachov et al., "The Influence of Hydrogen on Hot Deformability of Titanium Alloys with Different Phase Compositions," Titanium and Titanium Alloys, vol. 3, Plenum Press, 1982, pp. 1833-1842.
Jovane, "Superplasticity in Titanium", The Science, Technology, and Application of Titanium, Pergammon Press, N.Y., 1970, pp. 615-623.

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