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Method for preparing ultrafine-grained metallic foil

United States Patent Application

20050126666
A1
View the Complete Application at the US Patent & Trademark Office
Los Alamos National Laboratory - Visit the Technology Transfer Division Website
Coarse-grained titanium and ultrafine-grained (UFG) titanium billets were processed into titanium foil cold rolling and intermediate annealing. The foil produced from the UFG titanium billet exhibits a homogeneous nanostructure. By contrast, foil produced by cold rolling the coarse-grained titanium billet exhibits a heterogeneous structure with both nanostructured and coarser-grained regions. The foil produced from UFG billets has higher strength, higher ductility, and exhibits uniform deformation over a larger strain range at room temperature than foil produced from coarse-grained billets.
Zhu, Yuntian T. (Los Alamos, NM), Valiev, Ruslan Z. (Ufa, RU), Stolyarov, Vladimir V. (Ufa, RU), Kolobov, Yuri R. (Tomsk, RU), Grabovetskaya, Galina P. (Tomsk, RU), Girsova, Natalia V. (Tomsk, RU)
10/ 737,096
December 15, 2003
[0001] This invention was made with government support under Contract No. W-7405-ENG-36 awarded by the U.S. Department of Energy. The government has certain rights in the invention.