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Ultrafine-grained titanium for medical implants

United States Patent

June 4, 2002
View the Complete Patent at the US Patent & Trademark Office
Los Alamos National Laboratory - Visit the Technology Transfer Division Website
We disclose ultrafine-grained titanium. A coarse-grained titanium billet is subjected to multiple extrusions through a preheated equal channel angular extrusion (ECAE) die, with billet rotation between subsequent extrusions. The resulting billet is cold processed by cold rolling and/or cold extrusion, with optional annealing. The resulting ultrafine-grained titanium has greatly improved mechanical properties and is used to make medical implants.
Zhu; Yuntian T. (Los Alamos, NM), Lowe; Terry C. (Santa Fe, NM), Valiev; Ruslan Z. (Ufa, RU), Stolyarov; Vladimir V. (Ufa, RU), Latysh; Vladimir V. (Ufa, RU), Raab; Georgy J. (Ufa, RU)
The Regents of the University of California (Los Alamos, NM)
09/ 536,592
March 28, 2000
FIELD OF THE INVENTION The present invention relates generally to ultrafine-grained titanium and, more particularly, to medical implants and other devices made with ultrafine-grained titanium. This invention was made with government support under Contract No. W-7405-ENG-36 awarded by the U.S. Department of Energy to The Regents to the University of California. The U. S. Government has certain rights in the invention.