Electrochemical grain refining of a metal

Details Electrochemical grain refining of a metal Electrochemical grain refining of a metal

C - Chemistry, Metallurgy

21

D

C21D 10/00 (2006.01)

Patent

CA 2497773

A method for surface and subsurface grain refining of a bulk hydrogen- absorbing metal includes the steps of cathodically charging the bulk hydrogen-absorbing metal with an electric current in the presence of a source of hydrogen to hydride the hydrogen-absorbing metal, and, changing polarity of the electric current to dehydride the hydrogen-absorbing metal. The method results in improvement to hardness and/or wear resistance of the metal, particularly titanium alloys such as Ti-6Al-4V. Metals treated with this method are particularly useful for medical implants and vehicle parts in which improved hardness and/or wear resistance is required.

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