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Laser peening for reducing hydrogen embrittlement

United States Patent

May 25, 2010
View the Complete Patent at the US Patent & Trademark Office
Lawrence Livermore National Laboratory - Visit the Industrial Partnerships Office Website
A laser peening process for the densification of metal surfaces and sub-layers and for changing surface chemical activities provides retardation of the up-take and penetration of atoms and molecules, particularly Hydrogen, which improves the lifetime of such laser peened metals. Penetration of hydrogen into metals initiates an embrittlement that leaves the material susceptible to cracking.
Hackel; Lloyd A. (Livermore, CA), Zaleski; Tania M. (Livermore, CA), Chen; Hao-Lin (Lafayette, CA), Hill; Michael R. (Davis, CA), Liu; Kevin K. (Newark, CA)
Lawrence Livermore National Security, LLC (Livermore, CA), University of California (Davis, CA)
11/ 400,618
April 6, 2006
The United States Government has rights in this invention pursuant to Contract No. W-7405-ENG-48 between the United States Department of Energy and the University of California for the operation of Lawrence Livermore National Laboratory.