1
Daniel S Gnanamuthu, Edward V Locke: Surface modification. Avco Everett Research Laboratory, Charles M Hogan, Melvin E Frederick, March 29, 1977: US04015100 (91 worldwide citation)

Properties of a surface layer of a metal part are modified by changing its composition and microstructure using focused radiant energy. Minor components of an alloy having the metal of the substrate as the major component thereof are applied to the surface and a limited depth surface layer of the su ...


2
Daniel S Gnanamuthu: Cladding. Avco Everett Research Laboratory, Charles M Hogan, Melvin E Frederick, April 20, 1976: US03952180 (41 worldwide citation)

A metal layer is clad to a metal substrate by laying spaced rods or wires of a cladding metal on the substrate surface and scanning the cladding metal with a continuously operating laser beam, part of which impinges directly on the cladding metal to melt it and part of which impinges on the adjacent ...


3
Daniel S Gnanamuthu: Metal surface modification. Avco Everett Research Laboratory, M E Frederick, Jerry Cohen, August 30, 1983: US04401726 (24 worldwide citation)

Properties of the surface of low melting substrate parts including low melting, high conductivity reactive metal parts, are modified by forming an alloy casing thereon having the metal of the substrate as a first (matrix) component thereof together with a higher melting material as the second (reinf ...


4
Daniel S Gnanamuthu, Ralph J Moores, Neil E Paton, Richard F Vyhna: Non-contact scribing process for organic maskants on metals or alloys thereof. Rockwell International Corporation, Charles T Silberberg, Max Geldin, December 29, 1987: US04716270 (23 worldwide citation)

A method is disclosed for scribing chemical milling maskant applied to a metal substrate by impinging a laser beam on the maskant and controlling the beam to penetrate through the maskant substantially without damaging the underlying metal. In carrying out the process, a metal part such as aluminum, ...


5
Ralph J Moores, Daniel S Gnanamuthu: Method of laser welding. Rockwell International Corporation, John J Deinken, February 5, 1991: US04990741 (22 worldwide citation)

First and second metallic components are joined along a weld path by providing a beam of coherent electromagnetic energy having sufficient power to melt the first and second components and providing a low turbulent flow of an inert shielding gas over a weld region along a portion of the weld path. T ...


6
Daniel S Gnanamuthu: Cladding. Avco Everett Research Laboratory, M E Frederick, Jerry Cohen, Charles Hieken, October 24, 1978: USRE029815

A metal layer is clad to a metal substrate by laying spaced rods or wires of a cladding metal on the substrate surface and scanning the cladding metal with a continuously operating laser beam, part of which impinges directly on the cladding metal to melt it and part of which impinges on the adjacent ...