Fluid reaction surfaces (i.e. – impellers) – Specific blade structure – Coating – specific composition or characteristic
Reexamination Certificate
2011-05-17
2011-05-17
Look, Edward (Department: 3745)
Fluid reaction surfaces (i.e., impellers)
Specific blade structure
Coating, specific composition or characteristic
C148S421000, C148S565000
Reexamination Certificate
active
07942641
ABSTRACT:
A method for simultaneously laser shock peening opposite laser shock peening surfaces on opposite sides of an article, such as a gas turbine engine airfoil, with varying thickness using oppositely aimed laser beams and varying surface fluence of the laser beams over the laser shock peening surfaces as a function of the thickness of the article beneath each one of a plurality of laser shock peened spots formed by the beams on the surfaces. The fluence may be equal to the thickness multiplied by a volumetric fluence factor, the volumetric fluence factor being held constant over the laser shock peening surface. The volumetric fluence factor may be in a range of about 1200 J/cm3to 1800 J/cm3and more particularly about 1500 J/cm3. Laser beam energy may be varied with a computer program controlling firing of the laser beam.
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Bailey Mark Samuel
Hausfeld Michael Paul
Rockstroh Todd Jay
Williams, Jr. Donald Eugene
Andes William Scott
General Electric Company
Look Edward
Rosen Steven J.
White Dwayne J
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