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US 5,492,447 AGranted
Laser shock peened rotor components for turbomachinery
AssigneeGeneral Electric Company
InventorsSeetharamaiah Mannava, Albert E. McDaniel, William D. Cowie
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Abstract
Turbomachinery rotor components having a metallic body with at least a portion of the body subject to a tensile stress field due to centrifugal and thermal growth induced forces generated by the rotor when the rotor is rotating, at least one stress riser in the stress field portion that causes stress concentration when the rotor is rotating, and at least one region of the component around the stress riser having deep compressive residual stresses imparted by laser shock peening (LSP).
Claims7
A component of a gas turbine engine rotor, said component comprising:
- a metallic body having at least a portion of said body subject to a stress field due to forces generated by the engine's operation,
- at least one stress riser in the form of a hole, located in said portion that causes stress concentration in said stress field when the rotor is rotating,
- at least one region of said component around said stress riser having deep compressive residual stresses imparted by laser shock peening (LSP),
- first and second ones of said region forming first and second regions extending inward into said body from corresponding generally opposite axially facing laser shock peened first and second circular surfaces on said body,
- each of said first and second circular surfaces and said first and second regions encompass each of first and second ends of said hole, and
- an interior annular one of said region extending into said body from a laser shock peened interior annular surface of said hole.
3 more elements
Dependencies are inferred from the claim text.