Method for Redistributing Residual Stress in an Engine Component
AssigneeGeneral Electric Company
InventorsRobert Allen Hagan, James William Culley, Joan Elizabeth Bissett, Rebecca Dawn Finlay, Donald Charles Slavik
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Abstract
A method for redistributing an area of residual stress around a machined central aperture in an engine component. The method includes changing tensile stress to compressive stress at an area circumscribing the machined aperture. The method can be applied to, for example, a forged engine component such as a rotating disk or an impeller part for a gas turbine engine.
Claims26
A method for redistributing a residual stress about a central aperture of a pre-machined engine component, the method comprising changing tensile stress to compressive stress in the pre-machined engine component by applying cold expansion to the central aperture of the pre-machined engine component.
A method for redistributing an area of residual stress in a forged rotating disk prior to completing a final machining, the method comprising changing tensile stress to compressive stress in the forged impeller by applying cold expansion to the center of the forged rotating disk.
Dependencies are inferred from the claim text.