Preparation of an article surface having a surface compressive texture
AssigneeGeneral Electric Company
InventorsAlberto Luna, Jeffrey F. Wessels, Dale R. Lombardo
Life of this patent
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Abstract
A method for preparing a surface includes providing an article having an article surface, thereafter first processing the article surface to establish a first residual compressive stress state and a first surface roughness in the article surface, and thereafter second processing the article surface by surface compressive texturing to establish a second residual compressive stress state and a second surface roughness in the article surface. The second surface roughness is quantitatively less than the first surface roughness, and substantially no material is removed from the article surface in the step of second processing.
Claims13
A method for preparing a surface, comprising the steps of
- providing an article having an article surface;
- thereafter
- first processing the article surface to establish a first residual compressive stress state and a first surface roughness in the article surface;
- and thereafter
- second processing the article surface by surface compressive texturing to establish a second residual compressive stress state and a second surface roughness in the article surface, wherein the second surface roughness is quantitatively less than the first surface roughness, wherein substantially no material is removed from the article surface in the step of second processing, and wherein the second processing is different from the first processing,
- wherein the step of second processing the article surface includes establishing a selected directionally oriented surface texture pattern of surface asperities in the article surface, wherein the directionally oriented surface texture pattern of surface asperities are aligned generally parallel with the direction of gas flow impinging upon the article surface when the article is in service.
A method for preparing a surface, comprising the steps of
- providing an article having an article surface that is contacted by a directionally oriented gas flow when the article is in service to define a gas flow impingement direction on the article surface;
- thereafter
- peening the article surface to establish a first residual compressive stress state and a first surface roughness in the article surface;
- and thereafter
- burnishing the article surface by surface compressive texturing to establish a second residual compressive stress state and a second surface roughness in the article surface, wherein the second surface roughness is quantitatively less than the first surface roughness, and wherein substantially no material is removed from the article surface in the step of burnishing,
- wherein the step of burnishing includes the step of establishing a directionally oriented surface texture pattern of surface asperities in the article surface, wherein the directionally oriented surface texture pattern of surface asperities are aligned generally parallel with the direction of gas flow impinging upon the article surface when the article is in service.
Dependencies are inferred from the claim text.