Turbomachine component with surface repair

Abstract

A component according to the disclosure may include: a rotatable body having an aperture therein for receiving one of a turbomachine shaft or a lathe chuck, wherein the aperture is oriented substantially axially relative to an axis of rotation of the rotatable body; and a flange coupled to and in direct axial contact with the body, the flange including a surface that extends axially relative to the axis of rotation of the body, wherein the surface of the flange comprises a matingly engageable face configured to contact an axially aligned surface during operation of the component, the matingly engageable face having a burnishing indentation thereon, wherein a surface roughness of the surface of the flange is less than a surface roughness of a remainder of the flange, and wherein a compressive stress of the surface of the flange is greater than a compressive stress of the remainder of the component.

What is claimed is: 
     
         1 . A component comprising:
 a rotatable body having an aperture therein for receiving one of a turbomachine shaft or a lathe chuck, wherein the aperture is oriented substantially axially relative to an axis of rotation of the rotatable body; and   a flange coupled to and in direct axial contact with the body, the flange including a surface that extends axially relative to the axis of rotation of the body, wherein the surface of the flange comprises a matingly engageable face configured to contact an axially aligned surface during operation of the component, the matingly engageable face having a burnishing indentation thereon, wherein a surface roughness of the surface of the flange is less than a surface roughness of a remainder of the flange, and wherein a compressive stress of the surface of the flange is greater than a compressive stress of the remainder of the component.   
     
     
         2 . The component of  claim 1 , wherein the axial surface of the flange includes at least one of chromium (Cr), molybdenum (Mo), Nickel (Ni), and vanadium (V). 
     
     
         3 . The component of  claim 1 , wherein the rotatable body and the flange each comprise subcomponents of a turbine wheel. 
     
     
         4 . The component of  claim 1 , wherein the flange further includes an axial aperture substantially aligned with the aperture of the rotatable body, such that the aperture of the rotatable body and the aperture of the flange are structured to receive one of the turbomachine shaft or the lathe chuck. 
     
     
         5 . The component of  claim 4 , wherein the lathe chuck extends axially through the aperture of the rotatable body and the axial aperture of the flange. 
     
     
         6 . The component of  claim 5 , wherein the lathe chuck further includes a rotatable coupling configured to retain the rotatable body of the component thereon. 
     
     
         7 . The component of  claim 1 , wherein the flange is shaped to matingly engage an adjacent component mounted on the turbomachine shaft or the lathe chuck. 
     
     
         8 . The component of  claim 1 , wherein the surface of the flange is formed by a method including:
 rotating a target surface of the rotatable body about the first axis of rotation, the component being mounted on the lathe chuck oriented substantially along the first axis of rotation, wherein the target surface of the component includes an exposed axial target surface oriented axially relative to the first axis of rotation;   rotating a burnishing surface of a burnishing roller about a second axis of rotation, wherein the second axis of rotation is substantially perpendicular with the first axis of rotation; and   contacting the burnishing surface of the burnishing roller with the target surface of the component, during the rotating of the target surface and the rotating of the burnishing surface about the first axis of rotation, to yield the burnishing indentation.   
     
     
         9 . The component of  claim 8 , wherein the component is positioned in a turbomachine assembly without further modification to the target surface, following the contacting. 
     
     
         10 . The component of  claim 1 , wherein the burnishing indentation is shaped to induce metallic cohesion between the component and the axially aligned surface during contact therebetween. 
     
     
         11 . A turbomachine wheel comprising:
 a rotatable body mounted circumferentially on a turbomachine shaft, wherein the turbomachine shaft passes through an aperture of the rotatable body oriented substantially axially relative to an axis of rotation of the rotatable body with the turbomachine shaft, and wherein the rotatable body is configured to support a set of blade components; and   a flange coupled to and in direct axial contact with the rotatable body, the flange including:
 an aperture oriented substantially axially relative to the axis of rotation of the rotatable body, wherein the turbomachine shaft passes through the aperture of the flange; 
 a surface that extends axially relative to the axis of rotation of the rotatable body, and contacting an axially aligned surface during operation of the turbomachine wheel; and 
 at least one burnishing indentation formed within the surface of the flange, wherein a surface roughness of the flange along the at least one burnishing indentation is less than a surface roughness of a remainder of the turbomachine wheel, and wherein a compressive stress of the surface of the flange is greater than a compressive stress of the remainder of the flange. 
   
     
     
         12 . The turbomachine wheel of  claim 11 , wherein a material composition of the flange includes at least one of chromium (Cr), molybdenum (Mo), Nickel (Ni), or vanadium (V). 
     
     
         13 . The turbomachine wheel of  claim 11 , wherein the flange matingly engages an adjacent turbine wheel flange mounted on the turbomachine shaft. 
     
     
         14 . The turbomachine wheel of  claim 11 , wherein the at least one burnishing indentation of the flange is formed by a method including:
 rotating the surface of the rotatable body about the first axis of rotation, the flange being mounted on a lathe chuck oriented substantially along the first axis of rotation, wherein the surface of the component includes an exposed axial target surface oriented axially relative to the first axis of rotation;   rotating a burnishing surface of a burnishing roller about a second axis of rotation, wherein the second axis of rotation is substantially perpendicular with the first axis of rotation; and   contacting the burnishing surface of the burnishing roller with the surface of the flange, during the rotating of the surface and the rotating of the burnishing surface about the first axis of rotation, to yield the at least one burnishing indentation.   
     
     
         15 . The turbomachine wheel of  claim 11 , wherein a material composition of the flange is configured to induce metallic cohesion with the adjacent turbine wheel flange. 
     
     
         16 . A turbomachine comprising:
 a combustor;   a compressor section in fluid communication with the combustor;   a plurality of fuel nozzles in fluid communication with the combustor;   a turbine section in fluid communication with the combustor;   a shaft extending through each of the compressor section and the turbine section; and   a turbine wheel mounted on the shaft and configured to hold a plurality of blades thereon, the turbine wheel including:
 a rotatable body having an aperture oriented substantially axially relative to an axis of rotation of the rotatable body, such that the shaft passes through the aperture of the rotatable body, wherein the rotatable body is configured to support the plurality of blades; and 
 a first flange coupled to and in direct axial contact with the rotatable body, the first flange including:
 an aperture oriented substantially axially relative to the axis of rotation of the rotatable body, wherein the shaft passes through the aperture of the first flange; 
 a surface that extends axially relative to the axis of rotation of the rotatable body, and contacting an axially aligned surface during operation of the turbine wheel; and 
 at least one burnishing indentation formed within the surface of the first flange, wherein a surface roughness of the flange along the at least one burnishing indentation is less than a compressive stress of a remainder of the turbomachine wheel, and wherein a compressive stress of the surface of the flange is greater than a compressive stress of the remainder of the first flange. 
 
   
     
     
         17 . The turbomachine of  claim 16 , wherein a material composition of the first flange includes at least one of chromium (Cr), molybdenum (Mo), Nickel (Ni), or vanadium (V). 
     
     
         18 . The turbomachine of  claim 16 , wherein the at least one burnishing indentation of the first flange is formed by a method including:
 rotating the surface of the rotatable body about the first axis of rotation, the first flange being mounted on a lathe chuck oriented substantially along the first axis of rotation, wherein the surface of the component includes an exposed axial target surface oriented axially relative to the first axis of rotation;   rotating a burnishing surface of a burnishing roller about a second axis of rotation, wherein the second axis of rotation is substantially perpendicular with the first axis of rotation; and   contacting the burnishing surface of the burnishing roller with the surface of the first flange, during the rotating of the surface and the rotating of the burnishing surface about the first axis of rotation, to yield the at least one burnishing indentation.   
     
     
         19 . The turbomachine of  claim 18 , wherein the first flange is mounted on the shaft without further modification to the surface, following the contacting. 
     
     
         20 . The turbomachine of  claim 16 , wherein a material composition of the flange is configured to induce metallic cohesion with an adjacent turbine wheel flange.