Turbomachine component with surface repair

A turbomachine comprising:

• a combustor;
• a compressor section 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 aperture extends axially through the first flange and the shaft passes through the aperture of the first flange, and the aperture of the first flange and the aperture of the rotatable body have a substantially same diameter;
• a surface that faces 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 sanding indentation formed within the surface of the first flange, wherein a surface roughness of the first flange along the at least one sanding indentation is less than a surface roughness of a remainder of the turbine wheel, and wherein a specific surface area of the surface of the first flange along the at least one sanding indentation is greater than a specific surface area of the remainder of the turbine wheel, wherein each indentation is shaped in the form of an affected regional burnishing pattern, wherein each of the at least one sanding indentation is only located on the axially facing surface of the first flange, and wherein a frictional coefficient of the first flange along the at least one sanding indentation is greater than a frictional coefficient of a remaining surface area of the first flange;
• and
• a second turbine wheel mounted on the shaft, the second turbine wheel including:
• a second rotatable body having an aperture oriented substantially axially relative to an axis of rotation of the second rotatable body, such that the shaft passes through the aperture of the second rotatable body;
• and
• a second flange coupled to and in direct axial contact with the second rotatable body and matingly engaging the first flange, the second flange including:
• an aperture oriented substantially axially relative to the axis of rotation of the second rotatable body, and the shaft passes through the aperture of the second flange,
• wherein the aperture of the second flange and the aperture of the second rotatable body have a substantially same diameter;
• an axially facing surface that faces axially relative to the axis of rotation of the second rotatable body;
• and
• at least one sanding indentation formed within the surface of the second flange, wherein a surface roughness of the second flange along the at least one sanding indentation of the second flange is less than a surface roughness of a remainder of the second turbine wheel, the at least one sanding indentation of the second flange in contact with the at least one sanding indentation of the first flange,
• wherein the first flange and the second flange have a same material composition that includes at least one of chromium (Cr), molybdenum (Mo), Nickel (Ni), or vanadium (V).