Repair procedure for a gas turbine engine via variable polarity welding

Abstract

A liner panel for a gas turbine engine includes a cold side having a backside feature and a hot side with a variable polarity weld.

What is claimed is: 
     
         1 . A liner panel for use in a combustor of a gas turbine engine comprising:
 a cold side having a backside feature; and   a hot side with a variable polarity weld.   
     
     
         2 . The liner panel as recited in  claim 1 , wherein said hot side includes a thermal barrier coating. 
     
     
         3 . The liner panel as recited in  claim 2 , wherein said thermal barrier coating is a nickel-aluminide. 
     
     
         4 . The liner panel as recited in  claim 2 , wherein said thermal barrier coating is an aluminum oxide. 
     
     
         5 . The liner panel as recited in  claim 1 , wherein said cold side includes a coating. 
     
     
         6 . The liner panel as recited in  claim 5 , wherein said coating is a diffusion-aluminide. 
     
     
         7 . A method of repairing a component of a gas turbine engine comprising:
 welding a damaged area via variable polarity welding.   
     
     
         8 . The method as recited in  claim 7 , further comprising:
 stripping a thermal barrier coating prior to the welding.   
     
     
         9 . The method as recited in  claim 8 , further comprising:
 applying a thermal barrier coating after the welding.   
     
     
         10 . The method as recited in  claim 7 , further comprising:
 acid stripping a thermal barrier coating prior to the welding.   
     
     
         11 . The method as recited in  claim 7 , further comprising:
 stripping a thermal barrier coating in the damaged area prior to the welding.   
     
     
         12 . The method as recited in  claim 11 , further comprising:
 applying a thermal barrier coating in the damaged area after the welding.   
     
     
         13 . A liner panel for use in a combustor of a gas turbine engine comprising:
 a cold side having a coating; and   a hot side with a variable polarity weld.   
     
     
         14 . The liner panel as recited in  claim 13 , wherein said hot side includes a thermal barrier coating. 
     
     
         15 . The liner panel as recited in  claim 14 , wherein said thermal barrier coating is a nickel-aluminide. 
     
     
         16 . The liner panel as recited in  claim 13 , wherein said cold side includes a coating. 
     
     
         17 . The liner panel as recited in  claim 16 , wherein said coating is a diffusion-aluminide.