Manufacturing Industry
Arc welding developed for repair of DS structures.
Advanced Materials & Processes, November, 2001
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An arc-welding technique for repair of a directionally solidified (DS) nickel-base superalloy part such as a turbine blade or vane has reportedly been developed at the NASA Glenn Research Center, Cleveland, Ohio. The technique may be applied to an as-cast component or an inservice part that has been damaged.
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Unlike ordinary gas tungsten arc welding, this method results in a predominantly DS microstructure in the repaired region, similar to that of the casting. The weld filler material is the same as that of the DS casting, preventing the ...
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