Homopolar Pulsed Welding: Interface Properties of High Strength Steel Pipe, a Technical Note
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This note discusses the microstructure, hardness, and toughness of a homopolar weld (HPW) performed on API 5L grade X-52 line pipe (90 mm diameter and 10 mm wall thickness). Homopolar welding is a solid state welding process made possible by a large pulse of direct current from a homopolar generator (HPG) The heat generated by electrical resistance leads to complex phase transformations resulting in different structures with different characteristics. The results show the weld properties are affected by the pipe materials and that HPW is a promising process for joining high strength steel pipe.