A workpiece for use with a flash producing welding process comprises a revolute body, a plurality of first attachment portions, a plurality of second attachment portions. The revolute body has an axis of rotation.Each of the first attachment portions has a first radially outer weld joint surface, and each of the second attachment portions has a second radially outer weld joint surface. The revolute body comprises a plurality of first and second stub portions, with each of the first stub portions having a first radially inner weld joint surface, and each of the second stub portions having a second radially inner weld joint surface.