Evaluation and Repair of Wrought Iron and - Purdue e-Pubs ...

43The sections of the eyebars where labeled on either side and then cut directly into half.These halves were then beveled and joined together using the shielded metal arc weldingprocess.The joint used for these groove welded specimens was a double V butt joint witha sixty degree incline and a one sixteenth inch land. Figure 3.11 is a detail of theconnection used for welding the specimen. Weld passes were alternated on either side toensure that heat distortion in the piece was minimized.After the initial root pass was completed, the surface of the weld pass was cleanedwith a chisel hammer and wire brush and then back ground on the opposite side wherethe second weld pass was to be placed. This was to ensure the second weld pass fullypenetrated the wrought iron and the initial pass. Figure 3.12 is a photograph of thewelded connection after the initial root pass had been deposited and ground back to theweld metal. After the second weld pass, the specimen was again cleaned with a chiselhammer and wire brush and the piece was turned over and slightly back ground for thefollowing pass. This process continued until the final weld passes were above the surfaceof the specimen on either side. A more detailed description of the welding procedureutilized for this testing is provided in Appendix D.Once the joint was completely welded, the surface of the piece was then groundflush so the piece was completely flat. From this smooth piece the tensile couponspecimen was then cut out of the center of the piece. Cutting the specimen out of thecenter of the piece helped to ensure that only an adequate weld would be tested. This isbecause the ending and starting points of the weld, which usually include impurities andair pockets, were removed during machining. To evaluate the effect of weld metal onthe wrought iron, two different weld metals, E6010 and E7018 SMAW, were used toweld different specimens together.