On one of the t section it was cut on a diagonal the

This preview shows page 15 - 21 out of 28 pages.

Possibly, it is caused by the welding. On one of the T-Section, it was cut on a diagonal. The two T-Sections are not cut evenly. One of the plates is bigger than the other. On the flat size of the specimen, there are four longitudinal butt welds. These welds are not structural. On one of the corner, you can see the effects from the weld on the other side.
15 Specimen #9 oLength of the Longitudinal Butt/Fillet Weld = 4.625 inches Specimen #9 is a T-Section connected by two different aluminum plates. There are continuous longitudinal fillet welds on both sides of the T-Section. On both of the fillet welds, there are no huge lumps. It looks like the lumps were pressed down. There is a burn through on one side of the base metal. It is on the middle of cross-section. It looks like the metal was burned because of the welding. It is possible the welding was done too long in that area. On the back side of the plate, there is discoloration. There are some parts where it is dark gray, and some areas are light gray. On the edge of the plate, it was not cut evenly. There is a small lump which is possibly caused by weld.
16 Specimen #10 Length of the Longitudinal Butt/Fillet Weld = 8.250 inches Specimen #10 is a segment of a rail line. These rail lines are connected on the field. After it is welded, it is then grinded. It is heavy and was part of a rail line. It is two segments of rail connected by butt weld. The welding is done on-site. After welding, the welding area is grinded. You can tell because the lumps caused by the weld are flattened. The area that is weld has a darker color than the remaining parts of the rail.
17 MAGNETIC TESTING Specimen #1 The Iron Powder is poured on top of the areas that were welded. For Specimen #1, there was a fillet weld and butt weld. After the Iron Powder is poured on the specimen, the Contour Probe is put on top of the specimen. Afterwards, the Contour Probe is turned on. The Contour Probe applies continuous fields to produce magnetic field to detect cracks in Specimen #1. Based on the test, the Iron Powder follows the line where the pipe was fillet welded to the flat plate. Also, the Iron Powder is on the line where the butt weld was done to connect two smaller flat plates.
18 Specimen #5 The Iron Powder is poured on top of the butt weld areas. For Specimen #5, there was a butt weld on both sides of the bent area. Afterwards, the Contour Probe is placed on top of the specimen, and turned on. The Contour Probe applies an electric field to identify subsurface cracks in Specimen #5. The scattered Iron Powder migrates towards potential cracks which is near the butt welds.
19 Specimen #10 The Iron Powder is poured on top of the butt weld areas. The butt welds are on both sides of Specimen #10. The welds are on the middle where the rails meet. After the Iron Powder is scattered around the butt welds, the Contour Probe is used to find where the potential cracks are located. The Contour Probe applies an electric field to identify subsurface cracks in Specimen

  • Left Quote Icon

    Student Picture

  • Left Quote Icon

    Student Picture

  • Left Quote Icon

    Student Picture