Making of Resin Specimens Contained with Welding Discontinuites to use for Visual Testing Training
Inspection in metal joining is a very important process. Nondestructive testing namely Visual Testing (VT) is one
of the most often uses to approve the joining product. This research shows the procedure to simply make the VT training
specimens which contain various types of weld discontinuities. The benefit is to achieve the identical VT training workpiece
and save cost. The first step is to make a steel prototype specimen which is included of seventypes of the welding
discontinuity which are crack, undercut, porosity, excessive reinforcement, incomplete penetration, root concavity and
excessive root penetration. In addition the discontinuity sizes are designed to relate to the criteria of the reject and accept of
various well-known codes and standards in order to proper for understanding of the decision making under various code and
standard criteria. After that the metal prototype is used as a master pattern to make a silicone mold. Furthermore the silicone
mold were used to cast the resin specimen. Two types of resin PC600 resin and Epoxy resin 500AB were selected to
compare their physical and mechanical properties. It was found that the epoxy resin 500AB is more appropriate than PC 600
due to its non-shrink and very low distortion. The Advantage of the resin specimen is not only cheap and identical but also
no rust and light weight.
Index Terms - Visual testing, Non-destructive testing, Resin workpiece.