Research

Welding is the process of jointing metals permanently which holds our world together. That’s why it is necessary to determine the performance of weld joint. If done correctly a weld can withstand more load than the base metal itself. On the other hand, if it is not done correctly and tested properly, it can cause catastrophic failure causing damage of infrastructure and human life. So, it is necessary to test welded joint properly to test if there is any fault and if it fulfills the desired strength requirement.

In our tests we have tried to do just that. We did macroscopic and microscopic test of the welded joints to determine if there are any faults such as porosity, inclusions, brittle phase etc. Then we did hardness test to determine if the weld can withstand wear and tear of service conditions. We also did tensile test, guided bend test and nick brake test to determine the mechanical properties of the welded joint. Composition was also determined using OES to compare our sample’s properties with standard using UNS numbers. Standards were followed to draw the 3D and 2D picture of the sample and also to compare them. But the samples were not prepared according to standards accurately. Thus, we can see some discrepancies while comparing with the standards. Preparing the test coupons and testing it according to standards and more test points can improve the test results and hence safety of the welded joint.

See detail of the project at ResearchGate