The Effects of Undercut Depth and Length on Weldment Mechanical Properties

Undercutting is a fusion welding defect that appears as groove at the weld metal's toe. An undercut discontinuity forms when welding, particularly current applied an extremely rapid rate. It decreases static and fatigue strength of produces stress concentration zone. The height reinforcement, bead's contact angle, undercut's breadth, depth, length, root radius, well other factors, affect factor's size. In this study, two mild steel plates with 20 mm thickness were welded together using gas metal arc welding. Each test plate was machined to have 30° single bevel angle prior butt underwent radiographic NDT testing. A weldment free created. into typical specimens for tensile strength. simulated by drilling through each sample. Grooves had different depths lengths. After that, samples put test. findings allowed identification impacts shape on strength, ductility, factor.