The Influence of Heat Input on the Formation of Fatigue Cracks for High-Strength Steels Resistant to Low Temperatures

Welding is one of the most widely used metal joining techniques. However, improper technique and handling may lead to weld defects. Cracks that occur during exploitation welded joints in places increased stress concentration are called fatigue cracks. In our previous study, we suggested lowering zone face prevent surface cracks butt-welded joints. Here, further examined how welding heat input external factors can be controlled minimize occurrence on The analyzed this study occurred a consequence at toe weld. We performed twenty-four experiments comprising following four conditions: torch angle, number cover passes, length electrode stick-out, shielding gas (two environments were used). Stress determined via experimental data. results higher associated with lower risk developing Thus, concluded could minimized by increasing arc voltage current while also reducing speed.