The influence of temperature, vibration time, amplitude, and other factors on the residual stress release effect was studied using method low-temperature heating high-frequency ultrasonic vibration, excellent control parameters were obtained. In addition, cutting weld reinforcement also studied. results demonstrate that highest relative rate 280.29%, average over 150 MPa, efficiency higher than...

Fatigue characteristics of welded joints alloy 01420C made by resistance spot welding and automatic argon arc are obtained. The highest durability was shown with a longitudinal weld. Joints Produced simulating the edge line reinforced element have comparable to an unloaded weld spot, which in turn is inferior joint elements limited cross-section repair mechanical cut similar standard sample for...

Ill EXECUTIVE SUMMARY IV

Friction stir welding (FSW) is a solution to overcome the problems of AA 6061 welding. When initial temperature T0 material increased during FSW process while parameters are kept constant then parameter value can be lowered. was varied by Troom temperature, 50 0C, 75 100 0C and 125 0C. The weld joint design form square butt joint. By using this approach higher T0, with being constant, produce p...

Uneven surface quality often occurs when manual grinding butt welds, so robot welding seam automation has become a fast-developing trend. Weld extraction and trajectory planning are important for automatic control of process. However, the research on weld is mostly focused pre-welding. Due to irregular shape after complex process, there seldom work that been devoted welding. Consequently, novel...

In this work, the effect of a filler wire feed rate was studied with special attention to proportion porosity volume in weld metal, microstructure, and mechanical properties. Butt laser joints were created using Nd:YAG laser. Weld produced AZ31 diameter 1.2 mm. Decreasing led an increase metal. Therefore, is more likely occur welding without use wire. Clear segregation aluminium, manganese, zin...

The thickness of steel plates used in the structure has gradually increased to meet load-bearing capacity requirements long-span bridges. Thick plate welded by arc welding process will result considerable residual stress with complex distribution. Large significantly impact performance At present; thick is not considered enough bridge engineering; which could lead potential dangers safety. In t...

Abstract The microstructure and properties of high nitrogen stainless steel welded joints under different flash currents were studied by butt welding. results show that, the welding parameters have obvious influence on joint structure mechanical properties. is organized into symmetrical distribution, grains obtained in interface area are small, mostly pearlite ferrite. With increase current, gr...