Ultrasonic complex vibration welding of same and different metal specimens and structures of the welded area are studied using several complex vibration welding systems, scanning and transmission electron microscopes (SEM and TEM). Ultrasonic welding can weld various metal directly using vibration and static clamping pressure. The welding area is limited very narrow layer and can weld different...

Abstract In the present work different approaches to improve mechanical properties of a resistance spot welded 1200 MPa transformation induced plasticity-aided bainitic ferrite steel are evaluated. An extension welding time results in coarsening microstructure outer fusion zone and maximum force derived by cross tension strength test did not significantly. A temper pulse after long cooling lead...

Ill EXECUTIVE SUMMARY IV

The peel resistance of four adhesives (“J-B Weld” by J-B Weld (adhesive A) , 3M Scotch-Weld DP 125 Gray (adhesive B), Loctite PL Premium (3x) Construction Adhesive (adhesive C), and Henkel Hysol EA9394 (adhesive D)) is investigated for their bonding performance of a styreneethylene/butylene-styrene– carbon black (SEBS-CB) composite membrane used in structural health monitoring (SHM) application...

To satisfy the need of polymer connection in lightweight automobiles, a study on laser transmission spot welding using polymethyl methacrylate (PMMA) is conducted by using an Nd:YAG pulse laser. The influence of three variables, namely peak voltages, defocusing distances and the welding type (type I (pulse frequency and the duration is 25 Hz, 0.6 s) and type II (pulse frequency and the duration...

This research investigates the effect of SiC wt% on mechanical and microstructure behavior transformation induced plasticity (TRIP) 780 steels by resistance spot welding. The welded samples were characterized for their properties such as hardness, tensile shear, scanning electron microscope, X-ray diffraction, ductility ratio elongation. Results showed that width nugget was closely associated w...

Due to lack of comprehensive experimental studies on welding processes, and to better understand the mechanisms behind these processes, especially the weld pool shape variations suspected due to Marangoni Effect or surface tension shear stress, a two-dimensional simulation model was developed to study the physics of gas tungsten arc welding (GTAW). Experimental spot-welds on Ti-5Al-5Mo-5V-3Cr w...

The production of batteries often involves the joining multilayered foils to a conductive tab. In present study, solid state spot welding method, refill friction stir (refill FSSW), was employed for commercially pure aluminum (CP–Al) 2024-T3 Al alloy sheets (tab). Defect-free welds with high lap shear strength (LSS) are obtained. stirred zone (SZ), 2024 is only found within shoulder region, whi...