Friction stir welding (FSW) is today used as a premier solution for joining non-ferrous metals, although there are many limitations in its application. One of the objectives this study was to propose an innovative technique, namely ultrasonic-assisted friction (UAFSW) with longitudinal ultrasonic vibration applied stirring head. In paper, UAFSW mechanical properties and microstructure analysis ...

Ultrasonic welding is a method that has been applied for nonwoven fabrics, with many advantages such as fast speed, high reliability, easy automation and especially less pollution to the environment. This paper studies optimization of technological parameters in process time, pressure, weld shape on breaking strength ultrasonic Polypropylene (PP) nonwovens. To evaluate influence level find reas...

The present work seeks to determine the parameters for approval, through ultrasonic techniques, of spot welded joints of low carbon steel sheets. For such experience the mechanical behavior of a spotwelded joint was characterized under fatigue, in load cycles ranging from zero to 14 kN, on sheets of 1.5 mm thickness, joined by three spot welds of 7.5 mm of medium diameter, being the distance am...

Ultrasonic welding is a promising joining technique for thermoplastic composite parts. On the way towards upscaling and industrialisation of this technology, it crucial to understanding how affected by manufacturing tolerances. The objective research presented in paper was investigate influence that misaligned adherends have on static ultrasonic composites. Different angles were created changin...

Abstract This work investigates the application of ultrasonic vibration to steel joints formed by gas metal arc welding. Welding is done using a active welding source with current 120–160 A, 0.8-mm-diameter wire and 10 L/min CO2 flow. The distance from torch horn 120 mm. Ultrasonic most affects weld when position mm increases penetration speed 190 (275) mm/min for 5-mm-thick (10-mm-thick) plate...

We present a simulation technique of ultrasonic fields and echo signals, that uses a digitized crosssection photograph of a test object and a digitized cross-section figure of an ultrasonic probe as input data. The input data file is referred to as a shape file. In the shape file, different colors are assigned to different materials, for example, red for a piezoelectric transducer, green for th...

IMPORTANCE Conventional plating systems use titanium plates for fixation of fractures, with benefits of strength and biocompatibility. However, titanium plates require that screws be placed at a 90° angle to the pilot holes. In the midface, this becomes extremely difficult. Today, a variety of craniomaxillofacial osteosynthesis systems are available, including resorbable plating systems. Specif...

Abstract Inconel 690 has been extensively used in steam generator tubing materials for pressurized water reactors. In order to improve the weld quality of 690, ultrasonic-assisted pulsed tungsten inert gas (TIG) welding is studied. this study, macrostructure, microstructure, and mechanical properties weldments welded by TIG with without ultrasonic assistance were investigated. The microstructur...