G.K. Padhy

TL;DR: Friction stir welding (FSW) has achieved remarkable success in the joining and processing of aluminium alloys and other softer structural alloys, however, it has not been entirely successful in the manufacturing of different desired materials essential to meet the sophisticated green globe requirements as discussed by the authors.

TL;DR: In this article, a systematic in-depth analysis of diversified aspects of ultrasonic application in metal joining and processing including its limitations, future prospects and assessments are classified and discussed, and detailed state-of-the art, experimentation and progresses of the ultrasonic vibrations and its applications in the above areas are comprehensively examined, evaluated and presented for exhaustive understandings of its physical mechanism.

TL;DR: In this article, material flow and plastic deformation in ultrasonic vibration enhanced friction stir welding are visualized by employing a special marker material and welding procedure, and three methods are developed to evaluate the volume of deformed material, the material flow velocity and the strain/strain rate.

TL;DR: In this paper, the main process variables were measured, characterized and compared in friction stir welding with/without ultrasonic vibration, and the ultrasonic vibrations improved weld formation by either reducing or eliminating the weld defects.

TL;DR: A preliminary investigation was carried out into the application of angularly exerted ultrasonic vibrations in friction stir welding for the joining of AA 6061-T4 alloy to AZ31B at different tool rotation speeds as mentioned in this paper.