Vibration-assisted friction stir welding of AA 2024-T3 plates

Ibrahim Sabry, Abdel Hamid I. Mourad, Dinu Thomas Thekkuden

Research output: Chapter in Book/Report/Conference proceedingConference contribution

5 Citations (Scopus)

Abstract

In this research, the weldability of AA 2024-T3 plates using vibration-assisted friction stir welding (VaFSW) is primarily inspected. The vibration imparted to the fixture holding the specimens in VaFSW differentiates this state-of-art process from the conventional friction stir welding (FSW) technique. For large-scale welding applications, it is ideal to vibrate the tool with the required amplitude and frequency for optimum performance. Due to limitation in applying vibration to the tool in a milling machine, the vibration is imparted to a customdesigned fixture and rig setup. The fixture, which holds the plates rigidly, is mechanically shaken during the friction stir welding process to boost the material strain in the weld region. The VaFSW is performed with 1800 rpm tool rotational speed, 16 mm/min travel speed and at four intermittent levels of vibrational frequencies (10.11 Hz, 13.56 Hz, 16.67 Hz, 25.17 Hz). The welding morphology and mechanical characteristics of joints produced using VaFSW and FSW are presented in the current work. Finally, the results of VaFSW are compared with conventional FSW. Results show that the tensile strength and, hardness in each of the zones-Nugget zone, heat affected zone, and base metal increased with the increase in the vibrational frequency in the vibration-assisted friction stir welding process. In addition, the ductility of the joints increased by the vibration in the vibration-assisted friction stir welding process due to excessive plasticized material resulting in a greater grain dislocation. Moreover, the mechanical characteristics of weld joints enhanced with the increase in the vibrational frequency. However, the tensile strength and hardness of conventional FSWed joint are slightly higher than the joint produced using VaFSW at 10.11 Hz. This study is promising for finding the capability of VaFSW over FSW to produce quality weld joints.

Original languageEnglish
Title of host publicationMaterials and Fabrication
PublisherAmerican Society of Mechanical Engineers (ASME)
ISBN (Electronic)9780791885345
DOIs
Publication statusPublished - 2021
EventASME 2021 Pressure Vessels and Piping Conference, PVP 2021 - Virtual, Online
Duration: Jul 13 2021Jul 15 2021

Publication series

NameAmerican Society of Mechanical Engineers, Pressure Vessels and Piping Division (Publication) PVP
Volume4
ISSN (Print)0277-027X

Conference

ConferenceASME 2021 Pressure Vessels and Piping Conference, PVP 2021
CityVirtual, Online
Period7/13/217/15/21

Keywords

  • Aluminum 2024 alloy
  • Amplitude
  • Frequency
  • Friction stir welding
  • Vibration
  • Vibration-assisted friction stir welding

ASJC Scopus subject areas

  • Mechanical Engineering

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