Friction Stir Spot Welding Phenomena in Al Alloy 6061

Yutaka S. Sato; Mitsuo Fujimoto; Natsumi Abe; Hiroyuki Kokawa

doi:10.4028/www.scientific.net/MSF.638-642.1243

Paper Titles

Mechanical and Microstructural Characterisation of Dissimilar Friction Stir Welded AA2024-T3 and AA7075-T6 Aluminium Alloys
p.1221

Spot Welding between Aluminum Alloy and Steel by Friction Stirring
p.1227

Study and Researches about the Microhardness’s Variation of a Special S.G. Cast Iron
p.1233

Novel Approaches to Friction Spot Welding Thin Aluminium Automotive Sheet
p.1237

Friction Stir Spot Welding Phenomena in Al Alloy 6061
p.1243

Formability of Friction Stir Welded AZ31 Magnesium Alloy Sheets
p.1249

Quantifying the Usability of a Robot System for Friction Stir Welding
p.1255

Effects of Tool Design and Friction Stir Welding Parameters on Weld Morphology in Aluminum Alloys
p.1261

Development of Local Reinforcement and Local Metallic Foam Using FSP
p.1267

HomeMaterials Science ForumMaterials Science Forum Vols. 638-642Friction Stir Spot Welding Phenomena in Al Alloy...

Friction Stir Spot Welding Phenomena in Al Alloy 6061

Abstract:

Friction stir spot welding (FSSW), developed based on principle of friction stir welding, has been paid attention as a new solid-state spot welding process. Since FSSW can produce high-quality weld in Al alloys more easily than resistance spot welding, this process has been already used for construction of Al components in the automotive industries. Despite the large industrial interests in FSSW, fundamental knowledge on welding phenomena of this process has not been fully understood. In this study, FSSW phenomena, such as the consolidation mechanism, the microstructural evolution and the material flow, were examined in Al alloy 6061. This study clarified that the elliptical zone found in the vicinity of the pin hole on the cross section was characterized by the initially lapped surface of two sheets. Moreover, the following material flow was proposed; capture of the upper material with the threads on the pin surface, spiral flow along the tool rotation, and then release at the tip of the pin.

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Periodical:

Materials Science Forum (Volumes 638-642)

Pages:

1243-1248

DOI:

https://doi.org/10.4028/www.scientific.net/MSF.638-642.1243

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Online since:

January 2010

Authors:

Yutaka S. Sato, Mitsuo Fujimoto, Natsumi Abe, Hiroyuki Kokawa

Keywords:

Aluminium Alloy, Friction Stir Spot Welding, Material Flow, Microstructure

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