Bobbin and conventional friction stir welding of thick extruded AA6005-T6 profiles
Journal article, 2016

Conventional and bobbin friction stir welding processes (FSW and BFSW, respectively) were employed for joining 10 mm thick extruded AA6005-T6 profiles. The FSW and BFSW techniques were employed using two sets of parameters resulting in slow and fast processes. In general, the bobbin tool enabled welding with faster welding speeds than the conventional FSW technique. A comprehensive in-situ thermal analysis was performed using thermocouples. It was evident that, in a like-for-like comparison, i.e., employing the same set of welding parameters, the BFSW technique introduces a somewhat higher peak temperature, however, lower heat input and, more importantly, a higher cooling rate than the conventional FSW. Accordingly, a somewhat finer microstructure was formed in the stir zone of the BFSW samples than in the FSW ones, resulting in higher hardness values, and slightly higher ultimate strengths in the BFSW samples.

Bobbin tool


Mechanical properties

Friction stir welding


Mohsen Esmaily

Chalmers, Chemistry and Chemical Engineering, Energy and Material

Nooshin Mortazavi Seyedeh

Chalmers, Physics, Materials Microstructure

W. Osikowicz

Sapa Technology

H. Hindsefelt

Sapa Technology

Jan-Erik Svensson

Chalmers, Chemistry and Chemical Engineering, Energy and Material

Mats Halvarsson

Chalmers, Physics, Materials Microstructure

J. Martin


Lars-Gunnar Johansson

Chalmers, Chemistry and Chemical Engineering, Energy and Material

Materials and Design

0264-1275 (ISSN) 1873-4197 (eISSN)

Vol. 108 114-125

Subject Categories

Materials Engineering



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2/4/2022 2