Characterisation of periodic variation in torque occurred in friction stir welding process. (May 2014)

• Record Type: Journal Article
• Authors: Xiong, J. T.; Zhang, X. C.; Li, P.; Qian, J. W.; Li, J. L.; Zhang, F. S.; Dong, H. B.
• Is Part Of: Science and technology of welding & joining. Volume 19:Number 4(2014:May)
• Page Start: 350
• Page End: 354
• Publication Date: 2014-05
• Subjects: Welding -- Periodicals; Joints (Engineering) -- Periodicals; Surfaces (Technology) -- Periodicals; 671.52
• DOI: 10.1179/1362171814Y.0000000195
• Languages: English
• ISSNs: 1743-2936

Abstract

<abstract> <title> <x content-type="archive" xml:space="preserve">Abstract</x> </title> <sec> <p>Friction stir welding was physically simulated to study torque variation by a rotational friction process under constant axial pressing speed. The results indicated that the torque accurately reproduce the same periodic characteristics as the friction stir welding torque, i.e. the torque cycle is equal to the time of one tool rotation. The periodic variation intensity of torque, which was obtained at a constant rotational speed ω and a constant axial pressing speed <italic>v</italic>, was characterised by non-dimensional amplitude of the torque <italic>Γ*</italic>. Moreover, a semianalytical model, which describes Γ* as a function of <italic>ω</italic>²<italic>/v</italic> in Arrhenius form, was established. In this model, <italic>Γ*</italic> exponentially increases with ω²/<italic>v</italic>, and low ω²/<italic>v</italic> suppresses the variation intensity of torque.</p> </sec> </abstract>