Accessible Unlicensed Requires Authentication Published by De Gruyter November 16, 2021

Morphology and Tensile Properties as a Function of Welding Current in Thermoplastic Induction Welds

W. P. Ma, H. C. Bu, F. Y. Wang, H. Y. Yang, Y. Xu and X. H. Zhan


Compared to other conventional joining methods, induction welding offers the superiority of avoiding mechanical degradation and satisfying the need for weight reduction in the aircraft industry. In this paper, a metal mesh was adapted as an induction component in the induction welding of polyetheretherketone (PEEK) with various currents. The effect of welding current on the microstructure and mechanical properties of the induction welding joint was further investigated. The results indicate that induction welding joints with the narrow thickness of the fusion zone and high tensile strength can be attained in the welding current range of 7.05 A to 11.05 A. However, when the current exceeds 13.91 A, the excessive heat input leads to the unsteady flow of PEEK or even thermal oxidative degradation and thermal decomposition, which increases the thickness of the fusion zone and reduces the tensile strength of the joint. In addition, the principal fracture mode presents cohesive failure, thereby promoting the tensile strength of the joint.

Xiaohong Zhan, College of Materials Science and Technology, Nanjing University of Aeronautics and Astronautics, Nanjing 211106, PRC


This work was supported by the open subject of the National key laboratory of advanced composites.


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Received: 2020-08-10
Accepted: 2021-03-19
Published Online: 2021-11-16

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