Feasibility of orbital friction stir welding on clad pipes of API X65 steel and Inconel 625

Research output: Journal contributionsJournal articlesResearchpeer-review


  • C. V. Amavisca
  • L. Bergmann
  • C. R.de L. Lessa
  • J. G. Schroeder
  • F. D. Ramos
  • G. V.B. Lemos
  • A. Reguly
  • B. Klusemann

Orbital friction stir welding (FSW) has been applied to clad pipes, which is certainly of interest to the oil and gas industry. In this context, an FSW system capable of performing sound joints in one pass with full tool penetration was developed. Orbital FSW was executed in 6 mm thick API X65 PSL2 steel clad pipes with 3 mm thick Inconel 625 using a polycrystalline cubic boron nitride (pcBN) tool. The metallurgical and mechanical properties of the joints were investigated. Sound joints with axial forces of 45–50 kN, tool rotational speeds of 400–500 rpm, and a welding speed of 2 mm/s were obtained, illustrating that the developed system can perform FSW joints without volumetric defects.

Original languageEnglish
Article number10669
JournalScientific Reports
Issue number1
Number of pages10
Publication statusPublished - 12.2023

Bibliographical note

This work was conducted during a scholarship supported by Leuphana Universität Lüneburg (Carla Volff Amavisca), which is gratefully acknowledged. Financial support from DAAD via funds of the Federal Ministry of Education and Research (BMBF) under project number 57598245 is gratefully acknowledged. Financed by Capes—Brazilian Federal Agency for Support and Evaluation of Graduate Education within the Ministry of Education of Brazil (Fabiano Dornelles Ramos) is gratefully acknowledged. We also would like to thank MSc. Camila Caroline Castro for her helpful support on acquiring the EBDS images for this work.

Funding Information:
“Open Access funding enabled and organized by Projekt DEAL. This publication was funded by the German Research Foundation (DFG).”

Publisher Copyright:
© 2023, The Author(s).

Publisher Copyright:
© 2023, The Author(s).