Preprint Article Version 1 Preserved in Portico This version is not peer-reviewed

Numerical Study of the Cold Metal Transfer (CMT) Welding of Thin Austenitic Steel Plates with an Equivalent Heat Source Approach

Hichem ABERBACHE
* ORCID logo ,
Alexandre Mathieu
* ,
Nathan Haglon
,
Rodolphe Bolot
,
Laurent Bleurvacq
,
Axel Corolleur
,
Fabrice Laurent
Version 1 : Received: 28 November 2023 / Approved: 29 November 2023 / Online: 29 November 2023 (16:50:59 CET)

A peer-reviewed article of this Preprint also exists.

Aberbache, H.; Mathieu, A.; Haglon, N.; Bolot, R.; Bleurvacq, L.; Corolleur, A.; Laurent, F. Numerical Study of the Cold Metal Transfer (CMT) Welding of Thin Austenitic Steel Plates with an Equivalent Heat Source Approach. J. Manuf. Mater. Process. 2024, 8, 20. Aberbache, H.; Mathieu, A.; Haglon, N.; Bolot, R.; Bleurvacq, L.; Corolleur, A.; Laurent, F. Numerical Study of the Cold Metal Transfer (CMT) Welding of Thin Austenitic Steel Plates with an Equivalent Heat Source Approach. J. Manuf. Mater. Process. 2024, 8, 20.

Abstract

The CMT (Cold Metal Transfer) arc welding process is a convenient instrument for the assembly of thin sheets [1], [2]. More particularly, it permits the decrease of the amount of heat transferred to the parts to-be assembled, thus reducing their subsequent deformations. The present work aims at simulating the CMT welding of thin stainless-steel sheets in order to develop an approach that allows the prediction of temperature fields, as well as final deformations induced by the welding process. For that purpose, instrumented tests and numerical simulations were set aiming at comparing the experiments with simulations. Butt-welding of stainless-steel sheets was considered, with a thickness ranging from 1 to 1.2 mm. The weld seam samples were observed in order to set an equivalent heat source for each configuration. Moreover, the electric current and voltage were surveyed, and temperature measurements were performed using K-type thermocouples. In addition, displacement measurements were obtained using the DIC (Digital Image Correlation) technique. Thermomechanical simulations were then carried out using an equivalent heat source approach, considering the phase changes of elements, i.e. the transitions from solid to liquid and from liquid to solid. These simulations also consider the actual geometry of seams induced by addition of a filler material.

Keywords

CMT process; welding automation; sheet metal; austenitic stainless-steel; Numerical simulation

Subject

Engineering, Mechanical Engineering

Copyright: This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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