Effects of Weld Heat Input on Mechanical Characteristics of Low Carbon Sheet Steels

Authors

  • Sait Ozmen ERUSLU Tekirdag Namik Kemal University, Corlu Engineering Faculty, Mechanical Engineering Department
  • Ismail Berk AKBULUT Tekirdağ Namık Kemal University
  • Ibrahim Savas DALMIS Namik Kemal University Corlu Engineering Faculty Department of Mechanical Engineering Division of Design and Manufacturing 59860 Corlu-Tekirdag / Turkey Phone :+90 282 250 23 45 Mobile:+90 532 514 83 45 Fax :+90 282 652 93 52 +90 282 250 99 24 E-mail: idalmis@nku.edu.tr https://orcid.org/0000-0002-4401-9155

DOI:

https://doi.org/10.5755/j02.mech.34356

Keywords:

TIG welding, welding heat input, finite element analysis, Gauss heat flux approach

Abstract

This study focuses on examining the variation in mechanical characteristics of low-carbon sheet steels when they are subjected to heat input from Tungsten Inert Gas (TIG) welding. The weld heat input parameters, such as welding speed and current, were controlled through the TIG welding process. A finite element analysis was performed to evaluate the couple field thermomechanical effects of the weld heat line, using the Gauss heat flux approach for thermal heat variation across the weld heat-affected zone. The numerical study yielded results for weld heat-affected deflection, residual stress, and modal analysis through the finite element model. It was found that the ductility decreased and hardness increased in the fusion zone, as a function of weld current and speed. The residual stresses and their zone of influence, as determined by weld line parameters, were found to be key factors affecting deflection and natural frequencies in structural aspects of low carbon sheet steels.

Author Biography

Ibrahim Savas DALMIS, Namik Kemal University Corlu Engineering Faculty Department of Mechanical Engineering Division of Design and Manufacturing 59860 Corlu-Tekirdag / Turkey Phone :+90 282 250 23 45 Mobile:+90 532 514 83 45 Fax :+90 282 652 93 52 +90 282 250 99 24 E-mail: idalmis@nku.edu.tr

Assoc. Prof. Dr. Namik Kemal University Corlu Engineering Faculty Department of Mechanical Engineering Division of Design and Manufacturing

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Published

2024-04-23

Issue

Vol. 30 No. 2 (2024)

Section

MECHANICAL TECHNOLOGIES