Characterization of Dissimilar Materials Joining using Gas Metal Arc Welding

Authors

  • Khairunnisa Abu Khair School of Mechanical Engineering, Faculty of Engineering Universiti Teknologi Malaysia, 81310 UTM Johor Bahru, Johor
  • Norizah Hj Redzuan School of Mechanical Engineering, Faculty of Engineering Universiti Teknologi Malaysia, 81310 UTM Johor Bahru, Johor

Keywords:

Gas metal arc welding, dissimilar materials joining, galvanized steel, mild steel

Abstract

Galvanized steel (GS) and mild steel (MS) were joined using the gas metal arc welding
(GMAW) method with steel filler rod and carbon dioxide as the shielding gas. The welding
process was carried out considering a range of the welding voltages (and currents) that
was gradually varied from 16 V to 18.5 V with an increment of 0.5 V. The mechanical
properties of the MS and GS with GMAW weld joints were investigated by performing the
tensile and hardness tests. In addition, the cross section of the weld area was also inspected
under the stereo microscope to observe the weld quality in terms of the weld penetration
and discontinuities. Results showed that the dissimilar materials of GS and MS could be
successfully joined by GMAW technique by applying the welding voltage and current of
18.0 V and 31 A, respectively. The ultimate tensile strength (UTS) of the successful joint
specimen is 324.7 MPa at which fracture occurs at the MS base metal during the tensile
test. Its maximum hardness value was found to be around 400 Hv, which is located at the
center of weld area.

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Downloads

Published

2019-05-15

How to Cite

Abu Khair, K., & Hj Redzuan, N. (2019). Characterization of Dissimilar Materials Joining using Gas Metal Arc Welding. Jurnal Mekanikal, 41(2-S). Retrieved from https://jurnalmekanikal.utm.my/index.php/jurnalmekanikal/article/view/336

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