Effect of process parameters on the mechanical properties and failure behavior of spot welded low carbon steel

Farizah Adliza Ghazali, Yupiter H P Manurung, Mohamed Ackiel Mohamed, Siti Khadijah Alias, Shahrum Abdullah

Research output: Contribution to journalArticle

10 Citations (Scopus)

Abstract

In this research, the effect of spot welding parameters on weld quality was investigated. The main affecting welding parameters such as weld current, weld time, electrode force and holding time were determined as the basis for quality evaluation. The selected quality features were classified into mechanical properties and failure behavior, which were required for application with highly dynamic loading. The peak load as one of the important mechanical properties, as well as the two distinct failure modes which were cross-nugget and complete button pull, were observed using tensile-shear stress. To obtain detailed shear stress testing results and to determine the significance of parameters, a servo-hydraulic testing machine was run at a constant cross-head speed of 2mm/min followed by statistical analysis methods, which were Taguchi's L16 orthogonal array and Analysis of Variance (ANOVA). Furthermore, the failure mode was to be observed based on the fracture surface used as reference for acceptance or rejection of the weld joint. Based on the results, the weld current was the significant factor affecting shear stress and the complete button pull was mostly found, which leads to the satisfactory condition of the joint. Cross-nugget and full button pull-out were the dominant failures observed in the lap-shear test. The cross-nugget failure leads to a low shear load, while complete button pull-out displays maximum shear load.

Original languageEnglish
Pages (from-to)1489-1497
Number of pages9
JournalJournal of Mechanical Engineering and Sciences
Volume8
DOIs
Publication statusPublished - 1 Jun 2015

Fingerprint

Low carbon steel
Welds
Mechanical properties
Shear stress
Failure modes
Spot welding
Testing
Analysis of variance (ANOVA)
Tensile stress
Loads (forces)
Statistical methods
Welding
Display devices
Hydraulics
Electrodes

Keywords

  • Failure mode
  • Process parameter
  • Resistance spot welding
  • Shear load

ASJC Scopus subject areas

  • Energy Engineering and Power Technology
  • Fuel Technology
  • Computational Mechanics
  • Industrial and Manufacturing Engineering
  • Mechanical Engineering
  • Mechanics of Materials

Cite this

Effect of process parameters on the mechanical properties and failure behavior of spot welded low carbon steel. / Ghazali, Farizah Adliza; Manurung, Yupiter H P; Mohamed, Mohamed Ackiel; Alias, Siti Khadijah; Abdullah, Shahrum.

In: Journal of Mechanical Engineering and Sciences, Vol. 8, 01.06.2015, p. 1489-1497.

Research output: Contribution to journalArticle

Ghazali, Farizah Adliza ; Manurung, Yupiter H P ; Mohamed, Mohamed Ackiel ; Alias, Siti Khadijah ; Abdullah, Shahrum. / Effect of process parameters on the mechanical properties and failure behavior of spot welded low carbon steel. In: Journal of Mechanical Engineering and Sciences. 2015 ; Vol. 8. pp. 1489-1497.
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