Investigation on the influence of various welding parameters on the arc thermal efficiency of the GTAW process by calorimetric method

Mohammad Bagher Nasiri, Masoud Behzadinejad, Hamidreza Latifi*, Jukka Martikainen

*Corresponding author for this work

Research output: Contribution to journalArticleScientificpeer-review

10 Citations (Scopus)

Abstract

Arc efficiency of Gas Tungsten Arc Welding (GTAW) was determined by calorimetric method. A water-cooled anode calorimeter was designed and manufactured to measure the arc thermal efficiency, which was determined as a function of current, arc length, polarity and gas flow rate for GTAW of mild steel. With Direct Current Electrode Negative (DCEN) polarity and 5 mm arc length, a thermal efficiency of 67±4% was obtained, which was independent of the welding current. With Direct Current Electrode Positive (DCEP) polarity and 5 mm arc length, arc thermal efficiency was determined as 52±4%. The experimental data show that the arc efficiency decreases from 67% to 58% and 51% as the arc length increases from 5 mm to 11 and 17.5 mm, respectively. The experimental results also show that the arc efficiency is not significantly affected by the shielding gas flow rate.

Original languageEnglish
Pages (from-to)3255-3261
Number of pages7
JournalJournal of Mechanical Science and Technology
Volume28
Issue number8
DOIs
Publication statusPublished - 2014
MoE publication typeA1 Journal article-refereed

Keywords

  • Arc length
  • Arc welding
  • GTAW
  • Polarity
  • Thermal arc efficiency
  • Water-cooled anode calorimeter

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