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A Comparative Study on Direct and Pulsed Current Micro-plasma Arc Welding of Alloy Ti–6Al–4V

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Abstract

In this project, the sheet of Ti–6Al–4V alloy (annealed) with a thickness of 1 mm was welded with butt joints by means of pulsed current micro-plasma arc welding without using a filler metal. The purpose of this study is to optimize parameters in the event of increasing tensile strength by using pulse current and its comparison with the pulse-free system. Optical microscope and scanning electron microscope were used to investigate the type of phases, microstructure of weld metal, base metal and heat-affected zone. Results illustrated that due to the low thickness of the sheet, the non-use of filler metal in the welding process and the lower heat input of this process, all contributed to a higher cooling rate of the molten pool.

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Notes

  1. Pre-gas.

  2. Post-gas.

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Authors and Affiliations

  1. Department of Materials Engineering, Isfahan University of Technology, Isfahan, 8415683111, Iran

    Amirkeyvan Rahimi, Morteza Shamanian, Ahmadreza Rahimi & Jalal Kangazian

Authors
  1. Amirkeyvan Rahimi
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  2. Morteza Shamanian
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  3. Ahmadreza Rahimi
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  4. Jalal Kangazian
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Correspondence to Amirkeyvan Rahimi.

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Rahimi, A., Shamanian, M., Rahimi, A. et al. A Comparative Study on Direct and Pulsed Current Micro-plasma Arc Welding of Alloy Ti–6Al–4V. Trans Indian Inst Met 71, 3103–3110 (2018). https://doi.org/10.1007/s12666-018-1501-y

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  • DOI: https://doi.org/10.1007/s12666-018-1501-y

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