International Transaction Journal of Engineering, Management, & Applied Sciences & Technologies


:: International Transaction Journal of Engineering, Management, & Applied Sciences & Technologies

ISSN 2228-9860
eISSN 1906-9642


Vol.12(1) (2021)

  • An Effective Quality Assessment Method for Plasma Welding Based on the Plasma Gas Flow Rates in Titanium Grade 2

    Adisak Aumpiem, Asa Prateepasen (Department of Production Engineering, King Mongkut's University of Technology Thonburi, THAILAND).

    Disciplinary: Welding Engineering and Technology.

    ➤ FullText

    doi: 10.14456/ITJEMAST.2021.5

    Keywords: Weld quality; Plasma gas; Titanium; Welding risk; Plasma arc welding (PAW); Heat-affected zone (HAZ).

    Most weld defects are from weld stops and starts. Plasma arc welding (PAW) is a process that it is necessary to repeat welding in the same area (start-stop area) to close a keyhole of pipe welding works in which this area obtain more heating rates than other welded areas. This study proposed a quality assessment in PAW by investigative the changing of plasma gas volume in welding a Titanium Grade 2. Weld studies involve the influent of the plasma gas led effects on "cycle start/stop" and weld zone in terms of ultimate tensile strength, hardness, welding profile, discolorations on surface welded, SEM and EDX. The results of the proposed method show that the plasma gas flow at 4.24-4.28 L/min gives the most positive results in both mechanical properties, welded profile, and discoloration of weld surface, while the hardness of weld metal and heat-affected zone (HAZ) less than the base material. Furthermore, Surface oxidation of weld zones was visual inspection is in according to standard and no negative results at 4.20-4.32 L/min and the heat repeated at the cycle of start/stop area causing coarse grain on the root welded. Such information is very useful so that appropriate welded quality assessment can be applied parameter to develop and achieve in the industry.

    Paper ID: 12A1E

    Cite this article:

    Aumpiem, A., Prateepasen, A. (2021). An Effective Quality Assessment Method for Plasma Welding Based on the Plasma Gas Flow Rates in Titanium Grade 2. International Transaction Journal of Engineering, Management, & Applied Sciences & Technologies, 12(1), 12A1E, 1-14.


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