Suppressing the Use of Critical Raw Materials in Joining of AISI 304 Stainless Steel Using Activated Tungsten Inert Gas Welding

Journal article


Balos, S., Dramicanin, M., Janjatovic, P., Zabunov, I., Pilic, B., Goel, S. and Szutkowska, M. (2019). Suppressing the Use of Critical Raw Materials in Joining of AISI 304 Stainless Steel Using Activated Tungsten Inert Gas Welding. Metals. 9 (11), p. 1187.
AuthorsBalos, S., Dramicanin, M., Janjatovic, P., Zabunov, I., Pilic, B., Goel, S. and Szutkowska, M.
Abstract

The aim of this study was to study the influence of TiO2 coating for its efficacy during the activated-tungsten inert gas (TIG) welding and to suppress the use of consumables that are rich in critical raw materials. Post-welding penetration depth, particle size distribution, microstructure, and microhardness of welded samples were assessed. Based on these results, it was found that there is no direct correlation between the weld metal surface area and the coating. The particle size in the coating, although, seemed to have played an important role, e.g., nanoparticles resulted in an increased penetration depth and depth/width (D/W) ratio as opposed to the submicron-sized particles. The most optimal welding condition resulted when a mixture of submicron-sized and nanometric-sized particles were used. It was demonstrated by the Zeta analyser results that the micron particles rub the nanoparticles due to mechanical friction resulting in smaller oxide particle formation in the coating. Finally, the presence of Marangoni convection in TIG and reversed Marangoni convection in the activated TIG (A-TIG) process were proven by means of the microstructure analysis and measurement, which were found to be positively correlated

KeywordsA-TIG welding; particle size; metal flow; penetration depth
Year2019
JournalMetals
Journal citation9 (11), p. 1187
PublisherMDPI
ISSN2075-4701
Digital Object Identifier (DOI)doi:https://doi.org/10.3390/met9111187
Web address (URL)https://www.mdpi.com/2075-4701/9/11/1187
Publication dates
Online04 Nov 2019
Publication process dates
Accepted21 Oct 2019
Deposited23 Dec 2019
Accepted author manuscript
License
CC BY 4.0
File Access Level
Controlled
Publisher's version
License
CC BY 4.0
File Access Level
Open
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