Effect of shielding gas composition and pulsed current frequency on geometry and nitrogen content of 304L austenitic stainless-steel welds
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Saeed Hosseinzadeh
and
Massoud Goodarzi
Abstract
This study investigated the effects of pulsed current frequency and shielding gas composition on the weld metal geometry and nitrogen content. Austenitic stainless-steel sheets were welded by gas tungsten arc welding using 0, 0.5, 1, 2, 5, and 10 vol.% of nitrogen gas in argon shielding gas and pulse frequencies of 40, 80, 120, 160, and 200 Hz. Weld sections were recorded using a stereomicroscope. Weld depth and cross-section of the weld metal were measured by ImageJ® software and their changes were recorded. Nitrogen analysis tests were performed on the weld metal and, the results were analyzed. Investigations revealed that by increasing the nitrogen content of the shielding gas up to 10 vol.%, the nitrogen content of the weld metal almost doubles at the maximum nitrogen level. This increase was more considerable at higher current frequencies. Also, by increasing the pulsed current frequency, the weld pool and the weld metal depth-to-width ratio increased to 37 % and 44 %, respectively, at the maximum level of shielding gas nitrogen. In addition, at the frequency of 200 Hz, increasing nitrogen led to an 86 % and 72 % increase in the weld pool and the weld aspect ratio, respectively.
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Research ethics: Not applicable.
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Author contributions: The authors have accepted responsibility for the entire content of this manuscript and approved its submission. Both authors contributed to the study’s conception and design. Material preparation, data collection, and analysis were performed by Saeed Hosseinzadeh, under the supervision of Massoud Goodarzi. The first draft of the manuscript was written by Saeed Hosseinzadeh, and both authors commented on previous versions of the manuscript. Both authors read and approved the final manuscript.
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Competing interests: The authors state no conflict of interest.
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Research funding: None declared.
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Data availability: The raw data required to reproduce these findings cannot be shared at this time due to time limitations. However, some of the raw data will be available from the corresponding author upon reasonable request.
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Articles in the same Issue
- Frontmatter
- Original Papers
- Preparation of cellulose/activated carbon cells: application to the adsorption of cobalt from stagnant waters
- CNT/TiO2 nanocomposite for environmental remediation
- Examining the dual effect of copper nanoparticles and nitrogen doping on Cu@N-TiO2
- Mechanochemical synthesis of a red luminescent coordination polymer from a polydentate quinoline ligand with large conjugation
- Hybrid effect of neem seed and groundnut shell bio-fillers on the mechanical, water absorption and thermal properties of jute fiber reinforced epoxy composites
- Erosion behaviour of B4C/TiB2/Mo ceramic nozzles
- Facile fabrication of a flower-like superhydrophobic copper surface with superior corrosion resistance
- Characterisation of Fe, Cr and Al behaviour at the interface during diffusion bonding of ODS/Al couple
- Effect of shielding gas composition and pulsed current frequency on geometry and nitrogen content of 304L austenitic stainless-steel welds
- News
- DGM – Deutsche Gesellschaft für Materialkunde
