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Effect of Welding by TIG Process of 304L Stainless Steel on Microstructure and Stress Corrosion Cracking

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Abstract:

Welding is the process of permanently joining materials and tungsten inert gas (TIG) welding is widely used due to its precision, controlled heat input, and cost-effectiveness. This study investigates the stress corrosion behavior of TIG-welded 304L stainless steel in a saline environment, analyzing factors contributing to material degradation. The research involved tensile testing and fractographic analysis to characterize fracture modes and determine the key influences on mechanical strength. Additionally, a microstructural analysis of the heat-affected zone (HAZ) was conducted to assess changes induced by welding. The results indicate that exposure to a chloride-rich environment led to a reduction in mechanical properties, primarily due to the formation of corrosion-related compounds and material thinning. Fractographic analysis revealed a transition in fracture modes, highlighting the influence of corrosion on failure mechanisms. Furthermore, microstructural examination showed significant alterations in the HAZ, which affected the overall integrity of the welded joints. These findings contribute to a better understanding of corrosion-induced degradation in welded 304L stainless steel and provide insights for optimizing welding parameters to improve durability.

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International Journal of Engineering Research in Africa Vol. 76 View Preview

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Periodical:

International Journal of Engineering Research in Africa (Volume 76)

Pages:

1-15

DOI:

https://doi.org/10.4028/p-94ge8A

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Online since:

November 2025

Authors:

Fatima Ezzohra El Garchani*, Omar Bensatte, Moulay Rachid Kabiri

Keywords:

Mechanical Properties, Microstructure, Stainless Steel, Stress Corrosion, Tungsten Inert Gas Welding

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© 2025 Trans Tech Publications Ltd. All Rights Reserved

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