• Rajan Singh
• Prof. Neeraj Nagayach
• Dr. Sayed Faisal Ahmed
• Dr. Nitin Tenguria

Gas metal arc welding (GMAW) is favoured for its adaptability, rapidity, and suitability for robotic automation in industrial settings. Local dry welding boasts a wide range of applications, frequently employed for the repair of ships, offshore oil platforms, and pipelines. It is the method of choice when aiming for top-tier weld quality. The drainage cover utilized in this welding process is crafted from aluminium. In the present investigation, we delve into underwater welding of local mild steel as the base material, employing a blend of argon and CO2 as the shielding gas, aluminium as the drainage cover. Vickers hardness test results reveal that the underwater welds exhibit higher hardness compared to land-based welds due to the rapid cooling rates involved.

GMAW, Hardness, under water welds, Arc welding

"A COMPREHENSIVE EXPERIMENTAL INVESTIGATION ON HARDNESS OF UNDERWATER WELDS PERFORMED THROUGH GAS METAL ARC WELDING", International Journal of Emerging Technologies and Innovative Research (www.jetir.org), ISSN:2349-5162, Vol.11, Issue 1, page no.e128-e133, January-2024, Available :http://www.jetir.org/papers/JETIR2401415.pdf

"A COMPREHENSIVE EXPERIMENTAL INVESTIGATION ON HARDNESS OF UNDERWATER WELDS PERFORMED THROUGH GAS METAL ARC WELDING", International Journal of Emerging Technologies and Innovative Research (www.jetir.org | UGC and issn Approved), ISSN:2349-5162, Vol.11, Issue 1, page no. ppe128-e133, January-2024, Available at : http://www.jetir.org/papers/JETIR2401415.pdf