• Vinod D. Golakiya
• Nathani Ketankuamar V.

Keyhole gas tungsten arc welding is recently developed welding process which enables single pass welding without filler metal addition or joint preparation. Keyhole Tungsten inert gas (K- TIG) process with its high productivity and low investment can be successfully used for welding relatively heavy plates. SS316L plates of 8 mm thickness were joined in single pass without filler metal and without joint preparation by keyhole TIG welding. The effect of welding parameters on the fusion zone were investigated. The mechanical properties and material properties of the weld were analyzed. The tensile strength was almost same as the base metal. Hardness is reduced as compared to base metal. Also good penetration ratio was obtained. Numerical optimization was developed for welding process parameter by using response surface method (RSM). Central composite design (CCD) model developed using RSM was reasonably perfect. An attempt has been made to estimate the optimum welding conditions to produce the best possible output within the experimental constraints.

Keyhole gas tungsten arc welding, SS316L, Mechanical properties, Response surface method, Central composite design.

"Parametric optimization and Investigation of Mechanical property on ‘Keyhole TIG (K-TIG)’ weldment of SS-316L", International Journal of Emerging Technologies and Innovative Research (www.jetir.org), ISSN:2349-5162, Vol.6, Issue 5, page no.290-294, May-2019, Available :http://www.jetir.org/papers/JETIR1905O45.pdf

"Parametric optimization and Investigation of Mechanical property on ‘Keyhole TIG (K-TIG)’ weldment of SS-316L", International Journal of Emerging Technologies and Innovative Research (www.jetir.org | UGC and issn Approved), ISSN:2349-5162, Vol.6, Issue 5, page no. pp290-294, May-2019, Available at : http://www.jetir.org/papers/JETIR1905O45.pdf