MULTI-VARIBLE OPTIMIZATION OF STAINLESS STEEL 304,310 WELDING USING GREY TAGUCHI METHOD AND RESPONSE SURFACE METHOD

Ravi Teja Peesapati, Venkat Teja Peesapati, Golla Ramanjulu, Sai Viswanath L

Abstract: Gas Tungsten Arc welding is one mostly preferred welding technique used for welding stainless steel because of concentrated heat source, very stable arc, calm welding pool of small size, sound and pure weld. Therefore for the present experimentation, TIG welding technique is used to join stainless steel 304,310. The experimentation is done on AISI 304,310 and analyses are performed to get Maximum Penetration and Minimum HAZ and Bead width. Since these output variables are inversely proportional (minimized and maximized at the same time), we have chosen Grey-taguchi method to optimize these variables. The process parameters chosen for the experimentation are pulse current, pulse frequency, welding speed, Arc force. Methodology of grey-taguchi method starts with Grey Relational Analysis. Using grey relational analysis, we find Grey Grade which inturn is used to find the optimal Range for the given parameters. Using S/N ratio graph, we can find the level of the process parameters which yield the required results. These values are checked for significance using RSM.

Keywords: GTAW, AISI 304, AISI 310, Grey-taguchi method, Response surface method

DOI: https://doi.org/10.15623/ijret.2017.0608015