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Experimental analysis of Weld Bead Geometry formed during Gas Metal Arc Welding

Jigesh Yadav

Abstract


A very important role is played by bead geometry in predicting the quality of weld as rate of cooling of weld depends on the height and bead width, also bead geometry determines its residual stresses and distortion.

Several welding parameters affect bead geometry. Poor fusion is produced by high arc travel rate and low arc power. Higher bead width is produced with high electrode feed rates which makes bead flatter. Other parameters like current, voltage, arc travel rate, and polarity also affects weld bead geometry.

Hence, Experimentations are performed on GMAW (Gas Metal Arc Welding) for finding out bead height and bead width based on various parameters. A model is also developed using linear regression for predicting weld bead geometry.  Relations between different weld parameters and weld bead geometry would also be investigated here

A very important role is played by bead geometry in predicting the quality of weld as rate of cooling of weld depends on the height and bead width, also bead geometry determines its residual stresses and distortion.

Several welding parameters affect bead geometry. Poor fusion is produced by high arc travel rate and low arc power. Higher bead width is produced with high electrode feed rates which makes bead flatter. Other parameters like current, voltage, arc travel rate, and polarity also affects weld bead geometry.

Hence, Experimentations are performed on GMAW (Gas Metal Arc Welding) for finding out bead height and bead width based on various parameters. A model is also developed using linear regression for predicting weld bead geometry.  Relations between different weld parameters and weld bead geometry would also be investigated here.

Keywords


weld bead geometry, GMAW, welding parameters, linear regression

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References


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