OPTIMIZING THE MAGNETIC ARC OSCILLATION PROCESS PARAMETERS TO ATTAIN MAXIMUM TENSILE STRENGTH USING RSM
Keywords:
AZ31B magnesium alloy, magnetic arc oscillation welding, response surface methodology, optimization, tensile strengthAbstract
In this investigation, an attempt has been made to predict the tensile strength of magnetic arc oscillation welded(MAO) AZ31B magnesium alloy joints using RSM incorporating process parameters such as current, welding speed, arc amplitude and oscillation frequency as variables. The experiments were conducted based on a four-factors, five-levels, central composite design matrix. The developed empirical relationship can be effectively used to predict the tensile strength of MAO joints of AZ31B magnesium alloy at 95% confidence level. The results indicated that welding current has the greatest influence on tensile strength, followed by the oscillation frequency amplitude and welding speed. Response surface methodology (RSM) was used to optimize MAO parameters to attain a maximum tensile strength of 248MPa (91 % of base metal strength) in the AZ31B Magnesium alloy joints.
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