5. and describe its principle of operation in detail. The steel plates of 4.75 mm thickness weld together with an initial temperature of 27C by using welding transformer set at 30 V and 280 A. The welding speed and heat transfer efficiency are 5.45 mm/s and 86%. Calculate the peak temperature at distances of 3 mm from the fusion zone boundary with a step size of 1 mm. Show schematically the heat flow during the welding process with respect to the temperature gradient. Also, determine the distance at which peak temperature identified as 500C if the plates are preheated to 170C prior to welding. 10