EVALUATION OF AXIAL SHORTENING OF FRICTION WELDED JOINTS OF EN-24 AND ETP-COPPER CYLINDRICAL ROUNDS USING DOE CONCEPT
Keywords:
EN-24 steel, ETP copper, welding parameters, axial shortening, Taguchi method, Friction weldingAbstract
Welding of dissimilar materials has grabbed the attention of various industries and made them to utilize this application in manufacturing of automotive components like axle, shaft, gear, poppet valve and HT-cable. EN-24 is a high tensile alloy steel with specific Mechanical and Metallurgical properties. ETP-copper has high electrical & thermal conductivity, since EN-24 & ETP copper cylindrical rounds demonstrate variance in physical properties, mechanical properties & metallurgical properties, detecting proper welding process and practices is difficult. To overcome these difficulties friction welding is utilized in this work. In this experimental work EN24 and ETP –copper cylindrical rounds are welded by rotary friction welding using KUKA machine. There is an atomic bonding created in the joints of the welded materials at solid state. The objectives of the experiment are to weld two dissimilar materials and to evaluate the axial shortening.L9 Design of Taguchi technique which utilized in this work. The joints are welded by keeping the speed at constant rate and varying the Upset pressure, friction pressure, and friction time. S/N ratio in taguchi method and ANOVA table technique is used for the evaluation of axial shortening. The result of this experiment will be identifying the dominating parameters in axial shortening and to provide good welded joints for this dissimilar material.
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