Friction welding process of 5052 aluminium alloy to 304 stainless steel

Abstract

T ype 5052 aluminium alloy was joined to type 304 austenitic stainless steel via a continuous drive friction welding process. T he joint strength increased, and then decreased after reaching a maximum value, with increasing friction time. Joint strength depended on the size and shape of the tensile testpiece. Friction weldability could be estimated by electrical resistmetry. T he process of friction welding between the aluminium alloy and the stainless steel is proposed to evolve as follows: welding progresses f rom the outer to the inner region; an unbonded region is retained at the centre of the weld interface with shorter friction time; longer friction time causes the formation of an intermetallic reaction layer at the weld interface; and the reaction layer grows as the f riction time increases. W hen the thickness of the reaction layer increased above a critical value, the joint was brittle and fractured at the weld interface. T he joint was sound when there was no unbonded region and a thin reaction layer formed along the entire weld interface.MST /4250

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Influence of friction welding parameters on properties of the Al-Cu joint

“…Friction welding of various materials was the subject of these authors previous research [1][2][3], as well as of certain other authors [4][5][6][7][8][9][10][11]. In those articles, it was shown that successful joining by friction welding could be done for different classes of steel [1][2][3][4][5], steels and other metals [6] or the light metals [7][8][9][10]. In addition, joints realized by classical friction welding, considered in this paper, can be compared to joints obtained by the friction stir welding procedure [11][12][13][14].…”

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