Effect of Friction Welding Condition on Initial Joining Phenomena.

HASEGAWA, Masayoshi; IEDA, Toshiaki

doi:10.2207/qjjws.17.24

Cited by 3 publications

(1 citation statement)

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“…The fourth stage is the forge (upset) stage; in this stage friction torque increases when a brake is applied, and then drops to zero when the rotation stops. Many researchers have reported [2][3][4][5][6][7] on the joining phenomena of the third and fourth stages in the friction welding process, while others 8,9 have described the first and second stages. However, it is difficult to compare results because the materials, specimen shapes, and friction welding conditions were different in each study.…”

Section: Introductionmentioning

confidence: 99%

Joining phenomena during friction stage of A7075-T6 aluminium alloy friction weld

Kimura¹,

Kusaka²,

Suyama³

et al. 2005

Science and Technology of Welding and Joining

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This paper describes the effect of friction welding conditions on joining phenomena during the friction stage of type 7075-T6 aluminium alloy (A7075) friction welds. The friction torque had wear and seizure stages until the initial peak torque when A7075 was welded under high friction speed and low friction pressure, i.e. 27?5 rev s 21 and 30 MPa. Initial seizure and joining began at the central region (centre axis) of the welded interface, and extended towards the peripheral region (outer surface). On the other hand, when A7075 was welded under high friction speed and high friction pressure, i.e. 27?5 rev s 21 and 90 MPa, almost no wear stage existed before the initial peak torque. Initial seizure and joining began at the peripheral region of the welded interface and extended towards the central region. Then, the friction torque reached an initial peak torque when the welded interface was joined completely and upsetting of both base metals started. As a conclusion, the joining mechanism of A7075 friction welding was similar to that of low carbon steel.

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