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Effects on the Joining Condition of TiAl Alloy and SCM440 by Servo Motor Type Friction Welding
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 Title & Authors
Effects on the Joining Condition of TiAl Alloy and SCM440 by Servo Motor Type Friction Welding
Park, Jong-Moon; Kim, Ki-Young; Kim, Kyoung-Kyun; Oh, Myung-Hoon;
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In this study, characteristics of TiAl alloy and SCM440 (Cr-Mo steel) have been investigated with the various joining condition by servo motor type friction welder. The experimental factors of friction welder used in this study are spindle revolution, friction speed, and distance, upset speed and distance, respectively. Servo motor type friction welder could be controlled by the level of oil pressure, and it could be performed by position control dependence of electrical energy. Mechanical properties and morphology of welded interface were characterized by various joining condition. This aroused due to the bond strength dependence on friction heat and size of the heat affected zone. Therefore, it is necessary to have enough friction heat and decreased heat affected zone for good friction welding between dissimilar metals. An optimum bond was obtained between TiAl alloy and SCM440 by controlling friction speed and distance. At the spindle revolution 4,000 rpm, friction speed 120 mm/min, friction distance 15 mm, the bond strength was found to be 312 MPa.
TiAl alloy;SCM440;Servo-motor type friction welding;Joining factors;
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