Effects of Ultrasonic Vibration on Diffusion Welding of Aluminum(Materials, Metallurgy & Weldability)

T. Enjo, K. Ikeuchi, H. Fujita
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引用次数: 14

Abstract

The ultrasonic vibration has been applied in the diffusion welding of aluminum in an attempt to break up the superficial oxide film of the bond interface. The ultrasonic vibration and subsequent welding have been carried out in a vacuum of 10-2 Pa at 875 K to 893 K under a welding pressure of 1 to 3 MPa. The bond strength increased with the increase in the input power to the transducer and working time of ultrasonic vibration. The increase in pressure to the bond interface during the vibration, however, lowered the bond strength. TEM observation and electric resistance measurement of the bond interface revealed that the application of ultrasonic vibration had the effect of breaking up and dispersing the oxide film, which was closely related to the increase in bond strength. On the fractured surface of joint, dimple patterns, increased with the rise of bond strength. These portions may be regarded as places where the application of ultrasonic vibration promotes breaking up and dispersing the oxide film.
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超声振动对铝扩散焊接的影响(材料、冶金及可焊性)
将超声波振动应用于铝的扩散焊接中,试图破坏界面表面氧化膜。在875 ~ 893 K、10 ~ 2 Pa真空条件下,焊接压力为1 ~ 3mpa,进行了超声振动及后续焊接。结合强度随换能器输入功率的增大和超声振动工作时间的延长而增大。然而,在振动过程中,结合界面压力的增加降低了结合强度。结合界面的TEM观察和电阻测量表明,超声波振动的应用对氧化膜有破坏和分散的作用,这与结合强度的提高密切相关。在接头断裂面上,随着结合强度的增加,韧窝图案增多。这些部分可以看作是应用超声波振动促进氧化膜破裂和分散的地方。
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