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Reduction of Residual Stress of Welded Joint Using Local Plasticity Caused by Ultrasonic Vibration

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Abstract:

Welding is widely used for construction of many structures. It is well known that residual stress is measured on welded joint. In this paper, a new method for reduction of residual stress using ultrasonic vibration during welding is proposed. Two thin plates are butt-welded. When ultrasonic vibration is used on one plate, tensile residual stress is reduced at center of the bead. Second, ultrasonic vibrations with different frequencies are applied on both plates. In this case, reduction rate of residual stress increases. Next, reduction of tensile residual stress is demonstrated by simulation method using an analytical model with dynamic characteristics of welded joint.

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Periodical:

Key Engineering Materials (Volumes 340-341)

Pages:

1455-1460

DOI:

https://doi.org/10.4028/www.scientific.net/KEM.340-341.1455

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Online since:

June 2007

Authors:

Shigeru Aoki, Tadashi Nishimura, Tetsumaro Hiroi, Seiji Hirai

Keywords:

Nonlinear Vibration, Plastic Deformation, Residual Stress, Ultrasonic Vibration, Welding, X-Ray Diffraction Method

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© 2007 Trans Tech Publications Ltd. All Rights Reserved

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