Cause of angular distortion in fusion welding: asymmetric cross-sectional profile along thickness

Xie, Deqiao, Zhao, Jianfeng, Liang, Huixin, Liu, Shuang, Tian, Zongjun, Shen, Lida and Wang, Changjiang (2018) Cause of angular distortion in fusion welding: asymmetric cross-sectional profile along thickness. Materials, 12 (1). 58 1-14. ISSN 1996-1944

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Angular distortion is a common problem in fusion welding, especially when it comes to thick plates. Despite the fact that various processes and influencing factors have been discussed, the cause of the angular distortion has not been clearly revealed. In this research, the asymmetry of cross-sectional profile along thickness is considered of great importance to the angular distortion. A theoretical model concerning the melting-solidification process in fusion welding was established. An expression of the angular distortion was formulated and then validated by experiments of laser welding 316L stainless steel. The results show that the asymmetric cross-sectional profile is a major contributory factor towards the angular distortion mechanism. The asymmetry of cross-section profile along thickness causes the difference between two bending moments in the lower and upper parts of the joint. This is the difference that drives the angular distortion of the welded part. Besides, the asymmetry of cross-section profile is likely to be influenced by various processes and parameters, thereby changing the angular distortion.

Item Type: Article
Schools and Departments: School of Engineering and Informatics > Engineering and Design
Research Centres and Groups: Dynamics, Control and Vehicle Research Group
Subjects: T Technology > TA Engineering (General). Civil engineering (General) > TA0401 Materials of engineering and construction. Mechanics of materials
Depositing User: Chang Wang
Date Deposited: 08 Jan 2019 15:02
Last Modified: 08 Jan 2019 15:02

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