A Study of Material Flow Behavior in Thickness Direction in Friction Stir Welding of 7075 Alloy Plate

Abstract:

Friction stir welding, which is considered to be a solid-state welding, possesses several advantages over conventional welding processes, is an effective approach to weld high-strength, large thickness and dissimilar materials. Material flow behavior on FSW was generally acknowledged to have effects on weld property. The material flow behavior in thickness direction of advancing and retreating side was analyzed by a numerical model established with cone-shape tool pin. Numerical results indicate that there exist material flow in thickness direction on both sides and the behavior was affected by welding and tool pin rotation speed. Decrease welding speed or increase rotation speed would make material deformation intensified, and increase the fluidity of the material.

• Periodical: Advanced Materials Research (Volumes 652-654)
• Pages: 2315-2319
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.652-654.2315
• Online since: January 2013
• Authors: Zheng Hua Guo, Wen Long Liu, Cheng Zhong Li, Jun Hua Cui, Gang Yao Zhao
• Keywords: Friction Stir Welding (FSW), Material Flow, Numerical Model, Thickness Direction

References

[1] Thomas W M, Nicholas E D, Needham L G, et al. Friction stir butt welding[P]. International Patent Application PCT/GB92102203 and Great Britain Patent Application GB9125978. 8, (1991).

[2] Collligan K: Welding journal, 1999, 7(2): 229-237.

[3] Guerra M, Schmidt C, McClure J, et al: Materials Characterization, 2003, 49, 95-101.

[4] Schmidt H, Dickerson T, Hattel J: Acta Materialia, 2006, 54, 1199-1209.

[5] S. Xu, X. Deng: CD-ROM Proceedings of the 21th Southeastern Conference on Theoretical and Applied Mechanics. Orlando, Florida, (2002).

[6] Schmidt H, Hattel J: Modelling and Simulation in Materials Science and Engineering. 2005, 13 (1): 77-93.

[7] Zhao Zhang, J. T. Chen: The International Journal of Advance Manufacturing Technology. 2011, 60: 959-975.