Abstract
Many previous studies proposed equations and models to estimate the heat-input of FSW, but their verifications would be still insufficient. In this study, the heat-input was calorimetrically measured during FSW of aluminum alloys with various welding tools having different shapes, and the effect of tool geometries on heat-input was examined. The measured heat-input increased with increasing shoulder diameter, which was in good agreement with many previous works. Interestingly, the heat-input strongly depended on the probe diameter and length. An attempt to correlate the heat-input with the tool surface area was made, virtually showing that the heat-input linearly increased with increasing “effective surface area” defined as (half of shoulder surface area + probe column surface area + probe tip surface area). This result experimentally suggested that the effect of probe dimension on heat-input was unexpectedly high. Moreover, an empirical equation estimating the heat-input during FSW of aluminum alloys from the welding parameters and the tool geometry was successfully established.
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Acknowledgements
The authors are grateful to Mr. A. Honda, Ms. F. Yu, Mr. W.Y. Park and Mr. P. Predeep for their technical assistance. They also wish to thank Dr. S. Mironov, Prof. A. Kawasaki, Prof. K. Anzai and Prof. K. Yoshimi for their helpful discussion. This work was partially supported by JSPS KAKENHI (a Grant-in-Aid for Challenging Exploratory Research, Grant No. 15K14137). This work was partially performed under the Joint Collaboration Program of Joining and Welding Research Institute, Osaka University.
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Sato, Y.S., Tanai, Y., Yi, D., Zhao, T., Kokawa, H. (2021). Effect of Tool Geometries on “Heat-Input” During Friction Stir Welding of Aluminum Alloys. In: Hovanski, Y., Sato, Y., Upadhyay, P., Naumov, A.A., Kumar, N. (eds) Friction Stir Welding and Processing XI . The Minerals, Metals & Materials Series. Springer, Cham. https://doi.org/10.1007/978-3-030-65265-4_16
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DOI: https://doi.org/10.1007/978-3-030-65265-4_16
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