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Characterization o Solid-State Vortices Associated with the Friction-Stir Welding of Copper to Aluminum

Published online by Cambridge University Press:  02 July 2020

R. D. Flores ,
L. E. Murr  and
E. A. Trillo
R. D. Flores
Affiliation:
Department of Metallurgical and Materials Engineering, The University of Texas at El Paso, El Paso, Texas, 79968
L. E. Murr
Affiliation:
Department of Metallurgical and Materials Engineering, The University of Texas at El Paso, El Paso, Texas, 79968
E. A. Trillo
Affiliation:
Department of Metallurgical and Materials Engineering, The University of Texas at El Paso, El Paso, Texas, 79968
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Extract

Although friction-stir welding has been developing as a viable industrial joining process over the past decade, only little attention has been given to the elucidation of associated microstructures. We have recently produced welds of copper to 6061 aluminum alloy using the technique illustrated in Fig. 1. In this process, a steel tool rod (0.6 cm diameter) or head-pin (HP) traverses the seam of 0.64 cm thick plates of copper butted against 6061-T6 aluminum at a rate (T in Fig. 1) of 1 mm/s; and rotating at a speed (R in Fig. 1) of 650 rpm (Fig. 1). A rather remarkable welding of these two materials results at temperatures measured to be around 400°C for 6061-T6 aluminum welded to itself. Consequently, the metals are stirred into one another by extreme plastic deformation which universally seems to involve dynamic recrystallization in the actual weld zone. There is no melting.

Type
Microscopy and Microanalysis in the “Real World”
Information
Microscopy and Microanalysis , Volume 4 , Issue S2: Proceedings: Microscopy & Microanalysis '98, Microscopy Society of America 56th Annual Meeting, Microbeam Analysis Society 32nd Annual Meeting, Atlanta, Georgia July 12-16, 1998 , July 1998 , pp. 530 - 531
Copyright
Copyright © Microscopy Society of America

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References

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