Electron Microscopy Characterization of Friction Stir Welded 5083-H111 and 7075-T651 Aluminum Alloys

Izabela Kalemba-Rec; Mateusz Kopyściański

doi:10.4028/www.scientific.net/SSP.231.93

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Electron Microscopy Characterization of Friction Stir Welded 5083-H111 and 7075-T651 Aluminum Alloys

Abstract:

The microstructural characterization of butt friction stir welds of two different wrought aluminum alloys (work-hardened and heat treated) were studied. The detailed studies on the FSW process of dissimilar Al alloys are limited. In particular, the weld microstructure requires deeper characterization to better understand the phenomena occurring during mixing of dissimilar alloys.The characterization of friction stir welds was performed by scanning electron microscopy (an energy dispersive spectroscopy and an electron backscattered diffraction) and transmission electron microscopy. The dissimilar weld microstructure is complex, resembling a vortex-like structure. The microstructure of weld was highly asymmetrical with regard to the weld centerline. The research revealed a change in grain size in particular areas of the stirred zone. Recrystallization in the stirredzone occurred in particular areas in an irregular manner.

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XV International Conference on Electron Microscopy

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Solid State Phenomena (Volume 231)

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93-99

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https://doi.org/10.4028/www.scientific.net/SSP.231.93

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June 2015

Authors:

Izabela Kalemba-Rec*, Mateusz Kopyściański

Keywords:

Aluminium Alloy, Dissimilar Alloy Welding, FSW, Microstructure

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