Frank Balle, Stefan Emrich, Guntram Wagner, Dietmar Eifler, Alexander Brodyanski and Michael Kopnarski Improvement of Ultrasonically Welded Aluminum/Carbon Fiber Reinforced Polymer-Joints by Surface Technology and High Resolution Analysis Advanced Engineering Materials 15
The microstructure of ultrasonically welded Al/CFRP-joints is studied by microscopy and spectroscopy. Mechanically deformed areas near the hybrid interface are observed by HRTEM which lead to a reorientation of the crystal structure. Furthermore it is proven by EELS, that molten thermoplastic can penetrate into a cavernous, nanoscaled aluminum oxide layer corresponding to sub-microscopic interlocking and improved mechanical properties.
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