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Investigation of integral endless fibre reinforced aluminium-polyamide 6 hybrid joints

: Auwera, Robin van der; Gerbken, T.; Kühn, M.; Woestmann, Franz-Josef; Dröder, K.; Busse, Matthias

Kroll, Lothar (Ed.):
3rd International MERGE Technologies Conference 2017. Conference Proceedings : IMTC 2017 Lightweight Structures; Merge Technologies for Multifunctional Lightweight Structures; 21st - 22nd September 2017, TU Chemnitz
Zwickau: Verlag Wissenschaftliche Scripten, 2017
ISBN: 978-3-95735-066-4
ISBN: 3-95735-066-2
International MERGE Technologies Conference Lightweight Structures (IMTC) <3, 2017, Chemnitz>
Conference Paper
Fraunhofer IFAM ()
hybrid design; low pressure die casting; aluminium; Metal Injection Moulding; polyamide 6; endless fibre

Joining processes or connecting elements of structural components are generally used for integration into the automotive body structure. Joining operations cause a locally increased tension profile due to local punctual loads. Thus, a continous and homogenous load path of components to be joines is preferred. Therefore, glass fibre fabrics were imbedded in aluminium-polyamide 6 components by various moulding processes. Along the process chain of aluminium casting and injection moulding, integral endless fibre- reinforced aluminium-polyamide-6 vcomposites were manufactured. Tensile tests of Al-PA6 Test specimens with glass fibres were performed. For the aluminium casting process, low pressure die casting (LPDC) was used. The aluminium melt is moved, against gravity by pressurized nitrogen inducing high quality casting with low porosity, depressions and szhrinkage defects. The grip at the aluminium fibre interface results from microscopic undercuts between metal and fibre. In a second process step, glass fibres and aluminium parts were inserted into the injection moulding machine in which the glass fibres were infiltraded with PA6. Present investigations address non-destructive testing by microcomputer tomography (yCT) to investigate the infiltration of the glass fibres. For destructive methods bytensile testing, the breaking load is affected by the number of layers, infiltration behabiour, fibre orientation and AL-PA6- interface.