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Microstructure-mechanical properties relationships in vibration welded glass-fiber-reinforced polyamide 66: A high-resolution X-ray microtomography study

Type
Articles dans des revues avec comité de lecture
Auteur
MOFAKHAMI, Eeva
86289 Laboratoire Procédés et Ingénierie en Mécanique et Matériaux [PIMM]
TENCÉ-GIRAULT, Sylvie
86289 Laboratoire Procédés et Ingénierie en Mécanique et Matériaux [PIMM]
PERRIN, Jonathan
1744 Synchrotron SOLEIL [SSOLEIL]
SCHEEL, Mario
1744 Synchrotron SOLEIL [SSOLEIL]
GERVAT, Laurent
133641 Technocentre Renault [Guyancourt]
OVALLE RODAS, Cristian
1157 Centre des Matériaux [MAT]
LAIARINANDRASANA, Lucien
1157 Centre des Matériaux [MAT]
FAYOLLE, Bruno
86289 Laboratoire Procédés et Ingénierie en Mécanique et Matériaux [PIMM]
MIQUELARD-GARNIER, Guillaume
86289 Laboratoire Procédés et Ingénierie en Mécanique et Matériaux [PIMM]

URI
http://hdl.handle.net/10985/18379
DOI
10.1016/j.polymertesting.2020.106454
Date
2020
Journal
Polymer Testing

Résumé

The effect of initial fiber orientation and welding conditions on the mechanical properties and microstructure of 30 wt% glass-fiber-reinforced polyamide 66 was systematically evaluated. For all conditions studied no significant change in the polymer matrix was evidenced. However, fibers in the welded zone were reoriented toward the squeeze and vibration flows and this reorientation is related to the appearance of cavities, as evidenced by high-resolution synchrotron-based X-ray microtomography. It is shown that stress at break values of the welded samples increase with the thickness of the weld zone together with the minimum value of the fiber orientation tensor component in the tensile direction. A drop of strain at break is also related to an increase in the fibers’ concentration in the weld. The maximum void volume fraction being measured on samples which have the thickest welded zones, counterintuitively it does not induce lower stress at break.

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Nom:
PIMM_PT_2020_GIRAULT.pdf
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3.625Mo
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Description:
Article
Fin d'embargo:
2020-11-30
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