Print Email Facebook Twitter Effect of ultrasonic welding process on the crystallinity at the welding interface of CF/PPS joints Title Effect of ultrasonic welding process on the crystallinity at the welding interface of CF/PPS joints Author Koutras, N. (TU Delft Structural Integrity & Composites) Villegas, I.F. (TU Delft Aerospace Manufacturing Technologies) Benedictus, R. (TU Delft Structural Integrity & Composites) Date 2020 Abstract The influence of the ultrasonic welding process parameters, namely the force and the vibration amplitude, on the crystallinity degree at the welding interface of CF/PPS (carbon fibre reinforced poly(phenylene) sulphide) joints is investigated. Two different sets of parameters, one representing high force and high vibration amplitude (1000 N, 86.2 μm) and one representing low force and low vibration amplitude (300 N, 51.8 μm), were used in this study. The temperature at the centre of the overlap was measured using K-type thermocouples in order to obtain the cooling rate for each set of parameters. Differential scanning calorimetry (DSC) and X-ray diffraction (XRD) measurements were performed in order to determine the crystallinity degree of PPS at the welding interface. It was found that a force of 300 N and a vibration amplitude of 51.8 μm could obtain a PPS of a moderate crystallinity degree (14.6%) and an average PPS crystallite size of 41.3 Å, showing that it is possible to obtain a semi-crystalline welding interface by appropriately modifying the process parameters. Subject CrystallinityDSCPPSThermoplastic CompositesUltrasonic Welding To reference this document use: http://resolver.tudelft.nl/uuid:9a5a47e9-1e34-49ca-9106-962b7d8e17bd Publisher Applied Mechanics Laboratory ISBN 9781510896932 Source ECCM 2018 - 18th European Conference on Composite Materials Event ECCM18: 18th European Conference on Composite Materials, 2018-06-24 → 2018-06-28, Athens, Greece Series ECCM 2018 - 18th European Conference on Composite Materials Part of collection Institutional Repository Document type conference paper Rights © 2020 N. Koutras, I.F. Villegas, R. Benedictus Files PDF 5b11d0e3b7ce45a2a8dc040a5 ... e9812e.pdf 914.8 KB Close viewer /islandora/object/uuid:9a5a47e9-1e34-49ca-9106-962b7d8e17bd/datastream/OBJ/view