About this Abstract |
Meeting |
2022 TMS Annual Meeting & Exhibition
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Symposium
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30 Years of Nanoindentation with the Oliver-Pharr Method and Beyond
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Presentation Title |
H-3: Nanoindentation of Semi-crystalline and Amorphous Thermoplastics |
Author(s) |
Petra Christoefl, Caterina Czibula, Michael Berer, Christian Teichert, Gerald Pinter, Gernot Oreski |
On-Site Speaker (Planned) |
Petra Christoefl |
Abstract Scope |
The investigation of polymers with nanoindentation (NI) is challenging since the deformation during loading is time-dependent, which can be described by viscoelasticity. Creep experiments can be combined with viscoelastic material modelling to better understand the time-dependent material behavior of polymers. In this study, spring-dashpot models will be used to describe the viscoelastic behaviour of amorphous as well as semi-crystalline polymers. The influence of morphological structures such as spherulites or crystal-lamellae of semi-crystalline polymers on localized NI depth-force behaviour is discussed controversially in literature. Hence, the main objective of this study is to investigate the influence of semi-crystallinity on NI results obtained for polyoxymethylene (POM) in comparison to amorphous poly(methyl methacrylate) (PMMA). Furthermore, the NI results will be compared with macroscopic compression test results. |
Proceedings Inclusion? |
Planned: |
Keywords |
Polymers, Characterization, Mechanical Properties |