Electron Irradiation Effects on Strength and Ductility of Polymer Foils Studied by Femtosecond Laser-Processed Micro-Tensile Specimens
Abstract
:1. Introduction
2. Experimental
2.1. Materials
- Polyimide Upilex-S VDA (25.4 m-thickness) from UBE
- PET (Polyethylene terephthalate) (127 m) from Sheldahl
- FEP (Fluorinated ethylene propylene) VDA (127 m) from Sheldahl
Electron Irradiation Procedure
2.2. Methods
2.2.1. Laser Processing
2.2.2. Setup of Tensile Experiments
3. Results and Discussion
3.1. Influence of fs-Laser Processing
3.2. Tensile Experiments
3.3. Influence of Electron Beam Irradiation
3.3.1. Upilex-S VDA
3.3.2. PET
3.3.3. FEP VDA
3.4. Influence of fs-Laser Processing Atmosphere
4. Outlook—Local Thinning of the Polymer Foil
5. Conclusions
Author Contributions
Funding
Acknowledgments
Conflicts of Interest
Appendix A
References
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Irradiation Dose [kGy] | 0 | 250 | 500 | 750 | 1000 |
---|---|---|---|---|---|
Upilex-S VDA | ∘ | ∘ | ∘ | ∘ | |
PET | ∘ | ∘ | ∘ | ∘ | |
FEP VDA | ∘ | ∘ |
Upilex-S | FEP | PET | |
---|---|---|---|
VDA | VDA | ||
Fluence [J/cm] | 0.65 | 1.18 | 1.18 |
Pulse rep. rate [kHz] | 1 | 1 | 1 |
Scan speed [mm/s] | 2 | 2 | 2 |
Scan repetitions [−] | 15 | 40 | 40 |
Processing time [s] | ≈380 | ≈1000 | ≈1000 |
Taper angle [] |
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Pfeifenberger, M.J.; Milassin, G.; Hohenwarter, A.; Putz, B.; Semprimoschnig, C.O.A.; Pippan, R. Electron Irradiation Effects on Strength and Ductility of Polymer Foils Studied by Femtosecond Laser-Processed Micro-Tensile Specimens. Materials 2019, 12, 1468. https://doi.org/10.3390/ma12091468
Pfeifenberger MJ, Milassin G, Hohenwarter A, Putz B, Semprimoschnig COA, Pippan R. Electron Irradiation Effects on Strength and Ductility of Polymer Foils Studied by Femtosecond Laser-Processed Micro-Tensile Specimens. Materials. 2019; 12(9):1468. https://doi.org/10.3390/ma12091468
Chicago/Turabian StylePfeifenberger, Manuel J., Gabor Milassin, Anton Hohenwarter, Barbara Putz, Christopher O. A. Semprimoschnig, and Reinhard Pippan. 2019. "Electron Irradiation Effects on Strength and Ductility of Polymer Foils Studied by Femtosecond Laser-Processed Micro-Tensile Specimens" Materials 12, no. 9: 1468. https://doi.org/10.3390/ma12091468