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Open AccessArticle

Correlation of Tribological Behavior and Fatigue Properties of Filled and Unfilled TPUs

Polymer Competence Center Leoben GmbH, Roseggerstraße 12, 8700 Leoben, Austria
Chair of Materials Science and Testing of Polymers, Montanuniversität Leoben, 8700 Leoben, Austria
Chair of Mechanical Engineering, Montanuniversität Leoben, 8700 Leoben, Austria
SKF Sealing Solutions Austria GmbH, 8750 Judenburg, Austria
Author to whom correspondence should be addressed.
Lubricants 2019, 7(7), 60;
Received: 6 June 2019 / Revised: 12 July 2019 / Accepted: 17 July 2019 / Published: 20 July 2019
(This article belongs to the Special Issue Tribology of Seals)
For a long service time, fatigue has been a typical problem that mechanical sealing materials face. How does it relate to tribological performance? In this study, filled and unfilled thermoplastic polyurethanes (TPUs) were investigated. Dumbbell and faint wait pure shear (FWPS) specimens were used to characterize the fatigue properties and crack growth rate of TPUs, respectively. Additionally, to identify the impact of temperature on fatigue tests, the tests were conducted at room temperature and 80 °C. Different tribological tests were conducted to investigate their tribological properties. Fracture surfaces from fatigue tests and worn surfaces from tribological tests were analyzed using a scanning electron microscope (SEM). Two wear models were verified to correlate between fatigue and tribological properties; one of the models is better for rough counter surfaces, while the other is advantageous if the counter surface is smooth. View Full-Text
Keywords: fatigue; filler; TPU; tribology; crack fatigue; filler; TPU; tribology; crack
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MDPI and ACS Style

Wang, C.; Stiller, T.; Hausberger, A.; Pinter, G.; Grün, F.; Schwarz, T. Correlation of Tribological Behavior and Fatigue Properties of Filled and Unfilled TPUs. Lubricants 2019, 7, 60.

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