Multidirectional Pin-on-Disk Testing Device to Evaluate the Cross-shear Effect on the Wear of Biocompatible Materials
Abstract
:1. Introduction
2. Materials and Methods
2.1. The Computer-Numerical-Control Pin-On-Disk (CNC-POD) Wear Testing Device
2.1.1. Specimen Holders
2.1.2. Motion System
2.1.3. Load System
2.1.4. Control System
2.2. Tribological Tests
3. Results
3.1. Design
3.2. Tribological Results
3.2.1. Gross Observation
3.2.2. Volumetric Wear
3.2.3. Wear Rate Calculation
3.2.4. Scanning Electron Microscopy Analysis
3.2.5. Coefficient of Friction
4. Conclusions
- The x-y stage included in the motion system allows the device to reproduce a wide range of two-dimensional patterns in the millimeter scale under a specific load.
- A maximum load of 500 Newtons (112 pounds) can be applied to each testing station through linear actuators, which can be programmed individually.
- The CNC-POD is capable of measuring friction force during testing, and the coefficient of friction can be calculated on each testing station.
- Motions and loads are fully programmable through LabView.
- Six testing stations were included in the design of the CNC-POD in order to perform up to six wear tests simultaneously.
- Multidirectional motion seems to have an impact on the wear rate of the biocompatible alloy Ti-6Al-4V ELI. However, more extensive experimentation is required to confirm these results in metals.
Author Contributions
Funding
Conflicts of Interest
References
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Pattern | µ′f | σ (µ′f) | µ′r | σ (µ′r) | µ | σ (µ) |
---|---|---|---|---|---|---|
0 mm × 10 mm | 0.2666 | 0.1470 | 0.3001 | 0.0350 | 0.2833 | 0.1075 |
1 mm × 9 mm | 0.2996 | 0.0345 | 0.2998 | 0.1246 | 0.2997 | 0.0975 |
3 mm × 7 mm | 0.2921 | 0.0350 | 0.2903 | 0.0326 | 0.2912 | 0.0351 |
5 mm × 5 mm | 0.3068 | 0.1102 | 0.2784 | 0.0383 | 0.2926 | 0.1088 |
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Cortes, V.; Rodriguez Betancourth, C.A.; Ortega, J.A.; Huq, H. Multidirectional Pin-on-Disk Testing Device to Evaluate the Cross-shear Effect on the Wear of Biocompatible Materials. Instruments 2019, 3, 35. https://doi.org/10.3390/instruments3030035
Cortes V, Rodriguez Betancourth CA, Ortega JA, Huq H. Multidirectional Pin-on-Disk Testing Device to Evaluate the Cross-shear Effect on the Wear of Biocompatible Materials. Instruments. 2019; 3(3):35. https://doi.org/10.3390/instruments3030035
Chicago/Turabian StyleCortes, Vicente, Carlos A. Rodriguez Betancourth, Javier A. Ortega, and Hasina Huq. 2019. "Multidirectional Pin-on-Disk Testing Device to Evaluate the Cross-shear Effect on the Wear of Biocompatible Materials" Instruments 3, no. 3: 35. https://doi.org/10.3390/instruments3030035