Comparative Study on Tribological Behavior of Ti-6Al-7Nb and SS AISI 316L Alloys, for Total Hip Prosthesis
| Autor: | Dekhil Leila, Fellah Mamoun, Assala Omar, Alain Iost, Labaiz Mohamed |
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| Rok vydání: | 2014 |
| Předmět: | |
| Zdroj: | TMS 2014: 143rd Annual Meeting & Exhibition ISBN: 9783319485935 TMS 2014 Supplemental Proceedings TMS 2014 Supplemental Proceedings ISBN: 9781118889879 |
| DOI: | 10.1007/978-3-319-48237-8_32 |
| Popis: | Tribological behavior of biomaterials AISI 316L and Ti-6Al-7Nb was investigated by wear tests, using tribometers ball on disc and sphere on plane. These tests consisted of measuring the volumetric wear and the friction coefficient. Tribological tests have been carried out in ambient air with oscillating tribotester in accord with standards ISO 7148, ASTM G99-95a under different conditions of loads (3, 6 and 10N) and sliding speed (1, 15 and 25mm.s-1). As counter pairs, we used the 100Cr6 ball. Results show that the three alloys had similar friction and wear performance, although their grain structures and compositions are different. Large frictional fluctuations occurred, probably caused by formation and periodic, localized fracture of a transfer layer. Higher friction coefficient with larger fluctuation and higher wear rate were observed at the higher sidings speed. The wear mechanism of Ti-6Al-7Nb transforms from ploughing and peeling off wear at low sliding speed to plastic deformation and adhesive wear at elevated speed. |
| Databáze: | OpenAIRE |
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