Digitale Medien
s.l. ; Stafa-Zurich, Switzerland
Materials science forum
Vol. 539-543 (Mar. 2007), p. 681-686
ISSN:
1662-9752
Quelle:
Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
Thema:
Maschinenbau
Notizen:
Fretting fatigue is a form of adhesive wear damage caused due to tangential micro motion oftwo contact bodies under normal pressure and cyclic load. Biomedical implants such as hip jointsand bone plates undergo fretting fatigue damage leading to premature in-vivo failure and revisionsurgeries. Surface modification of implants delays the process of fretting and thereby improves thelife of these medical devices. This work involves investigation of fretting fatigue damage of surfacetreated titanium alloys couple. The surface treatment involves PVD TiN coating, Plasma nitriding,Ion Implantation, Laser nitriding and thermal oxidation. Fretting of all surface treated alloys haveshown both adhesive and abrasive mode of contact damage. Friction coefficient of all the surfacetreated pairs is less compared to uncoated alloys. Plasma nitrided pairs have shown the bestperformance in terms of fretting fatigue life and friction coefficient compared to all other coatings.Ion implanted pairs have shown little improvement in fretting fatigue lives due to shallow modifiedlayer. PVD TiN coated pairs have irregular friction pattern due to abrasive particles at contact.Thermal oxidation and Laser nitriding have shown poor fretting fatigue performance due to highcase thickness
Materialart:
Digitale Medien
URL:
http://www.tib-hannover.de/fulltexts/2011/0528/02/14/transtech_doi~10.4028%252Fwww.scientific.net%252FMSF.539-543.681.pdf
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