✍ Scribed by S Saritas; R.P.M Procter; W.A Grant
No coin nor oath required. For personal study only.
Earlier studies of the effect of ion implantation on wear of Ti-6Al-4V have now been extended to an examination of the effect of ion implantation on fatigue, fretting and fretting-corrosion of this alloy. Using smooth rotating-bending fatigue specimens tested in air at a frequency of 47Hz it has been shown that nitrogen and boron implantation to doses of 2x 1017 ions cm-: at 40 keV have no effect on either the S-N curves or the fatigue endurance limit. These results are in contrast to the wear tests which showed that the wear behaviour of Ti-6AI-4V is improved by nitrogen and boron implantation. Using a Waterhouse-type test rig, fretting and fretting-corrosion of crossed cylinders have been examined at room temperature in air and sea water respectively. The applied load was 0.3 kg, the slip ampfitude 40 Itm and the test frequency 50 Hz. Damage was assessed quantitatively by Talysurf measurements and qualitatively by scanning electron microscopy, as a function of the number of fretting cycles. As in the case of finear wear, implantation of boron and nitrogen at 40 keV and to doses of 2× lO lz ions cm-: reduces both the coefficient of friction and the fretting wear volume in both air and sea water.
📜 SIMILAR VOLUMES
The objective of this work was to investigate the performance of several coatings and surface treatments subjected to fretting fatigue with Ti-6Al-4V specimens and pads. Five coating systems were initially chosen and tested using two different fretting fatigue apparatus. The five coating systems con
## Abstract Corrosion has been reported at the modular interfaces of total joint replacement implants, but with conflicting theories as to the cause of such damage. The modular design itself leaves the interface susceptible to galvanic, crevice, or fretting corrosion, or a combination of the three.